CA2510677A1 - Amino acid derived prodrugs of propofol, compositions and uses thereof - Google Patents

Amino acid derived prodrugs of propofol, compositions and uses thereof Download PDF

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CA2510677A1
CA2510677A1 CA002510677A CA2510677A CA2510677A1 CA 2510677 A1 CA2510677 A1 CA 2510677A1 CA 002510677 A CA002510677 A CA 002510677A CA 2510677 A CA2510677 A CA 2510677A CA 2510677 A1 CA2510677 A1 CA 2510677A1
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substituted
hydrogen
compound
aryl
group
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Inventor
Mark A. Gallop
Feng Xu
Kenneth C. Cundy
Vivek Sasikumar
Thomas W. Woiwode
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XenoPort Inc
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Xenoport, Inc.
Mark A. Gallop
Feng Xu
Kenneth C. Cundy
Vivek Sasikumar
Thomas W. Woiwode
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Publication of CA2510677A1 publication Critical patent/CA2510677A1/en
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    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C225/00—Compounds containing amino groups and doubly—bound oxygen atoms bound to the same carbon skeleton, at least one of the doubly—bound oxygen atoms not being part of a —CHO group, e.g. amino ketones
    • C07C225/02—Compounds containing amino groups and doubly—bound oxygen atoms bound to the same carbon skeleton, at least one of the doubly—bound oxygen atoms not being part of a —CHO group, e.g. amino ketones having amino groups bound to acyclic carbon atoms of the carbon skeleton
    • C07C225/14—Compounds containing amino groups and doubly—bound oxygen atoms bound to the same carbon skeleton, at least one of the doubly—bound oxygen atoms not being part of a —CHO group, e.g. amino ketones having amino groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being unsaturated
    • C07C225/16—Compounds containing amino groups and doubly—bound oxygen atoms bound to the same carbon skeleton, at least one of the doubly—bound oxygen atoms not being part of a —CHO group, e.g. amino ketones having amino groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being unsaturated and containing six-membered aromatic rings
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C229/00—Compounds containing amino and carboxyl groups bound to the same carbon skeleton
    • C07C229/02—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton
    • C07C229/04—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
    • C07C229/24—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having more than one carboxyl group bound to the carbon skeleton, e.g. aspartic acid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
    • A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
    • A61K47/62—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being a protein, peptide or polyamino acid
    • A61K47/64—Drug-peptide, drug-protein or drug-polyamino acid conjugates, i.e. the modifying agent being a peptide, protein or polyamino acid which is covalently bonded or complexed to a therapeutically active agent
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
    • A61P1/08—Drugs for disorders of the alimentary tract or the digestive system for nausea, cinetosis or vertigo; Antiemetics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P21/00—Drugs for disorders of the muscular or neuromuscular system
    • A61P21/04—Drugs for disorders of the muscular or neuromuscular system for myasthenia gravis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/02—Drugs for disorders of the nervous system for peripheral neuropathies
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/04—Centrally acting analgesics, e.g. opioids
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/08—Antiepileptics; Anticonvulsants
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/14—Drugs for disorders of the nervous system for treating abnormal movements, e.g. chorea, dyskinesia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/14—Drugs for disorders of the nervous system for treating abnormal movements, e.g. chorea, dyskinesia
    • A61P25/16—Anti-Parkinson drugs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/22—Anxiolytics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C229/00—Compounds containing amino and carboxyl groups bound to the same carbon skeleton
    • C07C229/02—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton
    • C07C229/04—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
    • C07C229/06—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton
    • C07C229/08—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton the nitrogen atom of the amino group being further bound to hydrogen atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C237/00—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups
    • C07C237/02—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups having the carbon atoms of the carboxamide groups bound to acyclic carbon atoms of the carbon skeleton
    • C07C237/04—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups having the carbon atoms of the carboxamide groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being acyclic and saturated
    • C07C237/12—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups having the carbon atoms of the carboxamide groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being acyclic and saturated having the nitrogen atom of at least one of the carboxamide groups bound to an acyclic carbon atom of a hydrocarbon radical substituted by carboxyl groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C329/00—Thiocarbonic acids; Halides, esters or anhydrides thereof
    • C07C329/02—Monothiocarbonic acids; Derivatives thereof
    • C07C329/04—Esters of monothiocarbonic acids
    • C07C329/06—Esters of monothiocarbonic acids having sulfur atoms of thiocarbonic groups bound to acyclic carbon atoms

Abstract

The present invention provides propofol prodrugs, methods of making propofol prodrugs, pharmaceutical compositions of propofol prodrugs and methods of using propofol prodrugs and pharmaceutical compositions thereof to treat or prevent diseases or disorders such as migraine headache pain and post-chemotherapy or post-operative surgery nausea and vomiting.

Description

AMINO ACID DERIVED PRODRUGS OF PROPOFOL, COMPOSITIONS AND
USES THEREOF
TECHNICAL FIELD
The present invention provides propofol prodrugs, methods of making propofol prodrugs, pharmaceutical compositions of propofol prodrugs and methods of using propofol prodrugs and pharmaceutical compositions thereof to treat or prevent diseases or disorders such as migraine headache pain and post-chemotherapy or post-operative surgery nausea and vomiting.
BACKGROUND ART
Propofol (2,6-diisopropylphenol), (1), is a low molecular weight phenol that is widely used as an intravenous sedative-hypnotic agent in the induction and maintenance of is anesthesia and/or sedation in mammals. The advantages of propofol as an anesthetic include rapid onset of anesthesia, rapid clearance, and minimal side effects (Langley et al., Drugs 1988, 35, 334-372). Propofol may mediate hypnotic effects through interaction with the GABAA receptor complex, a hetero-oligomeric ligand-gated chloride ion channel (Peduto et al., Anesthesiology 1991, 75, 1000-1009.).
OH
\ w ao Propofoi (1 ) Propofol is rapidly metabolized in mammals with the drug being eliminated predominantly as glucuronidated and sulfated conjugates of propofol and 4-hydroxypropofol (Langley et al., Drugs 1988, 35, 334-372). Propofol clearance exceeds liver blood flow, which indicates that extrahepatic tissues contribute to the overall 2s metabolism of the drug. Human intestinal mucosa glucuronidates propofol ira vitro and oral dosing studies in rats indicate that approximately 90% of the administered drug undergoes first pass metabolism, with extraction by the intestinal mucosa accounting for the bulk of this presystemic elimination (Raoof et al., Pharni. Res. 1996, 13, 891-895).
Because of its extensive first-pass metabolism, propofol is administered by injection or intravenous 30 infusion and oral administration has not been considered therapeutically effective.

Propofol has a broad range of biological and medical applications, which are evident at sub-anesthetic doses and include treatment and/or prevention of intractable migraine headache pain (Krusz et al., Headache 2000, 40, 224-230; Krusz, International Publication No. WO 00/54588). Propofol, when used to maintain anesthesia, causes a lower incidence s of post-operative nausea and vomiting ("PONV") when compared to common inhalation anesthetic agents and numerous controlled clincal studies support the anti-emetic activity of propofol (Tramer et al., Br. J. Anaesth. 1997, 78, 247-255; Brooker et al., Anaestlz.
Izztensive Care 1998, 26, 625-629; Gan et al., Anesthesiology 1997, 87, 779-784). Propofol has also been shown to have anti-emetic activity when used in conjunction with 1o chemotherapeutic compounds (Phelps et al., Ann. Pharmacother. 1996, 30, 290-292;
Borgeat et al., Oncology 1993, 50, 456-459; Borgeat et al., Can. J. Anaesth.
1994, 41, 1117-1119; Tomioka et al., Anesth. Analg.1999, 89, 798-799). Nausea, retching and/or vomiting induced by a variety of chemotherapeutic agents (e.g., cisplatin, cyclophosphamide, 5-fluorouracil, methotrexate, anthracycline drugs, etc.) has been is controlled by low-dose propofol infusion in patients refractory to prophylaxis with conventional anti-emetic drugs (e.g., serotonin antagonists and corticosteroids).
Propofol has also been used to treat patients with refractory status epilepticus (Brown et al., Plzarmacother. 1998, 32, 1053-1059; Kuisma et al., Epilepsia 1995, 36, 1241-1243; Walder et al., Neurology 2002, 58, 1327-1332; Sutherland et al., Anaesth.
2o Intensive Care 1994, 22, 733-737). Further, the anticonvulsant effects of propofol have also been demonstrated in rat efficacy models at sub-anesthetic doses (Holtkamp et al., Anra.
Neus°ol. 2001, 49, 260-263; Hasan et al., Pharmacol. Toxicol. 1994, 74, 50-53).
Propofol has also been used as an antioxidant (Murphy et al., Br. J. Anaesth.
1992, 68, 613-618; Sagara et al., J. Neuroclzenz. 1999, 73, 2524-2530; Young et al., Eur. J.
2s Anaestlzesiol. 1997,14, 320-326; Wang et al. Eur. J. Pharmacol. 2002, 452, 303-308).
Propofol, at doses typically used for surgical anesthesia, has observable antioxidant effects in humans (De la Cruz et al., Anesth. Analg. 1999, 89, 1050-1055).
Pathogenesis or subsequent damage pathways in various neurodegenerative diseases involve reactive oxygen species and accordingly may be treated or prevented with antioxidants (Simonian et 3o al., Plzarnzacol. Toxieol. 1996, 36, 83-106). Examples of specific neurodegenerative diseases which may be treated or prevented with anti-oxidants include, but are not limited to, Friedrich's disease, Parkinson's disease, Alzheimer's disease, Huntington's disease, amyotrophic lateral sclerosis ("ALS"), multiple sclerosis ("MS"), Pick disease, inflammatory diseases and diseases caused by inflammatory mediators such as tumor necrosis factor (TNF) and IL-1.
A significant problem with the formulation and use of propofol is poor water solubility. Accordingly, propofol must be specially formulated in aqueous media using s solubilizers or emulsifiers (Briggs et al., Anaestlaesia 1982, 37, 1099-1101). For example, in a current commercial product (Diprivan~, Astra-Zeneca) an oil-in-water emulsion (the emulsifier is the lecithin mixture Intralipid~), is used to formulate propofol (Picard et al., Anestla. Analg. 2000, 90, 963-969). Unfortunately, the oil-in-water emulsion formulation causes discomfort and pain at the site of injection.
One potential solution to the poor water solubility of propofol which avoids the use of additives, solubilizers or emulsifiers and the attendant injection site pain, is a water-soluble, stable propofol prodrug that is converted to propofol in vivo.
(Hendler et al., International Publication No. WO 99/58555; Morimoto et al., International Publication No.
WO 00/48572; Hendler et al., United States Patent No. 6,254,853; Stella et al., United ~s States Patent Application No. US2001/0025035; Hendler, United States Patent No.
6,362,234; Hendler, International Publication No. WO 02/13810; Sagara et al., .l.
Neu~~ochem. 1999, 73, 2524-2530; Banaszczyk et al., Anesth. Analg. 2002, 95, 1285-1292;
Trapani et al., Int. J. Pharm. 1998,175, 195-204; Trapani et al., J. Med.
Chem. 1998, 41, 1846-1854; Anderson et al., J. Med. Chem. 2001, 44, 3582-3591; Pop et al., Med. Chem.
2o Res. 1992, 2, 16-21 ). A significant problem with these existing propofol prodrugs is their high stability in vivo. This stability prevents release of therapeutically significant concentrations of propofol, particularly when the prodrug is orally administered.
Accordingly, there is a need for propofol prodrugs, which are sufficiently labile under physiological conditions to provide therapeutically effective concentrations of 2s propofol, particularly, when the prodrug is orally administered.
SUMMARY
Disclosed herein are propofol prodrugs, methods of making propofol prodrugs, pharmaceutical compositions of propofol prodrugs and methods of using propofol prodrugs 3o to treat or prevent diseases or disorders such as migraine headache pain, neurodegenerative disorders and post-chemotherapy or post-operative surgery nausea and vomiting which satisfies the above need. In one embodiment, prodrugs of propofol and pharmaceutical compositions thereof are orally administered. In another embodiment, prodrugs of propofol are translocated across the gastrointestinal mucosa via interaction with transporter proteins expressed within enterocytes lining the gastrointestinal tract.
In a first aspect, a compound of structural Formula (I) is provided:
O
H
R.~ N R2 ~ mX
O O
O
or a pharmaceutically acceptable salt, hydrate, solvate or N-oxide thereof, wherein:
X is selected from the group consisting of a bond, -CHa-, -NRi i-, _O- and -S-;
m is 1 or 2;
nis0orl;
Rl is selected from the group consisting of hydrogen, [RSNH(CHR4)pC(O)]-, R6-, io R6C(O)- and R60C(O)-;
RZ is -OR7 or -[NRg(CHR9)gC(O)OR7];
p and q are independently 1 or 2;
R3 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkoxycarbonyl, aryl, substituted aryl, arylalkyl, caxbamoyl, substituted carbamoyl, ~s cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
each R4 is independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkoxy, substituted allcoxy, acyl, substituted acyl, alleoxycarbonyl, substituted alkoxycarbonyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, 2o carbamoyl, substituted carbamoyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl, substituted heteroalkyl, heteroaryl, substituted heteroaryl, heteroarylalkyl and substituted heteroarylalkyl, or optionally, when R4 and RS
are attached to adj acent atoms then R4 and RS together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring;
2s RS is selected from the group consisting of hydrogen, R6-, R6C(O)- and R60C(O)-;

R6 is selected from the group consisting of alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
R7 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
R8 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
to each R9 is independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, acyl, substituted acyl, alkoxycarbonyl, substituted alkoxycaxbonyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, carbamoyl, substituted carbamoyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl, substituted heteroalkyl, heteroaryl, substituted is heteroaryl, heteroarylalkyl and substituted heteroarylalkyl, or optionally, when Rg and R9 axe attached to adjacent atoms then R8 and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring;
Rl l is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl, substituted cycloallcyl, cycloheteroalkyl, heteroaryl, 2o substituted heteroaryl and heteroarylalkyl;
with the provisos that:
when Rl is [RSNH(CHR4)pC(O)]- then RZ is -OR7;
and when RZ is -[NR$(CHR9)qC(O)OR7] then Rl is not [RSNH(CHR4)pC(O)]-.
In a another aspect, a compound of structural Formula (II) is provided:
Rs 0 Rs R1~N q ~ O
R9 ~- n or a pharmaceutically acceptable salt, hydrate, solvate or N-oxide thereof, wherein:
Rl° is hydrogen or [RSNH(CHR4)pC(O)]-;
nis0orl;
p and q are independently 1 or 2;
each of R3, R4, R5, R8 and R9 is as described above;
with the proviso that when Rl° is hydrogen then n is 1.
In still another aspect, pharmaceutical compositions are provided. The pharmaceutical compositions disclosed herein generally comprise one or more compounds s of Formulae (I) - (XVIII), and a pharmaceutically acceptable vehicle such as a diluent, carrier, excipient or adjuvant. The choice of diluent, carrier, excipient and adjuvant will depend upon, among other factors, the desired mode of administration. In one embodiment, the mode of administration is oral.
In still another aspect, methods for treating various diseases or disorders are Io provided. The methods disclosed herein generally comprise administering one or more compounds of Formulae (I) - (XVIII) in order to achieve a therapeutically effective concentration of propofol in the blood and/or tissue of a patient. The methods are useful for treating or preventing diseases or disorders including, but not limited to, migraine headache pain, post-chemotherapy or post-operative surgery nausea and vomiting and is neurodegenerative disorders (e.g., epilepsy, Friedrich's disease, Parkinson's disease, Alzheimer's disease, Huntington's disease, amyotrophic lateral sclerosis (ALS), multiple sclerosis (MS), Pick disease, etc.). The methods generally involve administering to a patient in need of such treatment or prevention a therapeutically effective amount of one or more compounds of Formulae (I) - (XVIII), or pharmaceutical composition containing one 20 or more compounds of Formulae (I) - (XUIII).
In still another aspect, methods for inducing and/or maintaining anesthesia or sedation in a mammal are provided. The methods generally involve administering to a patient in need of such anesthesia or sedation induction and/or maintenance a therapeutically effective amount of one or more compounds of Formulae (I) -(XVIII), or 2s pharmaceutical composition containing one or more compounds of Formulae (I) - (XVIII).
DETAILED DESCRIPTION
Definitions 30 "Alkyl" by itself or as part of another substituent refers to a saturated or unsaturated, branched, straight-chain or cyclic monovalent hydrocarbon radical derived by the removal of one hydrogen atom from a single carbon atom of a parent alkane, alkene or alkyne.
Typical alkyl groups include, but are not limited to, methyl; ethyls such as ethanyl, ethenyl, ethynyl; propyls such as propan-1-yl, propan-2-yl, cyclopropan-1-yl, prop-1-en-1-yl, prop-1-en-2-yl, prop-2-en-1-yl (allyl), cycloprop-1-en-1-yl; cycloprop-2-en-1-yl, prop-1-yn-1-yl, prop-2-yn-1-yl, etc.; butyls such as butan-1-yl, butan-2-yl, 2-methyl-propan-1-yl, 2-methyl-propan-2-yl, cyclobutan-1-yl, but-1-en-1-yl, but-1-en-2-yl, s 2-methyl-prop-1-en-1-yl, but-2-en-1-yl, but-2-en-2-yl, buta-1,3-dien-1-yl, buta-1,3-dien-2-yl, cyclobut-1-en-1-yl, cyclobut-1-en-3-yl, cyclobuta-1,3-dien-1-yl, but-1-yn-1-yl, but-1-yn-3-yl, but-3-yn-1-yl, etc.; and the like.
The term "alkyl" is specifically intended to include groups having any degree or level of saturation, i.e., groups having exclusively single carbon-carbon bonds, groups Io having one or more double carbon-carbon bonds, groups having one or more triple carbon-carbon bonds and groups having mixtures of single, double and triple carbon-carbon bonds. Where a specific level of saturation is intended, the expressions "alkanyl,"
"alkenyl," and "alkynyl" are used. Preferably, an alkyl group comprises from 1 to 20 carbon atoms, more preferably, from 1 to 10 carbon atoms, even more preferably, 1 to 6 Is carbon atoms. "C1_6 alkyl" refers to an alkyl group containing from 1 to 6 carbon atoms.
"Alkanyl" by itself or as part of another substituent refers to a saturated branched, straight-chain or cyclic alkyl radical derived by the removal of one hydrogen atom from a single carbon atom of a parent alkane. Typical alkanyl groups include, but are not limited to, methanyl; ethanyl; propanyls such as propan-1-yl, propan-2-yl (isopropyl), 2o cyclopropan-1-yl, etc.; butanyls such as butan-1-yl, butan-2-yl (sec-butyl), 2-methyl-propan-1-yl (isobutyl), 2-methyl-propan-2-yl (t-butyl), cyclobutan-1-yl, etc.; and the like.
"Alkenyl" by itself or as part of another substituent refers to an unsaturated branched, straight-chain or cyclic alkyl radical having at least one carbon-carbon double 2s bond derived by the removal of one hydrogen atom from a single carbon atom of a parent alkene. The group may be in either the cis or traps conformation about the double bond(s).
Typical alkenyl groups include, but are not limited to, ethenyl; propenyls such as prop-1-en-1-yl, prop-1-en-2-yl, prop-2-en-1-yl (allyl), prop-2-en-2-yl, cycloprop-1-en-1-yl;
cycloprop-2-en-1-yl ; butenyls such as but-1-en-1-yl, but-1-en-2-yl, 30 2-methyl-prop-1-en-1-yl, but-2-en-1-yl, but-2-en-1-yl, but-2-en-2-yl, buta-1,3-dien-1-yl, buta-1,3-dien-2-yl, cyclobut-1-en-1-yl, cyclobut-1-en-3-yl, cyclobuta-1,3-dien-1-yl, etc.;
and the like.
"A1~~X1" by itself or as part of another substituent refers to an unsaturated branched, straight-chain or cyclic alkyl radical having at least one carbon-carbon triple bond derived by the removal of one hydrogen atom from a single carbon atom of a parent alkyne.
Typical alkynyl groups include, but are not limited to, ethynyl; propynyls such as s prop-1-yn-1-yl, prop-2-yn-1-yl, etc.; butynyls such as but-1-yn-1-yl, but-1-yn-3-yl, but-3-yn-1-yl, etc.; and the like.
"Acvl" by itself or as part of another substituent refers to a radical -C(O)R3°, where R3° is hydrogen, alkyl, cycloalkyl, cycloheteroalkyl, aryl, arylalkyl, heteroalkyl, heteroaryl, heteroarylalkyl as defined herein. Representative examples include, but are not limited to to formyl, acetyl, cyclohexylcarbonyl, cyclohexylmethylcarbonyl, benzoyl, benzylcarbonyl and the like.
"Alkoxy" by itself or as part of another substituent refers to a radical -OR31 where R31 represents an alkyl or cycloalkyl group as defined herein. Representative examples include, but are not limited to, methoxy, ethoxy, propoxy, butoxy, cyclohexyloxy and the 1 s like.
"Alkoxycarbon~" by itself or as part of another substituent, refers to a radical -C(O)OR31 where R31 is as defined above.
"Aryl" by itself or as part of another substituent refers to a monovalent aromatic hydrocarbon radical derived by the removal of one hydrogen atom from a single carbon 2o atom of a parent aromatic ring system. Typical aryl groups include, but are not limited to, groups derived from aceanthrylene, acenaphthylene, acephenanthrylene, anthracene, azulene, benzene, chrysene, coronene, fluoranthene, fluorene, hexacene, hexaphene, hexalene, as-indacene, s-indacene, indane, indene, naphthalene, octacene, octaphene, octalene, ovalene, penta-2,4-dime, pentacene, pentalene, pentaphene, perylene, phenalene, 2s phenanthrene, picene, pleiadene, pyrene, pyranthrene, rubicene, triphenylene, trinaphthalene and the like. Preferably, an aryl group comprises from 6 to 20 carbon atoms, more preferably, from 6 to 12 carbon atoms.
"Arylall~~" by itself or as part of another substituent refers to an acyclic alkyl radical in which one of the hydrogen atoms bonded to a carbon atom, typically a terminal or 3o spa carbon atom, is replaced with an aryl group. Typical arylalkyl groups include, but are not limited to, benzyl, 2-phenylethan-1-yl, 2-phenylethen-1-yl, naphthylmethyl, 2-naphthylethan-1-yl, 2-naphthylethen-1-yl, naphthobenzyl, 2-naphthophenylethan-1-yl and the like. Where specific alkyl moieties are intended, the nomenclature arylalkanyl, arylalkenyl and/or arylalkynyl is used. Preferably, an arylalkyl group is (C6-C3o) arylalkyl, e.g., the alkanyl, alkenyl or alkynyl moiety of the arylalkyl group is (Cl-Clo) and the aryl moiety is (C6-C2o), more preferably, an arylalkyl group is (C6-C2o) arylalkyl, e.g., the alkanyl, alkenyl or alkynyl moiety of the arylalkyl group is (C1-C$) and the aryl moiety is (C6-C12).
"Carbamoyl" by itself or as part of another substituent refers to the radical -C(O)N(R32)R33 where R32 and R33 are independently hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, heteroarylalkyl, substituted heteroarylalkyl, heteroaryl or substituted heteroaryl, as defined herein.
"Compounds" as used herein refer to compounds encompassed by the generic formulae disclosed herein and include any specific compounds within those formulae whose structure is disclosed herein. The compounds may be identified either by their chemical structure and/or chemical name. When the chemical structure and chemical name conflict, v the chemical structure is determinative of the identity of the compound. The compounds is may contain one or more chiral centers and/or double bonds and therefore, may exist as stereoisomers, such as double-bond isomers (i.e., geometric isomers), enantiomers or diastereomers. Accordingly, when stereochemistry at chiral centers is not specified, the chemical structures depicted herein encompass all possible configurations at those chiral centers including the stereoisornerically pure form (e.g., geometrically pure, 2o enantiomerically pure or diastereomerically pure) and enantiomeric and stereoisomeric mixtures. Enantiomeric and stereoisomeric mixtures can be resolved into their component enantiomers or stereoisomers using separation techniques or chiral synthesis techniques well known to the skilled artisan. The compounds may also exist in several tautomeric forms including the enol form, the keto form and mixtures thereof.
Accordingly, the 2s chemical structures depicted herein encompass all possible tautomeric forms of the illustrated compounds. The compounds also include isotopically labeled compounds where one or more atoms have an atomic mass different from the atomic mass conventionally found in nature. Examples of isotopes that may be incorporated into the compounds include, but are not limited to, 2H, 3H, 13C, 14C, isN,17Q, and 180. Compounds may exist in 3o unsolvated forms as well as solvated forms, including hydrated forms and as N-oxides. In general, the hydrated, solvated and N-oxide forms are within the scope of the present invention. Certain compounds may exist in multiple crystalline or amorphous forms. In general, all physical forms are equivalent for the uses contemplated herein and are intended to be within the scope of the present disclosure. Further, it should be understood, when partial structures of the compounds are illustrated, that brackets indicate the point of attachment of the partial structure to the rest of the molecule.
"Cycloalk~" by itself or as part of another substituent refers to a saturated or s unsaturated cyclic alkyl radical. Where a specific level of saturation is intended, the nomenclature "cycloalkanyl" or "cycloalkenyl" is used. Typical cycloalkyl groups include, but are not limited to, groups derived from cyclopropane, cyclobutane, cyclopentane, cyclohexane, and the like. Preferably, the cycloalkyl group is (C3-C1°) cycloalkyl, more preferably, (C3-C7) cycloalkyl.
"Cycloheteroalky_1" by itself or as part of another substituent refers to a saturated or unsaturated cyclic alkyl radical in which one or more carbon atoms (and any associated hydrogen atoms) are independently replaced with the same or different heteroatom. Typical heteroatoms to replace the carbon atoms) include, but are not limited to, N, P, O, S, Si, etc.
Where a specific level of saturation is intended, the nomenclature "cycloheteroalkanyl" or ~s "cycloheteroalkenyl" is used. Typical cycloheteroalkyl groups include, but are not limited to, groups derived from epoxides, azirines, thiiranes, imidazolidine, morpholine, piperazine, piperidine, pyrazolidine, pyrrolidine, quinuclidine and the like.
"Heteroalkyl, Heteroalkanyl, Heteroalkenyl and Heteroalkynyl" by themselves or as part of another substituent refer to alkyl, alkanyl, alkenyl and alkynyl groups, respectively, 2o in which one or more of the carbon atoms (and any associated hydrogen atoms) are independently replaced with the same or different heteroatomic groups. Typical heteroatomic groups which can be included in these groups include, but are not limited to, -O-~ -S-~ -O-O-~ -S-S-~ -O-S-~ -~34R3s-~ N-N=~ -N-N-a -N N-~36R37~ -pRss-~ -P(O)2_ -POR39-, -O-P(O)2-, -SO-, -SOa-, -SnR4°R41- and the like, where R34, R35, R36, R37, R38, R39;
2s R4° and R41 are independently hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl, substituted heteroalkyl, heteroaryl, substituted heteroaryl, heteroarylalkyl or substituted heteroarylalkyl.
"Heteroaryl" by itself or as part of another substituent refers to a monovalent 3o heteroaromatic radical derived by the removal of one hydrogen atom from a single atom of a parent heteroaromatic ring system. Typical heteroaryl groups include, but are not limited to, groups derived from acridine, arsindole, carbazole, (3-carboline, chromane, chromene, cinnoline, furan, imidazole, indazole, indole, indoline, indolizine, isobenzofuran, isochromene, isoindole, isoindoline, isoquinoline, isothiazole, isoxazole, naphthyridine, oxadiazole, oxazole, perimidine, phenanthridine, phenanthroline, phenazine, phthalazine, pteridine, purine, pyran, pyrazine, pyrazole, pyridazine, pyridine, pyrimidine, pyrrole, pyrrolizine, quinazoline, quinoline, quinolizine, quinoxaline, tetrazole, thiadiazole, thiazole, s thiophene, triazole, xanthene, and the like. Preferably, the heteroaryl group is from 5-20 membered heteroaryl, more preferably from 5-10 membered heteroaryl. Preferred heteroaryl groups are those derived from thiophene, pyrrole, benzothiophene, benzofuran, indole, pyridine, quinoline, imidazole, oxazole and pyrazine.
"Heteroarylalkyl" by itself or as part of another substituent refers to an acyclic alkyl radical in which one of the hydrogen atoms bonded to a carbon atom, typically a terminal or spa carbon atom, is replaced with a heteroaryl group. Where specific alkyl moieties are intended, the nomenclature heteroaxylalkanyl, heteroarylallcenyl and/or heterorylalkynyl is used. In preferred embodiments, the heteroarylalkyl group is a 6-30 membered heteroarylalkyl, e.g., the alkanyl, alkenyl or alkynyl moiety of the heteroarylalkyl is 1-10 Is membered and the heteroaryl moiety is a 5-20-membered heteroaryl, more preferably, 6-20 membered heteroarylalkyl, e.g., the alkanyl, alkenyl or alkynyl moiety of the heteroarylalkyl is 1-8 membered and the heteroaryl moiety is a 5-12-membered heteroaryl.
"Parent Aromatic Ring System" refers to an unsaturated cyclic or polycyclic ring system having a conjugated ~c electron system. Specifically included within the definition 20 of "parent aromatic ring system" are fused ring systems in which one or more of the rings are aromatic and one or more of the rings are saturated or unsaturated, such as, for example, fluorene, indane, indene, phenalene, etc. Typical aromatic ring systems include, but are not limited to, aceanthrylene, acenaphthylene, acephenanthrylene, anthracene, azulene, benzene, chrysene, coronene, fluoranthene, fluorene, hexacene, hexaphene, hexalene, 2s as-indacene, s-indacene, indane, indene, naphthalene, octacene, octaphene, octalene, ovalene, penta-2,4-dime, pentacene, pentalene, pentaphene, perylene, phenalene, phenanthrene, picene, pleiadene, pyrene, pyranthrene, rubicene, triphenylene, trinaphthalene and the like.
"Parent Heteroaromatic Ring System" refers to an aromatic ring system in which so one or more carbon atoms (and any associated hydrogen atoms) are independently replaced with the same or different heteroatom. Typical heteroatoms to replace the carbon atoms include, but are not limited to, N, P, O, S, Si, etc. Specifically included within the definition of "parent heteroaromatic ring systems" are fused ring systems in which one or more of the rings are aromatic and one or more of the rings are saturated or unsaturated, such as, for example, arsindole, benzodioxan, benzofuran, chromane, chromene, indole, indoline, xanthene, etc. Typical heteroaromatic ring systems include, but are not limited to, axsindole, carbazole, [3-carboline, chromane, chromene, cinnoline, furan, imidazole, s indazole, indole, indoline, indolizine, isobenzofuran, isochromene, isoindole, isoindoline, isoquinoline, isothiazole, isoxazole, naphthyridine, oxadiazole, oxazole, perimidine, phenanthridine, phenanthroline, phenazine, phthalazine, pteridine, purine, pyran, pyrazine, pyrazole, pyridazine, pyridine, pyrimidine, pyrrole, pyrrolizine, quinazoline, quinoline, quinolizine, quinoxaline, tetrazole, thiadiazole, thiazole, thiophene, triazole, xanthene, and 1 o the like.
"Pharmaceutical composition" refers to at least one compound of Formulae (I) or (II) and a pharmaceutically acceptable vehicle, with which the compound is administered to a patient.
"Pharmaceutically acceptable salt" refers to a salt of a compound of Formulae (I) or is (II), which possesses the desired pharmacological activity of the parent compound. Such salts include: (1) acid addition salts, formed with inorganic acids such as hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid, and the like;
or formed with organic acids such as acetic acid, propionic acid, hexanoic acid, cyclopentanepropionic acid, glycolic acid, pyruvic acid, lactic acid, malonic acid, succinic acid, malic acid, malefic acid, 2o fumaric acid, tartaric acid, citric acid, benzoic acid, 3-(4-hydroxybenzoyl) benzoic acid, cinnamic acid, mandelic acid, methanesulfonic acid, ethanesulfonic acid, 1,2-ethane-disulfonic acid, 2-hydroxyethanesulfonic acid, benzenesulfonic acid, 4-chlorobenzenesulfonic acid, 2-naphthalenesulfonic acid, 4-toluenesulfonic acid, camphorsulfonic acid, 4-methylbicyclo[2.2.2]-oct-2-ene-1-carboxylic acid, glucoheptonic 2s acid, 3-phenylpropionic acid, trimethylacetic acid, tertiary butylacetic acid, lauryl sulfuric acid, gluconic acid, glutamic acid, hydroxynaphthoic acid, salicylic acid, stearic acid, muconic acid, and the like; or (2) salts formed when am acidic proton present in the parent compound is replaced by a metal ion, e.g., an alkali metal ion, an alkaline earth ion, or an aluminum ion; or coordinates with an organic base such as ethanolamine, diethanolamine, 3o triethanolamine, N-methylglucamine and the like.
"Pharmaceutically acceptable velucle" refers to a diluent, adjuvant, excipient or carrier with which a compound of Formulae (I) or (II) is administered.

"Patient" includes humans. The terms "human" and "patient" are used interchangeably herein.
"PEPTl" refers to an oligopeptide transporter protein that normally absorbs dipeptides and tripeptides (and related structures) in certain tissues, such as the intestine (Adibi, S. A., Gast~oenterology 1997,113, 332-340; Leibach et al., Anna. Rev.
Nuts. 1996, 16, 99-119).
"Preventing" or "prevention" refers to a reduction in risk of acquiring a disease or disorder (i. e., causing at least one of the clinical symptoms of the disease not to develop in a patient that may be exposed to or predisposed to the disease but does not yet experience or to display symptoms of the disease).
"Prodru " refers to a derivative of a drug molecule that requires a transformation within the body to release the active drug. Prodrugs are frequently, although not necessarily, pharmacologically inactive until converted to the parent drug. A
hydroxyl containing drug may be converted to, for example, to an ester, carbonate, acyloxyalkyl or a ~s sulfonate prodrug, which may be hydrolyzed in vivo to provide the hydroxyl compound.
Prodrugs for drugs which functional groups different than those listed above are well known to the skilled artisan.
"Promoiety" refers to a form of protecting group that when used to mask a functional group within a drug molecule converts the drug into a prodrug.
Typically, the 2o promoiety will be attached to the drug via bonds) that are cleaved by enzymatic or non-enzymatic means in vivo.
"Protecting- rgroup" refers to a grouping of atoms that when attached to a reactive functional group in a molecule masks, reduces or prevents reactivity of the functional group.
Examples of protecting groups can be found in Green et al., "Protective Groups in Organic 2s Chemistry", (Wiley, 2"d ed. 1991) and Harrison et al., "Compendium of Synthetic Organic Methods", Vols. 1-8 (John Wiley and Sons, 1971-1996). Representative amino protecting groups include, but are not limited to, formyl, acetyl, trifluoroacetyl, benzyl, benzyloxycarbonyl ("CBz"), tert-butoxycarbonyl ("Boc"), trimethylsilyl ("TMS"), 2-trimethylsilyl-ethanesulfonyl ("SES"), trityl and substituted trityl groups, 3o allyloxycarbonyl, 9-fluorenylmethyloxycarbonyl ("FMOC"), nitro-veratryloxycarbonyl ("NVOC") and the like. Representative hydroxy protecting groups include, but are not limited to, those where the hydroxy group is either acylated or allcylated such as benzyl, and trityl ethers as well as alkyl ethers, tetrahydropyranyl ethers, trialkylsilyl ethers and allyl ethers.
"Substituted" refers to a group in which one or more hydrogen atoms are independently replaced with the same or different substituent(s). Typical substituents include, but are not limited to, -M, -R6°, -O-, =O, -OR6°, -SR6°, -S-, =S, -NR6°R6i~ ~60~
-CF3, -CN, -OCN, -SCN, -NO, -NOZ, =N2, -N3, -S(O)20-, -S(O)20H, -S(O)ZR6°, -OS(02)O-, -OS(O)zp'6o~ -p(O)(O )a~ -P(O)(OR6o)(O )~ -OP(O)(OR6°)(OR61), -C(O)R6°, -C(S)R6o~
_C(O)OR60' -C(o)~6oR61' C(O)O- -C(S)~R60, -~6aC(O)~6oR61~ -~62C(S)~60R61' -~62~~63)~60R61 ~d -C(~6a)~6oR6i where M is independently a halogen;
R6°, R61, to R62 and R63 are independently hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, aryl, substituted aryl, heteroaryl or substituted heteroaryl, or optionally R6° and R61 together with the nitrogen atom to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring; and R64 and R65 are independently hydrogen, alkyl, substituted alkyl, ~s aryl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, aryl, substituted aryl, heteroaryl or substituted heteroaryl, or optionally R64 and R65 together with the nitrogen atom to which they axe bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring. Preferably, substituents include -M, -R6°, =O, -OR6°, -SR6°, -S-, =S, -~60R61~ ~60~ _CF3~ _CN, -OCN, -SCN, -NO, -NOZ, N2, -N3, -S(O)2Rso, -OS(02)O-, 20 -OS(O)2R6o, -p(O)(O )a, -P(O)(OR6°)(O ), -OP(O)(OR6°)(OR61), -C(O)R6°, -C(S)R6o -C(O)OR6°, -C(O)NR60R61'-C(~)O-~ -~62C(~)~60R61~ more preferably, -M, -R6°, =O, -OR6o~ _SR6o~ -~60R61~ -CF3~ _CN, -NO2, -S(O)2R6o~ _p(O)(OR6°)(O )~
-OP(O)(OR6°)(OR61), -C(O)R6°, -C(O)OR6°, -C(O)NR6°R61,-C(O)O-, most preferably, -M, -R6o~ =O~ _OR6°, -SR6°, -NR6°R6y -CF3~ _CN, -N02, -S(O)2R6o~ -Op(O)(OR6o)(OR6i)~
2s -C(O)R6°, -C(O)OR6° ,-C(O)O-, where R6°, R61 and R6z are as defined above.
"Transported by the PEPT1 transporter" refers to the translocation of a molecule across a membrane of a cell expressing the PEPT1 transporter. The translocation occurs through interaction with the transporter and is energized by cotransport of H+
ions across the membrane.
"Treating" or "treatment" of any disease or disorder refers to one or more of the following: (1) ameliorating the disease or disorder (i.e., arresting or reducing the development of the disease or at least one of the clinical symptoms thereof);
(2) ameliorating at least one physical parameter, which may not be discernible by the patient;

(3) inhibiting the disease or disorder, either physically, (e. g., stabilization of a discernible symptom), physiologically, (e.g., stabilization of a physical parameter), or both; and (4) delaying the onset of the disease or disorder.
"Therapeutically effective amount" means the amount of a compound or composition that, when administered to a patient, is sufficient to effect the desired therapy.
The "therapeutically effective amount" will vary depending on the compound, the disease and its severity and the age, weight, etc., of the patient to be treated.
Reference will now be made in detail to certain preferred compounds and methods of making and administering these compounds. The invention is not limited to those to preferred compounds and methods but rather is defined by the claims) issuing herefrom.
Compounds The compounds disclosed herein are prodrugs of propofol. A first class of propofol prodrugs include compounds of structural Formula (I):
O
H

( m~
O O
R O
is or a pharmaceutically acceptable salt, hydrate, solvate or N-oxide thereof, wherein:
X is selected from the group consisting of a bond, -CHZ-, -NRl l-, -O- and -S-;
m is 1 or 2;
nis0orl;
2o Rl is selected from the group consisting of hydrogen, [RSNH(CHR4)pC(O)]-, R6-, R6C(O)- and R60C(O)-;
R2 is -OR7 or -[NR8(CHR9)gC(O)OR7];
p and q are independently 1 or 2;
R3 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, 2s allcoxycarbonyl, aryl, substituted aryl, arylalkyl, carbamoyl, substituted carbamoyl, cycloallcyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
each R4 is independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, acyl, substituted acyl, alkoxycarbonyl, substituted alkoxycarbonyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, carbamoyl, substituted carbamoyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl, substituted heteroalkyl, heteroaryl, substituted heteroaryl, heteroarylalkyl and substituted heteroarylalkyl, or optionally, when R4 and RS
are attached to adj scent atoms then R4 and RS together with the atoms to which they are to bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring;
RS is selected from the group consisting of hydrogen, R6-, R6C(O)- and R60C(O)-;
R6 is selected from the group consisting of alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
~s R7 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
R8 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, 2o substituted heteroaryl and heteroarylalkyl;
each R9 is independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, acyl, substituted acyl, alkoxycarbonyl, substituted alkoxycarbonyl, axyl, substituted aryl, arylalkyl, substituted arylalkyl, carbamoyl, substituted carbamoyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, 2s substituted cycloheteroalkyl, heteroalkyl, substituted heteroalkyl, heteroaryl, substituted heteroaryl, heteroarylalkyl and substituted heteroarylalkyl, or optionally, when R8 and R9 are attached to adjacent atoms then R8 and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring;
Rl l is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, so substituted aryl, arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
with the provisos that:
when Rl is [RSNH(CHR4)pC(O)J- then Ra is -OR7;

and when RZ is -[NR8(CHR9)qC(O)OR7] then Rl is not [RSNH(CHR4)pC(O)]-.
In one embodiment, a compound of Formula (I) is derived from a-amino acids (e.g., [H2N(CHR4)C(O)OH] and/or [HNRB(CHR9)C(O)OH]) including, but not limited to, the 20 genetically encoded amino acids and the non-coded amino acids such as, for example, 2,3-diaminobutyric acid, 2,4-diaminobutyric acid, hydroxylysine, homoserine, homoarginine, homotyrosine, homocysteine, homophenylalanine, citrulline, sarcosine, orthinine, N-methylleucine, kynurenine, penicillamine, 4-aminophenylalanine, 3-(2-naphthyl)alanine, 3-(1-naphthyl)alanine, methionine sulfone, methionine sulfoxide, t-butylalanine, 4-hydroxyphenylglycine, aminoalanine, 1,2,3,4 1 o tetrahydorisoquinoline-3-carboxylic acid, vinylalanine, propargylglycine, 1,2,4-triazolo-3-alanine, 4,4,4-trifluoro-threonine, thyronine, 6-hydroxytryptophan, 5-hydroxytryptophan, 3-hydroxykynurenine, 3-aminotyrosine, trifluoromethylalanine (2-(4-pyridyl)ethyl)cysteine, 3,4-dimethoxy-phenylalanine, 3-(2-thiazolyl)alanine, ibotenic acid, quisqualic acid, 3-trifluoromethylphenylalanine, 4-trifluoromethylphenylalanine, ~s t-butylglycine, cyclopentylglycine, cyclohexylglycine, phenylglycine, cyclohexylalanine, thiohistidine, 3-methoxytyrosine, norleucine, norvaline, alloisoleucine, thioproline, dehydroproline, hydroxyproline, isonipectotic acid, homoproline, N-acetyl lysine, aminophenylbutyric acid, phenylalanines substituted at the of°tho, meta or para position of the phenyl moiety with one or two of the following: a (C1-C4) alkyl, a (C1-C4) alkoxy, 2o halogen or vitro groups or substituted with a methylenedioxy group,13-2-and 3-thienylalanine,13-2- and 3-furanylalanine, 2-, 3- and 4-pyridylalanine,13-(benzothienyl-2-and 3-yl)alanine,13-(1- and 2-naphthyl)alanine, O-sulfate, O-phosphate and O-carboxylate esters of tyrosine, 3-sulfo-tyrosine, 3-carboxy-tyrosine, 3-phospho-tyrosine, 4-methane sulfonic acid ester of tyrosine, 4-methane phosphonic acid ester of tyrosine, 2s 3,5-diiodotyrosine or 3-nitrotyrosine.
In one embodiment of a compound of Formula (I), n is 1 and R3 is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl or heteroaryl. Preferably, R3 is hydrogen, alkyl or substituted alkyl, more preferably, R3 is hydrogen or Cl_4 alkyl, even more preferably, R3 is hydrogen or methyl.
3o In another embodiment of a compound of Formula (I), n is 1 and R3 is hydrogen, aryl or substituted aryl. Preferably, R3 is hydrogen, phenyl or substituted phenyl.

In still another embodiment of a compound of Formula (I), n is 1 and R3 is hydrogen, arylalkyl or substituted arylalkyl. Preferably, R3 is hydrogen, benzyl or substituted benzyl.
In still another embodiment of a compound of Formula (I), Rl is hydrogen or [RSNH(CHR4)pC(O)]-, where p is 1. Preferably, R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl, or optionally, R4 and RS
together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
to In still another embodiment of a compound of Formula (I), Rl is [RSNH(CHR4)pC(O)]-, p is 1, RS is hydrogen and R4 is hydrogen, alkanyl or cycloalkanyl.
Preferably, R4 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl or cyclohexyl.
In still another embodiment of a compound of Formula (I), Rl is is [RSNH(CHR4)pC(O)]-, p is 1, RS is hydrogen, and R4 is substituted alkanyl.
Preferably, R4 is -CHZOH, -CH(OH)CH3, -CHZCOaH, -CHaCH2COZH, -CHaCONH2, -CH~CHZCONHa, -CHZCHZSCH3, -CHaSH, -CHZ(CHZ)3NHz or -CHZCH2CHZNHC(NH)NH2.
In still another embodiment of a compound of Formula (I), Rl is [RSNH(CHR4)pC(O)]-, p is l, R~ is hydrogen, and R4 is aryl, arylalkanyl, substituted 2o arylalkanyl or heteroarylalkanyl. Preferably, R4 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl In still another embodiment of a compound of Formula (I), Rl is [RSNH(CHR4)pC(O)]-, p is 1 and R4 and RS together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
Preferably R4 and RS
2s together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
In still another embodiment of a compound of Formula (I), Rl is [RSNH(CHR4)pC(O)]-, p is 1, R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted 3o heteroarylalkanyl, RS is R6-, R6C(O)- or R60C(O)- and R6 is alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl or heteroarylalkyl.
Preferably, R6 is Cl~
alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl.

W still another embodiment of a compound of Formula (I), RI is hydrogen or [RSNH(CHR4)pC(O)]-, where p is 2. Preferably, R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylallcanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl, or optionally, when R4 and RS are attached to adjacent atoms then R4 and RS together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
In still another embodiment of a compound of Formula (I), Rl is [RSNH(CHR4)pC(O)]-, p is 2 and R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or io substituted heteroarylalkanyl. Preferably, R4 is hydrogen, C1_4 alkyl, cyclopentyl, cyclohexyl, phenyl, substituted phenyl, benzyl or substituted benzyl.
In still another embodiment of a compound of Formula (I), Rl is [RSNH(CHR4)pC(O)]-, p is 2, RS is hydrogen and R4 is hydrogen, CI_4 alkyl, cyclopentyl, cyclohexyl, phenyl, substituted phenyl, benzyl or substituted benzyl.
is In still another embodiment of a compound of Formula (I), RZ is -OR7 and R' is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl.
Preferably, R7 is hydrogen, C1~ alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl.
In still another embodiment of a compound of Formula (I), R2 is -[NR8(CHR9)qC(O)OR7], q is l, R' is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or 2o substituted arylalkyl. Preferably, R7 is hydrogen, C1~. alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl.
In still another embodiment of a compound of Formula (I), RZ is -[NR$(CHR~)9C(O)OR7], q is 1, R8 is hydrogen and R9 is s hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, 2s heteroarylalkanyl or substituted heteroarylalkanyl. Preferably, R7 hydrogen, alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl, more preferably, R7 is hydrogen, Cl_a alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl.
In still another embodiment of a compound of Formula (I), R2 is -[NR8(CHR9)9C(O)OR7], q is l, R7 is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or 3o substituted arylalkyl, R$ is hydrogen and R9 is hydrogen, alkanyl or cycloalkanyl.
Preferably, R9 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl or cyclohexyl. Preferably, R7 is hydrogen, C1_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl.

In still another embodiment of a compound of Formula (I), Rz is -[NR$(CHR9)qC(O)OR7], q is 1, R' is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl, R8 is hydrogen and R9 is substituted alkanyl.
Preferably, R9 is -CHZOH, -CH(OH)CH3, -CH2COZH, -CHzCHzCOZH, -CHzCONHz, -CHzCHzCONHz, -CHZCH2SCH3, -CHzSH, -CHz(CHz)3NHz or -CH2CHzCHzNHC(NH)NHz. Preferably, R7 is hydrogen, Cl_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl.
In still another embodiment of a compound of Formula (I), Rz is -[NR$(CHR9)9C(O)OR7], q is 1, R' is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl, R$ is hydrogen and R9 is aryl, arylalkanyl, substituted arylalkanyl or to heteroaxylalkanyl. Preferably, R9 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl. Preferably R7 is hydrogen, Cl_4 alkyl, phenyl, substituted phenyl, berizyl or substituted benzyl.
In still another embodiment of a compound of Formula (I), Rz is -[NR8(CHR9)aC(O)OR7], q is 1, R' is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or is substituted arylalkyl and R$ and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring. Preferably Rg and R9 together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
Preferably, R7 is hydrogen, C1_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl.
2o In still another embodiment of a compound of Formula (I), Rz is -[NR8(CHR9)qC(O)OR7], q is 2, R7 is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl and R9 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl. Preferably, R' is hydrogen, Cl_4 alkyl, phenyl, substituted phenyl, benzyl 2s or substituted benzyl. Preferably, R8 is hydrogen and R9 is hydrogen, C1_4 alkyl, cyclopentyl, cyclohexyl, phenyl, substituted phenyl, benzyl or substituted benzyl.
In still another embodiment of a compound of Formula (I), m is l, n is 0, X is a bond, Rl is [RSNH(CHR4)pC(O)]-, p is 1, RS is hydrogen, Rz is -OR7, R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, 3o cycloalkanyl, heteroaxylalkanyl or substituted heteroarylalkanyl and R7 is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl. Preferably, R7 is hydrogen, C1_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R7 is hydrogen.

In still another embodiment of a compound of Formula (I), m is 1, n is 0, X is a bond, Rl is [RSNH(CHR4)pC(O)]-, p is l, RS is hydrogen and R2 is -OH to provide a compound of Formula (III):

O O
O
where R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl.
In one embodiment of a compound of Formula (III), R~ is hydrogen, alkanyl, or cycloalkanyl. Preferably, R4 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, to cyclopentyl or cyclohexyl.
In another embodiment of a compound of Formula (III), R4 is substituted alkanyl.
Preferably, R4 is -CH20H, -CH(OH)CH3, -CH2C02H, -CH2CH2C02H, -CHZCONH2, -CH2CHZCONH2, -CHZCH2SCH3, -CH2SH, -CHZ(CH2)3NH2 or -CHzCH2CH2NHC(NH)NHZ.
is In still another embodiment of a compound of Formula (III), R4 is aryl, arylalkanyl, substituted arylalkanyl or heteroarylalkanyl. Preferably, R4 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl.
In still another embodiment of a compound of Formula (III), the a-carbon of the N-terminal amino acid residue is of the L-configuration. In still another embodiment of a 2o compound of Formula (III), the a,-carbon of the N-terminal amino acid residue is of the D-configuration. hi still another embodiment of a compound of Formula (III), the a-carbon of the C-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (III), the a-carbon of the C-terminal amino acid residue is of the D-configuration. In still another embodiment of a compound of Formula (III), the 2s a-carbons of both the N- and C-terminal amino acid residues are of the L-configuration.

In still another embodiment of a compound of Formula (I), m is 2, n is 0, X is a bond, R' is [RSNH(CHR4)pC(O)]-, p is l, RS is hydrogen, RZ is -OR7, R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, axylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl and R7 is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl. Preferably, R7 is hydrogen, C1_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R7 is hydrogen.
In still another embodiment of a compound of Formula (I), m is 2, n is 0, X is a bond, Rl is [RSNH(CHR4)pC(O)]-, p is 1, RS is hydrogen and RZ is -OH to provide a compound of Formula (IV):
R~
H

O
O O
(IV) \
where R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl.
is In one embodiment of a compound of Formula (IV), R4 is hydrogen, alkanyl or cycloalkanyl. Preferably, R4 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl or cyclohexyl.
In another embodiment of a compound of Formula (IV), R4 is substituted alkanyl.
Preferably, R4 is -CHZOH, -CH(OH)CH3, -CH2C02H, -CHzCHZCOaH, -CHaCONHa, zo -CH2CH2CONH2, -CH2CHZSCH3, -CH2SH, -CHZ(CH2)3NHZ or -CH2CH2CHZNHC(NH)NH2.
In still another embodiment of a compound of Formula (IV), R4 is aryl, arylalkanyl, substituted arylalkanyl or heteroarylalkanyl. Preferably, R4 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl.
2s In still another embodiment of a compound of Formula (IV), the a-carbon of the N-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (IV), the a-carbon of the N-terminal amino acid residue is of the D-configuration. In still another embodiment of a compound of Formula (IV), the a-carbon of the C-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (IV), the a-carbon of the C-terminal amino acid residue is of the s D-configuration. In still another embodiment of a compound of Formula (IV), the a-carbons of both the N- and C-terminal amino acid residues are of the L-configuration.
In still another embodiment of a compound of Formula (I), m is 1, n is 0, X is -O-, Rl is [RSNH(CHR4)pC(O)~-, p is l, R5 is hydrogen, R2 is -OR7, R4 is hydrogen, allcanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, ~o heteroarylalkanyl or substituted heteroarylalkanyl and R' is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl. Preferably, R7 is hydrogen, C1_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R7 is hydrogen.
In still another embodiment of a compound of Formula (I), m is l, n is 0, X is -O-, Rl is [RSNH(CHR4)pC(O)~-, p is l, RS is hydrogen and R2 is -OH to provide a compound of is Formula (V):

O
O
O O
(V) / ~ w where R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl.
2o In one embodiment of a compound of Formula (V), R4 is hydrogen, alkanyl or cycloalkanyl. Preferably, R4 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl or cyclohexyl.
In another embodiment of a compound of Formula (V), R4 is substituted alkanyl.
Preferably, R4 is -CH~OH, -CH(OH)CH3, -CH2C02H, -CHZCH2COZH, -CH2CONH2, 2s -CHZCH2CONH2, -CHaCH2SCH3, -CHaSH, -CHZ(CHZ)3NH2 or -CHZCHZCHaNHC(NH)NH2.

In still another embodiment of a compound of Formula (V), R4 is aryl, arylalkanyl, substituted axylalkanyl or heteroarylalkanyl. Preferably, R4 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl.
In still another embodiment of a compound of Formula (V), the oc-carbon of the N-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (V), the a-carbon of the N-terminal amino acid residue is of the D-configuration. In still another embodiment of a compound of Formula (V), the oc-carbon of the C-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (V), the a-carbon of the C-terminal amino acid residue is of the m D-configuration. In still another embodiment of a compound of Formula (V), the a,-carbons of both the N- and C-terminal amino acid residues are of the L-configuration.
In still another embodiment of a compound of Formula (I), m is 1, n is 0, X is -S-, Rl is [RSNH(CHR4)pC(O)]-, p is 1, RS is hydrogen, R2 is -OR7, R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, ~s heteroarylalkanyl or substituted heteroarylalkanyl and R' is hydrogen, alkyh, aryl, substituted aryl, arylalkyl or substituted arylalkyl. Preferably, R7 is hydrogen, C1_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R' is hydrogen.
In still another embodiment of a compound of Formula (I), m is l, n is 0, X is -S-, Rl is [RSNH(CHR4)pC(O)]-, p is 1, RS is hydrogen and R2 is -OH to provide a compound of 2o Formula (VI):

O
S
O' _O
/ w (VI) where R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl.

In one embodiment of a compound of Formula (VI), R4 is hydrogen, alkanyl, or cycloalkanyl. Preferably, R4 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl or cyclohexyl.
In another embodiment of a compound of Formula (VI), R4 is substituted alkanyl.
Preferably, R4 is -CHZOH, -CH(OH)CH3, -CH2COaH, -CHZCHZC02H, -CH2CONHz, -CHaCHaCONHz, -CHZCHZSCH3, -CH2SH, -CHz(CHz)3NHz or -CH2CH2CHzNHC(NH)NHz.
In still another embodiment of a compound of Formula (VI), R4 is aryl, arylalkanyl, substituted arylalkanyl or heteroarylalkanyl. Preferably, R4 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl.
In still another embodiment of a compound of Formula (VI), the a-carbon of the N-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (VI), the a-carbon of the N-terminal amino acid residue is of the D-configuration. In still another embodiment of a compound of Formula (VI), the a-carbon is of the C-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (Vl), the a-carbon of the C-terminal amino acid residue is of the D-configuration. In still another embodiment of a compound of Formula (VI), the a-carbons of both the N- and C-terminal amino acid residues are of the L-configuration.
In still another embodiment of a compound of Formula (I), m is l, n is 1, X is a 2o bond, Rl is [RSNH(CHR4)pC(O)~-, p is l, RS is hydrogen, Rz is -OR7, R3 is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl or heteroaryl, R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl and R7 is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl. Preferably, R3 is hydrogen, C1_4 2s alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl. More preferably, R3 is hydrogen or methyl. Preferably, R' is hydrogen, C1_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R' is hydrogen.

In still another embodiment of a compound of Formula (I), m is 1, n is 1, X is a bond, Rl is [RSNH(CHR4)pC(O)]-, p is l, RS is hydrogen and R2 is -OH to provide a compound of Formula (VII):

O O
O\ /R3 O
(VII) where R3 is hydrogen or methyl and R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl.
In one embodiment of a compound of Formula (VII), R4 is hydrogen, alkanyl, or to cycloalkanyl. Preferably, R4 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl or cyclohexyl.
In another embodiment of a compound of Formula (VII), R4 is substituted alkanyl.
Preferably, R4 is -CH20H, -CH(OH)CH3, -CH2CO~H, -CH2CHZCO2H, -CHZCONH2, -CH~CHZCONH2, -CHaCHZSCH3, -CHZSH, -CH2(CHZ)3NH2 or is -CH2CHZCHaNHC(NH)NH2.
In still another embodiment of a compound of Formula (VII), R4 is aryl, arylalkanyl, substituted arylalkanyl or heteroarylalkanyl. Preferably, R4 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl.
In still another embodiment of a compound of Formula (VII), the a-carbon of the 2o N-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (VII), the cc-carbon of the N-terminal amino acid residue is of the D-configuration. In still another embodiment of a compound of Formula (VII), the a-carbon of the C-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (VII), the a,-carbon of the C-terminal amino acid 2s residue is of the D-configuration. In still another embodiment of a compound of Formula (VII), the a,-carbons of both the N- and C-terminal amino acid residues are of the L-configuration. In still another embodiment of a compound of Formula (VII), R3 is hydrogen.
In still another embodiment of a compound of Formula (I), m is 2, n is 1, X is a s bond, Rl is [RSNH(CHR4)pC(O)]-, p is 1, RS is hydrogen, RZ is -OR7, R3 is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl or heteroaryl, R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl and R' is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl. Preferably, R3 is hydrogen, C1_4 io alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R3 is hydrogen or methyl. Preferably, R7 is hydrogen, Cl_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R7 is hydrogen.
In still another embodiment of a compound of Formula (I), m is 2, n is 1, X is a bond, Rl is [RSNH(CHR4)pC(O)]-, p is l, RS is hydrogen and Ra is -OH to provide a is compound of Formula (VIII):

O
O O
R3' _ O
/ w (viii) w where R3 is hydrogen or methyl and R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl.
2o In one embodiment of a compound of Formula (VIII), R4 is hydrogen, alkanyl or cycloalkanyl. Preferably, R4 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl or cyclohexyl.
In another embodiment of a compound of Formula (VIII), R4 is substituted alkanyl.
Preferably, R4 is -CH20H, -CH(OH)CH3, -CHZCOZH, -CH2CHaC02H, -CHZCONH2, 2s -CHzCH2CONHz, -CH2CHaSCH3, -CHZSH, -CHZ(CHz)3NH2 or -CH2CHZCHZNHC(NH)NH2.
In still another embodiment of a compound of Formula (VIII), R4 is aryl, arylalkanyl, substituted arylalkanyl or heteroarylalkanyl. Preferably, R4 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl.
In still another embodiment of a compound of Formula (VIII), the a-carbon of the N-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (VIII), the a-carbon of the N-terminal amino acid residue is of the D-configuration. In still another embodiment of a compound of Formula (VIII), the a-carbon of the C-terminal amino acid residue is of the L-configuration. In still another to embodiment of a compound of Formula (VIII), the a-carbon of the C-terminal amino acid residue is of the D-configuration. In still another embodiment of a compound of Formula (VIII), the a-carbons of both the N- and C-terminal amino acid residues are of the L-configuration. In still another embodiment of a compound of Formula (VIII), R3 is hydrogen. In still another embodiment of a compound of Formula (VIII), R3 is hydrogen.
is In still another embodiment of a compound of Formula (I), m is 1, n is 0, X
is a bond, Rl is selected from the group consisting of hydrogen, R6-, R6C(O)- and R60C(O)-, RZ
is -[NR8(CHR9)gC(O)OR7], q is 1, R6 is alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl, R7 is alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl, R$ is hydrogen or alkyl, R~ is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, 2o substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl, or optionally, R8 and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring. Preferably, Rl is hydrogen.
Preferably, R6 is Cl_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl.
Preferably, R7 is hydrogen, C1_4 alkyl, phenyl, substituted phenyl, benzyl or substituted 2s benzyl, more preferably, R7 is hydrogen.
In still another embodiment of a compound of Formula (I), m is 1, n is 0, X is a bond, RI is hydrogen, RZ is -[NR8(CHR9)aC(O)OR7], q is l, R7 is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl, R$ is hydrogen or alkyl, R9 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, 3o cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl, or optionally, R8 and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring. Preferably, R7 is hydrogen, C1~ alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R7 is hydrogen.

In still another embodiment of a compound of Formula (I), m is 1, n is 0, X is a bond, Rl is hydrogen, R2 is -[NR8(CHR9)qC(O)OR7], q is l and R7 is hydrogen to provide a compound of Formula (IX):
O
Ra O Rs (IX) where R8 is hydrogen or methyl and R9 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl, or optionally, R8 and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
W one embodiment of a compound of Formula (IX), R9 is hydrogen, alkanyl or 1o cycloalkanyl. Preferably, R~ is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl or cyclohexyl.
In another embodiment of a compound of Formula (IX), R9 is substituted alkanyl.
Preferably, R9 is -CH20H, -CH(OH)CH3, -CH2COZH, -CHaCH2COZH, -CHZCONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CH2(CHZ)3NH2 Or is -CH2CH2CHZNHC(NH)NH2.
In still another embodiment of a compound of Formula (IX), R9 is aryl, arylalkanyl, substituted arylalkanyl or heteroarylalkanyl. Preferably, R9 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl.
In still another embodiment of a compound of Formula (IX), R8 and R9 together 2o with the atoms to which they are bonded form a cycloheteroall~yl or substituted cycloheteroalkyl ring. Preferably, R8 and R9 together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
In still another embodiment of a compound of Formula (IX), the a-carbon of the N-terminal amino acid residue is of the L-configuration. In still another embodiment of a 2s compound of Formula (IX), the a-carbon of the N-terminal amino acid residue is of the I?-configuration. In still another embodiment of a compound of Formula (IX), the a-carbon of the C-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (IX), the a-carbon of the C-terminal amino acid residue is of the D-configuration. In still another embodiment of a compound of Formula (IX), the a,-carbons of both the N- and C-terminal amino acid residues are of the L-configuration. In still another embodiment of a compound of Formula (IX), R8 is hydrogen.
In still another embodiment of a compound of Formula (I), m is 2, n is 0, X is a bond, Rl is hydrogen, R2 is -[NR8(CHR9)qC(O)OR7], q is 1, R7 is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl, R$ is hydrogen or alkyl, R9 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, io cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl or optionally, R8 and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring. Preferably, R7 is hydrogen, C1_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R7 is hydrogen.
In still another embodiment of a compound of Formula (I), m is 2, n is 0, X is a is bond, Rl is hydrogen, R2 is -[NR8(CHR9)qC(O)OR7], q is 1 and R7 is hydrogen to provide a compound of Formula (X):
O O
R$

(X) R8 is hydrogen or methyl and R9 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or 2o substituted heteroarylalkanyl, or optionally, R8 and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
hi one embodiment of a compound of Formula (X), R9 is hydrogen, alkanyl or cycloalkanyl. Preferably, R9 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl or cyclohexyl.

In another embodiment of a compound of Formula (X), R9 is substituted alkanyl.
Preferably, R9 is -CHZOH, -CH('OH)CH3, -CHZCOZH, -CHzCHaCOaH, -CHZCONHa, -CH2CHZCONH2, -CHZCHZSCH3, -CHaSH, -CHZ(CHZ)3NH2 or -CHZCHZCHZNHC(NH)NHZ.
In still another embodiment of a compound of Formula (X), R9 is aryl, arylalkanyl, substituted arylalkanyl or heteroarylallcanyl. Preferably, R9 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolyhnethyl.
In still another embodiment of a compound of Formula (X), R8 and R9 together with the atoms to which they are bonded form a cycloheteroallcyl or substituted cycloheteroalkyl i o ring. Preferably, Rg and R9 together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
In still another embodiment of a compound of Formula (X), the a-carbon of the N-terminal amino acid residue is of the L-configuration. W still another embodiment of a compound of Formula (X), the a-carbon of the N-terminal amino acid residue is of the is D-configuration. In still another embodiment of a compound of Formula (X), the a-carbon of the C-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (X), the a-carbon of the C-terminal amino acid residue is of the D-configuration. In still another embodiment of a compound of Formula (X), the a-carbons of both the N- and C-terminal amino acid residues are of the L-configuration.
In still 2o another embodiment of a compound of Formula (X), R3 is hydrogen. In still another embodiment of a compound of Formula (X), R$ is hydrogen.
In still another embodiment of a compound of Formula (I), m is l, n is 1, X is a bond, Rl is hydrogen, R2 is -[NR8(CHR9)qC(O)OR7], q is l, R3 is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl or heteroaryl, R' is hydrogen, 2s alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl or heteroarylalkyl, R8 is hydrogen or methyl, R~ is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl, or optionally, R8 and R9 together with the atoms to which they so are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
Preferably, R3 is hydrogen, C1_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl. More preferably, R3 is hydrogen or methyl. Preferably R7 is hydrogen, C1~ alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl. More preferably, R7 is hydrogen.

In still another embodiment of a compound of Formula (I), m is 1, n is l, X is a bond, Rl is hydrogen, R2 is -[NR8(CHR9)qC(O)OR7], q is 1 and R7 is hydrogen to provide a compound of Formula (XI):
\ _ O
R3~p Rs (XI ) where R3 is hydrogen or methyl, R8 is hydrogen or methyl and R9 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloallcanyl, heteroarylalkanyl or substituted heteroarylalkanyl, or optionally, R$ and R9 together with the atoms to which they are bonded, form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
In one embodiment of a compound of Formula (XI), R9 is hydrogen, alkanyl or cycloalkanyl. Preferably, R9 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl or cyclohexyl.
In another embodiment of a compound of Formula (XI), R9 is substituted alkanyl.
Preferably, R9 is -CHZOH, -CH(OH)CH3, -CHZCOZH, -CHZCHZC02H, -CH2CONH2, is -CH2CHZCONH2, -CHZCH2SCH3, -CHaSH, -CHZ(CH2)3NH2 or -CHZCH2CH2NHC(NH)NHZ.
In still another embodiment of a compound of Formula (XI), R~ is aryl, arylalkanyl, substituted arylalkanyl or heteroarylalkanyl. Preferably, R9 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl.
2o In still another embodiment of a compound of Formula (XI), R8 and R~
together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring. Preferably, R$ and R9 together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
In still another embodiment of a compound of Formula (XI), the a-carbon of the 2s N-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (XI), the a-carbon of the N-terminal amino acid residue is of the D-configuration. In still another embodiment of a compound of Formula (XI), the a-carbon of the C-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (XI), the a-carbon of the C-terminal amino acid residue is of the s D-configuration. In still another embodiment of a compound of Formula (XI), the a-carbons of both the N- and C-terminal amino acid residues are of the L-configuration. In still another embodiment of a compound of Formula (XI), R3 is hydrogen. In still another embodiment of a compound of Formula (XI), R8 is hydrogen.
In still another embodiment of a compound of Formula (I), m is 1, n is 0, X is a to bond, Rl is hydrogen, RZ is -OR7 and R7 is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl. Preferably, R7 is hydrogen, Cl_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R' is hydrogen.
In still another embodiment of a compound of Formula (I), m is 1, n is 0, X is a bond, Rl is hydrogen, R2 is -OR7 and R7 is hydrogen to provide a compound of Formula Is (XII):
O \
(XI I ) In one embodiment of a compound of Formula (XII), the a-carbon of the amino acid residue is of the L-configuration. In another embodiment of a compound of Formula (XII), the a-carbon of the amino acid residue is of the D-configuration.
20 In still another embodiment of a compound of Formula (I), m is 2, n is 0, X
is a bond, Rl is hydrogen, R~ is -OR7 and R' is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl. Preferably, R7 is hydrogen, C1_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R7 is hydrogen.
In still another embodiment of a compound of Formula (I), m is 2, n is 0, X is a 2s bond, RI is hydrogen, Rz is -OR7 and R7 is hydrogen to provide a compound of Formula (XIII):

O

O~ O
(X111) In one embodiment of a compound of Formula (XIII), the a-carbon of the amino acid residue is of the L-configuration. In another embodiment of a compound of Formula (XIII), the a-carbon of the amino acid residue is of the D-configuration.
In still another embodiment of a compound of Formula (I), m is 1, n is 1, X is a bond, Rl is hydrogen, Ra is -OR7, R3 is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl or heteroaryl and R' is hydrogen, alkyl, aryl, substituted aryl, axylalkyl or substituted arylalkyl. Preferably, R3 is hydrogen, Cl_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R3 is hydrogen or methyl.
to Preferably, R7 is hydrogen, C1_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R7 is hydrogen.
In still another embodiment of a compound of Formula (I), m is 1, n is l, X is a bond, Rl is hydrogen, R2 is -OR7 and R7 is hydrogen to provide a compound of Formula (XIV):

O
O\ /R3 O
(XIV) wherein R3 is hydrogen or methyl.
In one embodiment of a compound of Formula (XIV), the a-carbon of the amino acid residue is of the L-configuration. W another embodiment of a compound of Formula (XIV), the a-carbon of the amino acid residue is of the D-configuration.

In still another embodiment of a compound of Formula (I), m is 2, n is l, X is a bond, Rl is hydrogen, R2 is -OR7, R3 is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl or heteroaryl and R7 is hydrogen, alkyl, aryl, substituted aryl, arylalkyl or substituted arylalkyl. Preferably, R3 is hydrogen, Cl~ alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R3 is hydrogen or methyl.
Preferably, R7 is hydrogen, C1_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R' is hydrogen.
In still another embodiment of a compound of Formula (I), m is 2, n is 1, X is a bond, Rl is hydrogen, RZ is -OR7 and R' is hydrogen to provide a compound of Formula io (XV):

O O
R~O
(XV) wherein R3 is hydrogen or methyl.
In one embodiment of a compound of Formula (XIV), the a-carbon of the amino acid residue is of the L-configuration. In another embodiment of a compound of Formula is (XI~, the a-carbon of the amino acid residue is of the D-configuration.
Another class of propofol prodrugs include compounds of structural Formula (II):
Rs O Ra R~~N q O O
R9 ~- n (ii) or a pharmaceutically acceptable salt, hydrate, solvate or N-oxide thereof, wherein:
Rl° is hydrogen or [RSNH(CHR4)pC(O)]-;
2o nis0orl;
p and q are independently 1 or 2;

R3 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkoxycarbonyl, aryl, substituted aryl, arylalkyl, carbamoyl, substituted carbamoyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
each R4 is independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, acyl, substituted acyl, alkoxycarbonyl, substituted alkoxycarbonyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, carbamoyl, substituted carbamoyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl, substituted heteroalkyl, heteroaryl, substituted to heteroaryl, heteroarylalkyl and substituted heteroarylalkyl, or optionally, when R4 and RS
are attached to adj acent atoms then R4 and RS together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring;
RS is selected from the group consisting of hydrogen, R6-, R6C(O)- and R60C(O)-;
R6 is selected from the group consisting of alkyl, substituted allcyl, aryl, substituted is aryl, arylalkyl, substituted arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
R$ is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
2o each R9 is independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, acyl, substituted aryl, alkoxycarbonyl, substituted alkoxycarbonyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, carbamoyl, substituted carbamoyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl, substituted heteroalkyl, heteroaryl, substituted 2s heteroaryl, heteroarylalkyl and substituted heteroarylalkyl, or optionally, when R$ and R9 are attached to adj acent atoms then R8 and R~ together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring:
with the proviso that when Rl° is hydrogen then n is 1.
In one embodiment, a compound of Formula (II) is derived from a-amino acids so (e.g., [HZN(CHR4)C(O)OH] andlor [HNRg(CHR9)C(O)OH]) including, but not limited to, the 20 genetically encoded amino acids and the non-coded amino acids 2,3-diaminobutyric acid, 2,4-diaminobutyric acid, hydroxylysine, homoserine, homoarginine, homotyrosine, homocysteine, homophenylalanine, citrulline, sarcosine, orthinine, N-methylleucine, kynurenine, penicillamine, 4-aminophenylalanine, 3-(2-naphthyl)alanine, 3-(1-naphthyl)alanine, methionine sulfone, methionine sulfoxide, t-butylalanine, 4-hydroxyphenylglycine, aminoalanine, 1,2,3,4 tetrahydorisoquinoline-3-carboxylic acid, s vinylalanine, propargylglycine, 1,2,4-triazolo-3-alanine, 4,4,4-trifluoro-threonine, thyronine, 6-hydroxytryptophan, 5-hydroxytryptophan, 3-hydroxykynurenine, 3-aminotyrosine, trifluoromethylalanine (2-(4-pyridyl)ethyl)cysteine, 3,4-dimethoxy-phenylalanine, 3-(2-tluazolyl)alanine, ibotenic acid, quisqualic acid, 3-trifluoromethylphenylalanine, 4-trifluoromethylphenylalanine, t-butylglycine, cyclopentylglycine, cyclohexylglycine, phenylglycine, cyclohexylalanine, thiohistidine, 3-methoxytyrosine, norleucine, norvaline, alloisoleucine, thioproline, dehydroproline, hydroxyproline, isonipectotic acid, homoproline, N-acetyl lysine, aminophenylbutyric acid, phenylalanines substituted at the o~tho, meta or para position of the phenyl moiety with one or two of the following: a (C1-C4) alkyl, a (C1-C4) alkoxy, halogen or nitro groups or is substituted with a methylenedioxy group,13-2- and 3-thienylalanine, l3-2-and 3-furanylalanine, 2-, 3- and 4-pyridylalanine,13-(benzothienyl-2- and 3-yl)alanine,13-(1- and 2-naphthyl)alanine, O-sulfate, O-phosphate and O-carboxylate esters of tyrosine, 3-sulfo-tyrosine, 3-carboxy-tyrosine, 3-phospho-tyrosine, 4-methane sulfonic acid ester of tyrosine, 4-methane phosphoric acid ester of tyrosine, 3,5-diiodotyrosine and 20 3-nitrotyrosine.
In one embodiment of a compound of Formula (II), n is 1 and R3 is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl or heteroaryl. In another embodiment, n is 1 and R3 is hydrogen, alkyl or substituted alkyl. Preferably, R3 is hydrogen or C1_4 alkyl.
2s In still another embodiment of a compound of Formula (II), n is l and R3 is hydrogen, aryl or substituted aryl. Preferably, R3 is hydrogen, phenyl or substituted phenyl.
In still another embodiment of a compound of Formula (II), n is 1 and R3 is hydrogen, arylallcyl or substituted arylalkyl. Preferably, R3 is hydrogen, benzyl or substituted benzyl.
so In still another embodiment of a compound of Formula (II), Rl° is [RSNH(CHR4)pC(O)]-, p is 1 and R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl, or optionally, R4 and RS together with the atoms to which they are bonded, form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
In still another embodiment of a compound of Formula (II), Rl° is [RSNH(CHR4)pC(O)]-, p is 1, RS is hydrogen and R4 is hydrogen, alkanyl or cycloalkanyl.
Preferably, R4 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl or cyclohexyl.
In still another embodiment of a compound of Formula (II), Rl° is [RSNH(CHR4)pC(O)]-, p is 1, RS is hydrogen and R4 is substituted alkanyl.
Preferably, R4 is -CHzOH, -CH(OH)CH3, -CH2C02H, -CHzCH2C02H, -CHZCONHz, -CH2CHzCONHz, -CH2CHzSCH3, -CHZSH, -CHz(CHz)3NHz or -CHzCH2CHzNHC(NH)NHz.
In still another embodiment of a compound of Formula (II), Rl° is [RSNH(CHR4)pC(O)]-, p is 1, RS is hydrogen and R4 is aryl, arylalkanyl, substituted arylalkanyl or heteroarylalkanyl. Preferably, R4 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl.
~s In still another embodiment of a compound of Formula (II), Rl° is [RSNH(CHR4)pC(O)]-, p is 1 and R4 and RS together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
Preferably, R4 and RS
together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
2o In still another embodiment of a compound of Formula (II), Rl° is [RSNH(CHR4)pC(O)]-, p is 1, R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkyl or substituted heteroarylalkyl, RS is R6-, R6C(O)- or R6OC(O)-, and R6 is alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, cycloalkyl, substituted cycloalkyl, 2s cycloheteroalkyl, heteroaryl, substituted heteroaryl or heteroarylalkyl.
Preferably R6 is selected from the group consisting of Cl_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl.
In still another embodiment of a compound of Formula (II), Rl° is [RSNH(CHR4)pC(O)]-, p is 2 and each R4 is independently hydrogen, alkanyl, substituted 3o alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl. Preferably, each R4 is independently hydrogen, Cl_4 alkyl, cyclopentyl, cyclohexyl, phenyl, substituted phenyl, benzyl or substituted benzyl. More preferably, Rl° is [RSNH(CHR4)pC(O)]-, p is 2, RS is hydrogen, 3~

and each R4 is independently hydrogen, C1_4 alkyl, cyclopentyl, cyclohexyl, phenyl, substituted phenyl, benzyl or substituted benzyl.
In still another embodiment of a compound of Formula (II), q is 1, R8 is hydrogen or methyl and R9 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl.
In still another embodiment of a compound of Formula (II), q is l, R8 is hydrogen or methyl and Rg is hydrogen, alkanyl or cycloalkanyl. Preferably, R9 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl or cyclohexyl.
In still another embodiment of a compound of Formula (II), q is 1, R$ is hydrogen or to methyl and R9 is substituted alkanyl. Preferably, R9 is -CHZOH, -CH(OH)CH3, -CH2C02H, -CH2CHZC02H, -CH2CONHz, -CH2CH2CONH2, -CHZCHZSCH3, -CH2SH, -CHZ(CH2)3NH2 Or -CH2CHaCH2NHC(NH)NH2.
In still another embodiment of a compound of Formula (II), q is 1, R$ is hydrogen or methyl and R9 is aryl, arylalkanyl, substituted arylalkanyl or heteroarylalkanyl. Preferably, is R9 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylinethyl.
In still another embodiment of a compound of Formula (II), q is l, and R8 and together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring. Preferably R8 and R9 together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
2o In still another embodiment of a compound of Formula (II), q is 2, R$ is hydrogen or methyl and each R9 is independently hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl. More preferably, R8 is hydrogen and each R9 is independently hydrogen, Cl_4 alkyl, cyclopentyl, cyclohexyl, phenyl, substituted phenyl, benzyl or substituted benzyl.
2s In still another embodiment of a compound of Formula (II), n is 0, q is 1, Rl° is [RSNH(CHR4)pC(O)]-, p is 1, and RS is hydrogen to provide a compound of Formula (XVI):

p Rs (XVI) O ~ \
N _ O

wherein R4 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl, R8 is hydrogen or methyl and R9 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, s heteroarylalkanyl or substituted heteroarylalkanyl, or optionally, Rs and R9 together with the atoms to which they are bonded, form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
In one embodiment of a compound of Formula (XVI), R$ is hydrogen and R9 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH20H, -CH(OH)CH3, -CHzCOZH, -CH2CH2COzH, -CHZCONHz, -CH2CHzCONHz, -CHzCH2SCH3, -CH2SH, -CHz(CHz)3NHz, -CH2CHZCHzNHC(NH)NHz, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl, 3-indolylmethyl, or optionally, Rg and R9 together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
In another embodiment of a compound of Formula (XVI), R4 is hydrogen, alkanyl or Is cycloalkanyl. Preferably, R4 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl or cyclohexyl. Preferably, R$ is hydrogen and R9 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CHZOH, -CH(OH)CH3, -CHZCOZH, -CH2CHzC02H, -CHZCONHz, -CHzCHzCONHz, -CHzCH2SCH3, -CH2SH, -CHz(CHz)3NHz, -CHzCH2CHzNHC(NH)NHz, phenyl, benzyl, 4-hydroxybenzyl, 20 4-imidazolylmethyl or 3-indolylinethyl, or optionally, R$ and R9 together with the atoms to which they are bonded, form an azetidine, pyrrolidine or piperidine ring.
In still another embodiment of a compound of Formula (XVI), R4 is substituted alkanyl. Preferably, R4 is -CHzOH, -CH(OH)CH3; -CHZCOZH, -CH2CH2COZH, -CHzCONHz, -CH2CH2CONHz, -CH2CH2SCH3, -CHZSH, -CHz(CHz)3NHz or 2s -CHzCHzCHzNHC(NH)NHz. Preferably, R$ is hydrogen and R9 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CHzOH, -CH(OH)CH3, -CH2COzH, -CHZCH2C02H, -CHzCONHz, -CHzCHzCONHz, -CHzCH2SCH3, -CHzSH, -CHz(CHz)3NHz, -CHZCH2CHzNHC(NH)NHz, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl, or optionally, R$
3o and R~ together with the atoms to which they are bonded, form an azetidine, pyrrolidine or piperidine ring.
In still another embodiment of a compound of Formula (XVI), R4 is aryl, axylalkanyl, substituted arylalkanyl or heteroarylalkanyl. Preferably, R4 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl. Preferably, R8 is hydrogen and R9 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CHZOH, -CH(OH)CH3, -CHZCOZH, -CHaCHZC02H, -CHZCONHz, -CH2CHZCONHz, -CHZCHZSCH3, -CH2SH, -CH2(CHZ)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, s 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl or optionally, R8 and R9 together with the atoms to which they are bonded, form an azetidine, pyrrolidine or piperidine ring.
In still another embodiment of a compound of Formula (XVI), the a-carbon of the N-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (XVI), the a-carbon of the N-terminal amino acid residue is of the D-configuration. In still another embodiment of a compound of Formula (XVI), the a-carbon of the C-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (XVI), the a-carbon of the C-terminal amino acid residue is of the D-configuration. In still another embodiment of a compound of Formula (XVI), the a-carbons of both the N- and C-terminal amino acid residues are of the 15 L-configuration.
In still another embodiment of a compound of Formula (II), n is 1, q is l, Rl° is hydrogen, R3 is hydrogen, allcyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl or heteroaryl, R$ is hydrogen, R9 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or 2o substituted heteroarylalkanyl, or optionally, R$ and R9 together with the atoms to which they are bonded, form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
Preferably, R3 is hydrogen, C1_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R3 is hydrogen or methyl.
In still another embodiment of a compound of Formula (II), n is 1, q is 1, and Rl° is 2s hydrogen, to provide a compound of Formula (XVII):

,N ~ ( /
H ~O O

(XViI) wherein R3 is hydrogen or methyl, Rg is hydrogen or methyl and R9 is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl, or optionally, R$ and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring. Preferably, in a compound of Formula (XVII), Rg is hydrogen.
In one embodiment of a compound of Formula (XVII), R9 is hydrogen, alkanyl or cycloalkanyl. Preferably, R9 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl or cyclohexyl.
In another embodiment of a compound of Formula (XVII), R9 is substituted alkanyl.
Preferably, R9 is -CHZOH, -CH(OH)CH3, -CH2COZH, -CH~CH2C02H, -CHZCONHZ, -CH2CH2CONH2, -CHZCHZSCH3, -CHZSH, -CHZ(CH2)3NH2 or io -CH2CH2CH2NHC(NH)NH2.
In still another embodiment of a compound of Formula (XVII), R9 is aryl, arylalkanyl, substituted arylalkanyl or heteroarylalkanyl. Preferably, R9 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylrnethyl or 3-indolylmethyl.
In still another embodiment of a compound of Formula (XVII), Rg and R9 together is with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring. Preferably, R8 and R9 together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
In one embodiment of a compound of Formula (XVII), the a-carbon of the amino acid residue is of the L-configuration. In another embodiment of a compound of Formula zo (XVII), the a-carbon of the amino acid residue is of the D-configuration.
In still another embodiment of a compound of Formula (XVII), R3 is hydrogen.
In still another embodiment of a compound of Formula (II), n is l, q is l, Rl° is [RSNH(CHR4)pC(O)]-, p is 1, R3 is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl or heteroaryl, R4 is hydrogen, alkanyl, substituted alkanyl, aryl, 2s substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl, RS is hydrogen, R8 is hydrogen or methyl, R~ is hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalleanyl, heteroarylalkanyl or substituted heteroarylalkanyl, or optionally, R8 and R9 together with the atoms to which they are bonded, form a cycloheteroalkyl or substituted 3o cycloheteroalkyl ring. Preferably R3 is hydrogen, C1_4 alkyl, phenyl, substituted phenyl, benzyl or substituted benzyl, more preferably, R3 is hydrogen or methyl.
Preferably, R$ is hydrogen and R~ is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CHZOH, -CH(OH)CH3, -CH~COZH, -CHaCH2COZH, -CHZCONHZ, -CHZCH2CONH2, -CHZCH2SCH3, -CH2SH, -CH2(CHZ)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylinethyl or optionally, Rg and R9 together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
In still another embodiment of a compound of Formula (II), n is l, q is l, Rl° is [RSNH(CHR4)pC(O)]-, p is l, and RS is hydrogen to provide a compound of Formula (XVIII):
R4 ~ 8 ~ 3 H2N N O~O /
p Rs w (XVIII) wherein R3 is hydrogen or methyl, 8415 hydrogen, alkanyl, substituted alkanyl, aryl, io substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl, R8 is hydrogen or methyl and R9 is hydrogen, alkanyl, substituted all~anyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl or substituted heteroarylalkanyl, or optionally, R$ and R9 together with the atoms to which they are bonded, form a cycloheteroalkyl or substituted cycloheteroalkyl 15 ring.
In one embodiment of a compound of Formula (XVIII), R4 is hydrogen, alkanyl or cycloalkanyl. Preferably, R4 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl or cyclohexyl. Preferably, R8 is hydrogen and R9 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CHZOH, -CH(OH)CH3, 20 -CHZC02H, -CHZCH2C02H, -CH2CONH2, -CH2CHZCONH2, -CH2CH2SCH3, -CHZSH, -CH2(CH2)3NHz, -CH2CH2CH2NHC(NH)NHZ, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl or optionally, R8 and Rg together with the atoms to which they are bonded, form an azetidine, pyrrolidine or piperidine ring.
In another embodiment of a compound of Formula (XVIII), R4 is substituted 25 alkanyl. Preferably, R4 is -CH20H, -CH(OH)CH3, -CH2C02H, -CH2CH2COZH, -CH2CONH2, -CH2CHZCONH2, -CHZCH2SCH3, -CHZSH, -CH2(CH2)3NHz or -CH2CH~CHZNHC(NH)NHZ. Preferably, R8 is hydrogen and R9 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CHZOH, -CH(OH)CH3, -CHZC02H, -CHZCH2C02H, -CH2CONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CHaSH, -CHZ(CHZ)3NH2, -CHZCH2GH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl or optionally, R8 and R9 together with the atoms to which they are bonded, form an azetidine, pyrrolidine or piperidine ring.
In still another embodiment of a compound of Formula (XVIII), R4 is aryl, s arylalkanyl, substituted arylalkanyl or heteroarylalkanyl. Preferably, R4 is phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl or 3-indolylmethyl. Preferably, R$ is hydrogen and R9 is hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH20H, -CH(OH)CH3, -CH2COZH, -CH2CH2C02H, -CHzCONHz, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CHa(CH2)3NHa, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, l0 4-hydroxybenzyl, 4-imidazolylinethyl or 3-indolylmethyl, or optionally, Rg and R9 together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
In still another embodiment of a compound of Formula (XVIII), the a-carbon of the N-terminal amino acid residue is of the L-configuration. W still another embodiment of a compound of Formula (XVIII), the a-carbon of the N-terminal amino acid residue is of the Is D-configuration. In still another embodiment of a compound of Formula (XVIII), the a-carbon of the C-terminal amino acid residue is of the L-configuration. In still another embodiment of a compound of Formula (XVIII), the a-carbon of the C-terminal amino acid residue is of the D-configuration. In still another embodiment of a compound of Formula (XVIII), the a-carbons of both the N- and C-terminal amino acid residues are of the 2o L-configuration.
In still another embodiment of a compound of Formula (XVIII), R3 is hydrogen.
Compounds of structural Formulae (I) - (XVIII) may be administered orally and transported across cells (i.e., enterocytes) lining the lumen of the gastrointestinal tract.
While not wishing to be bound by any particular transport mechanism, some of the 2s compounds of structural Formulae (I) - (XVIII) may be substrates for the proton-coupled intestinal peptide transport system ("PEPTl") (Leibach et al., Arznu. Rev.
Nut~~. 1996, 16, 99-119) which, typically mediates the cellular uptake of small intact peptides consisting of two or three amino acids that are derived from the digestion of dietary proteins. In the intestine, where small peptides are not effectively absorbed by passive diffusion, PEPTl 3o may act as a vehicle for their effective uptake across the apical membrane of the gastric mucosa.
Methods for determining whether compounds of Formulae (I) - (XVIII) serve as substrates for the PEPT1 transporter are disclosed in Example 131 herein (see Section 5).

In vitro systems, which use cells engineered to heterologously express the transport system, or cell-lines that endogenously express the transporter (e.g. Caco-2 cells) may be used to assay transport of compounds of Formulae (I) - (XVIII) by PEPT1 transporter.
Standard methods for evaluating the enzymatic conversion of propofol prodrug compounds to propofol ira vitro are disclosed in Example 132 herein.
Oral administration of propofol prodrug compounds to rats and monkeys is described in Examples 134 and 135 respectively.
Synthesis of Propofol Prodru~ Compounds to The compounds of Formulae (I) - (XVIII) may be obtained via the synthetic methods illustrated in Schemes 1-10. Starting materials useful for preparing these compounds and intermediates thereof are commercially available or can be prepared by well-known synthetic methods (Harrison et al., "Compendium of Synthetic Organic Methods", Vols. 1-8 (John Wiley and Sons, 1971-1996); "Beilstein Handbook of Organic is Chemistry," Beilstein W stitute of Organic Chemistry, Frankfurt, Germany;
Feiser et al., "Reagents for Organic Synthesis," Volumes 1-17, Wiley Interscience; Trost et al., "Comprehensive Organic Synthesis," Pergamon Press, 1991; "Theilheimer's Synthetic Methods of Organic Chemistry," Volumes 1-45, Larger, 1991; March, "Advanced Organic Chemistry," Wiley Interscience, 1991; Larock "Comprehensive Organic Transformations,"
2o VCH Publishers, 1989; Paquette, "Encyclopedia of Reagents for Organic Synthesis," John Wiley & Sons, 1995). Other methods for synthesis of the compounds described herein and/or starting materials are either described in the art or will be readily apparent to the skilled artisan. Accordingly, the methods presented in Schemes 1-10 herein are illustrative rather than comprehensive.
2s Certain amino acid building blocks useful for the preparation of compounds of Formula (I) are illustrated in Scheme 1. Amino acids of either L- or D-stereochemistry may be used in these reactions. Compound (2) is a protected aspartic or glutamic acid residue, where the protecting groups Pgl and Pgz are removable under orthogonal conditions. Non-limiting examples of useful protecting groups for the nitrogen atom 3o include text-butyloxycarbonyl (Boc), benzyloxycarbonyl (CBz) and 9-fluorenylmethyloxycarbonyl (Fmoc) moieties, while those for the carboxyl group include tart-butyl, benzyl and 9-fluorenylinethyl esters. Nitrogen protected amino acid residues may be conveniently activated for coupling via conversion to their NHS esters, as illustrated by the preparation of compounds (7) and (8).
Scheme 1 O O
H H
HO Pg1 N O-Pg2 Coupling Pg1 N O-Pg2 '~' ( j O reagent ~ ( j O
OH \ O (3) (2) ( ) ~_1,~ ~ /
O H O
Pg~_N
H2N O-P ~ ~OH
g Deprotection 2 O
Deprotection 1 ( ~ O (3) ( j O ~ \ O
(4) (5) O
~ NHS,DCC ,H O
Pg~ N/ 'C02H Pg2'N ~N
MeCN
(6) (7) O O

Pg~_N O~N
(5) NHS , DCC '\O
MeCN (j O
\ O
($) A method for preparing a compound of Formula (I) where n is 0, m is 1 or 2, X
is a bond, Rl is [HZN(CHR)C(O)]- and RZ is OH, i.e., compound (10), is illustrated in Scheme 2.
~ o Compound (4) is reacted either with active ester (7) or protected amino acid (6) in the presence of a peptide coupling agent to afford intermediate (9), which upon deprotection yields compound (10).
Scheme 2 R O
H
Pg2 N N O Pg2 Coupling (4) + (7) Base O~( ~ O < (4) + (6) reagent (9) Deprotection 2 R O
H

O (. O
\ O
(10) In a similar fashion, a method for preparing a compound of Formula (I) where n is 0, s m is 1 or 2, X is a bond, RI is hydrogen and RZ is -[NH(CHR)C(O)OH], i.e., compound (13), is illustrated in Scheme 3. Compound (11) is reacted either with active ester (8) or protected amino acid (5) in the presence of a peptide coupling agent to afford intermediate (12), which upon deprotection yields compound (13).

Scheme 3 O R
R P ~-N I O p ~' Coupling ) + H N O-Pg~~ Base g N~ - g E (11) .~- (5) z H II reagent O O
(11) O ( i O
(12) Deprotection 1 H
(13) Compounds of Formula (I) may also be prepared via solid-phase synthesis methods, as is illustrated in Scheme 4 below for the preparation of compounds (10) and (13).
Scheme 4 H
Pg~-N
1. Deprotect (5) -i- HO ~ O (10) ( , 2. Couple (6) O 3. Cleave (14) O
' H 1. De rotect (6) -!- HO -~. Pg2-N O- p (13) 2. Couple (5) R
(15) 3. Cleave s Compounds of Formula (I) where n is 0, m is 1, X is O, Rl is [H2N(CHR)C(O)]-and R~ is OH, i.e., compound (18), may be prepared by methods illustrated in Scheme 5.

Propofol is converted to the chloroformate derivative (16) by treatment with a phosgene equivalent and then reacted with serine dipeptide (17). Deprotection affords the propofol carbonate compound (18).
Scheme 5 ( ) Phosgene \ O~OI

Base ~ / O
(16) R O
R O H
P -N N OP 1. (16) , Base H2N N OH
g ~ g 2. Deprotect O O
(17) OH (18) O O
/
Compounds of Formula (I) where n is 1, m is 1 or 2, X is a bond, R1 is [H2N(CHR)C(O)]- and RZ is OH, i.e., compound (23), may be prepared by methods illustrated in Scheme 6. The protected aspartate or glutamate dipeptide (19) is treated with the gem-dialkylating agent (20) in the presence of a base or metal promoter agent (typically to a soluble Ag+ or Hgz+ salt) to afford intermediate (21). Displacement of the second leaving group XZ from (21) by propofol generates acyloxyalkyl ether (22), which upon deprotection affords the desired compound (23). If XZ in (27) is SR (e.g., thiomethyl), activation by treatment with sulfuryl chloride or similar halogenating agent precedes displacement by propofol to generate compound (22).

Scheme 6 R O ~ (20) R O
H N X / \Xz H 1 Pg- OPg H N ( ) Pg- ~OPg --O ( . O Base or O O Base or promoter ( ~ promoter OH
(19) X~ = CI, Br, I, OSOzR O~R3 (21 ) Xz = CI, Br, I, SR X
z R O R O
H H Deprotect H
N
Pg- ~OPg HzN N OH
O (, O O ( . O

O R3 O\ /R3 (22) ~ (23) \ O \
/ ~/
Alternatively, compound (22) may be prepared by first generating the haloalkyl (or thioalkyl) propofol ether (24), then displacing the leaving group X2 with the carboxylate anion of dipeptide (19), as shown in Scheme 7.
Scheme 7 Base or pr \Rs promoter (1 ) -I- (20) -(24) (24) (19) -~ (22) Base or promoter 111 an analogous manner, compounds of Formula (I) where n is l, m is 1 or 2, X
is a bond, Rl is hydrogen, and RZ is -[NH(CHR)C(O)OH], i.e., compound (28), may be prepared as illustrated in Scheme 8.
Scheme 8 O R
O R H
Pg-N _ OPg (2U) Pg N N OPg (1) ( Base or ( , O O Base or ~ O O
promoter O 3 promoter OH R
(25) (26) O R O R

Pg-N N OPg Deprotect N
H O O
O O
O\ /R3 O\ /R3 (27) O (28) OO
(24) (25) -~ (27) Base or promoter Compounds of Formula (II) where n is 0, q is l, and Rl° is [HZN(CHR)C(O)]-, i.e., compound (30), may be prepared according to methods illustrated in Scheme 9.

Scheme 9 R
Coupling H O 1. Deprotect 1 + 6 P -N
( ) ( ) reagent g ~ 2. Couple (6) (2g) 3. Deprotect O R

R H
O ~ /
(30) Compounds ofFormula (II) where n is 1, q is 1, and Rl° is hydrogen, i.e., compound (33), and where n is 1, q is 1, and Rl° is [H2N(CHR)C(O)]-, i.e., compound (34), may be prepared according to methods illustrated in Scheme 10. Synthesis of intermediate (32) s proceeds either via haloalkyl ester (31) or haloalkyl ether (24) as previously described.
Scheme 10 (g) + (24) Base or promoter Base or R (1) R
promoter H O X~ ~ H O O
(6) -I- (20) Pg-N ~ Pg-N
Base or O R3 promoter O Rs /
(31) (32) Deprotect O R R
H~N~ O O ~ 1. Couple (12) H N O~O
H
R O ~ ~ / 2. Deprotect O Ra /
R v (34) (33) l0 Therapeutic/Prophylactic Uses and Methods of Administration The compounds of Formulae (I) - (XVIII), as described herein, may be used to treat and/or prevent migraine in patients. The methods comprise administering to a patient a therapeutically effective amount of a compound of Formulae (I) - (XVIII) to treat and/or prevent migraine. In the therapeutic methods herein, a therapeutically effective amount of the compound is administered to a patient suffering from a migraine headache.
In the prophylactic methods herein, a therapeutically effective amount of the compound is administered to a patient at risk of developing a migraine.
In one embodiment, the compounds are administered orally to treat and/or prevent to migraine. However, in other embodiments, the compounds are administered parenterally (e.g., via inhalation or injection). In one embodiment, the compounds are administered in amounts of between about 10 mg to about 4 g to treat or prevent migraine.
The compounds of Formulae (I) - (XVIII) may also be used as anti-emetics and can be administered to patients at risk of vomiting and/or who are nauseous. For example, the Is compounds may be administered to patients that are being concurrently treated with various chemotherapy agents and/or surgical procedures, which induce nausea, in order to treat and/or prevent nausea and vomiting. Typically, a therapeutically effective amount of the compound is administered to a patient to treat and/or prevent nausea and vomiting.
In one embodiment, the compounds are administered orally to treat and/or prevent 2o nausea or vomiting. However, in other embodiments, the compounds are administered parenterally (e.g., via inhalation or injection to treat and/or prevent nausea or vomiting. In one embodiment, the compounds are administered in amounts of between about 10 mg to about 4 g to treat andlor prevent nausea or vomiting.
The compounds of Formulae (I) - (XVIII) may also be used as hypnotic agents to 2s induce and/or maintain general anesthesia and/or as a sedative. Typically, a therapeutically effective amount of the compound is administered to a patient to induce hypnosis, anesthesia and/or sedation.
In one embodiment, the compounds are administered intravenously when used as a general anesthetic. In another embodiment, the compounds are administered by inhalation.
3o The compounds may be formulated by methods used to formulate propofol, which are well known in the art. In one embodiment, compounds of Formulae (I) - (XVIII) that are water soluble may be formulated as an injectable aqueous solution, which contains significantly less emulsifiers or solubilizers than used in aqueous formulations of propofol, thereby avoiding discomfort at the site of injection.
In one embodiment, the compounds are administered orally in amounts of about mg to 4 g daily when used as a sedative (e.g., for the treahnent of anxiety conditions).
However, in another embodiment, the compounds may also be administered by inhalation, intravenously or intramuscularly when used as a sedative.
The compounds of Formulae (I) - (XVIII) may be administered in similar amounts and in the same schedule as described in the art for propofol. In one embodiment, dosage levels of the compounds of Formulae (I) - (XVIII) for producing general anesthesia, maintaining anesthesia and producing a sedative effect are as described in the art for propofol.
The compounds of Formulae (I) - (XVIII) may also be used to inhibit oxidation in biological materials. The methods involve contacting the biological material with an effective amount of the compound. In therapeutic methods herein, a therapeutically is effective amount of the compound is administered to a patient suffering from a pathological condition treated by inhibition of oxidation. In prophylactic methods herein, a therapeutically effective amount of the compound is administered to a patient at risk of developing a disease as a result of exposure to oxidative stress. The compounds may find particular use in preventing and/or treating oxidation in disorders of the central nervous 2o system that involve an inflammatory component.
The compounds of Formulae (I) - (XVIII) may be used to treat and/or prevent neurodegenerative conditions of the nervous system, which include, but are not limited to, Friedrich's disease, Parkinson's disease, Alzheimer's disease, Huntington's disease, amyotrophic lateral sclerosis (ALS), multiple sclerosis (MS) and Pick disease.
In one 2s embodiment, a therapeutically effective amount of a compound (e.g., between about 10 mg to about 4 g daily) is orally administered to treat and/or prevent chronic neurodegenerative diseases.
The compounds of Formulae (I) - (XVIII) may also be used to treat and/or prevent trauma to the central nervous system such as, for example, skull fracture and its resulting so edema, concussion, contusion, brain hemorrhages, shearing lesions, subdural and epidural hematoma, and spinal cord injury (e.g., mechanical injury due to compression or flexion of the spinal cord). In one embodiment, a compound is parenterally administered by intravenous injection or injection directly into the central nervous system (i.e., intrathecally ("IT") or into the brain) to treat and/or prevent traumatic conditions of the central nervous system. In another embodiment, a therapeutically effective amount of a compound (e.g., between about 25 mg to about 500 mg IV or IM and between about 5 mg to about 100 mg IT) are administered to treat and/or prevent traumatic conditions of the central nervous system.
The compounds of Formulae (I) - (XVIII) may also be used as anti-convulsives to treat and/or prevent seizures (e.g., epileptic seizures). Methods for treating and/or preventing convulsions comprise administering a therapeutically effective amount of a compound to a patient in need of such treatment. In one embodiment, the compounds are administered orally to treat and/or prevent convulsions. In another embodiment, the compounds are parenterally administered to treat and/or prevent convulsions.
In still another embodiment, the compounds are administered in amounts of between about 10 mg to about 4 g daily to treat and/or prevent convulsions.
When used to treat and/or prevent the above disease or disorders compounds and/or is pharmaceutical compositions of Formulae (I) - (XVIII) may be administered or applied singly, or in combination with other agents. The compounds and/or compositions may also be administered or applied singly, or in combination with other pharmaceutically active agents, including other compounds of Formulae (I) - (XVIII).
Provided herein are methods of treatment and prophylaxis by administering to a 2o patient a therapeutically effective amount of a composition or compound of Formulae (I) -(XVIII). The patient may be an animal, is more preferably, a mammal and even more preferably, a human.
The compounds of Formulae (I) - (XVIII) and/or pharmaceutical compositions thereof are preferably administered orally. The compounds and/or pharmaceutical 2s compositions thereof may also be administered by any other convenient route, for example, by infusion or bolus injection, by absorption through epithelial or mucocutaneous linings (e.g., oral mucosa, rectal and intestinal mucosa, etc.). Administration can be systemic or local. Various delivery systems are known, (e.g., encapsulation in liposomes, microparticles, microcapsules, capsules, etc.) that can be used to administer a compound 3o and/or pharmaceutical composition. Methods of administration include, but are not limited to, intradermal, intramuscular, intraperitoneal, intravenous, subcutaneous, intranasal, epidural, oral, sublingual, intranasal, intracerebral, intravaginal, transdermal, rectally, by inhalation, or topically, particularly to the ears, nose, eyes, or skin.

In specific embodiments, it may be desirable to administer one or more compounds and/or pharmaceutical compositions thereof locally to the area in need of treatment. This may be achieved, for example, and not by way of limitation, by local infusion during surgery, topical application, e.g., in conjunction with a wound dressing after surgery, by s inj ection, by means of a catheter, by means of a suppository, or by means of an implant, said implant being of a porous, non-porous, or gelatinous material, including membranes, such as sialastic membranes or fibers. In one embodiment, administration can be by direct injection at the site (or former site) of cancer or arthritis.
In certain embodiments, it may be desirable to introduce one or more compounds to and/or pharmaceutical compositions thereof into the central nervous system by any suitable route, including intraventricular, intrathecal and epidural inj ection.
Intraventricular injection may be facilitated by an intraventricular catheter, for example, attached to a reservoir, such as an Ommaya reservoir.
In one embodiment, the compounds and/or pharmaceutical compositions can be is delivered via sustained release systems, preferably oral sustained release systems. In one embodiment, a pump may be used (Larger; supra; Sefton,1987, CRC Cz~it Ref Biorned Eng.
14:201; Saudek et al.,1989, N. Engl. JMed. 321:574).
In another embodiment, polymeric materials can be used (see "Medical Applications of Controlled Release," Larger and Wise (eds.), CRC Pres., Boca Raton, Florida (1974);
20 "Controlled Drug Bioavailability," Drug Product Design and Performance, Smolen and Ball (eds.), Wiley, New York (1984); Larger et al., 1983, JMac>~orzzol. Sci. Rev.
Macz~omol Chenz. 23:61; Levy et al.,1985, Science 228: 190; During et al.,1989, Ann.
Neurol. 25:351;
Howard et al.,1989, J. Neu~osu~g. 71:105).
In still another embodiment, polymeric materials are used for oral sustained release 2s delivery. Preferred polymers include sodium carboxymethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose and hydroxyethylcellulose (most preferred, hydroxypropylmethylcellulose). Other preferred cellulose ethers have been described (Alderman, Int. J. PhaYnz. Teclz. & Prod. Mfi-. 1984, 5(3) 1-9).
Factors affecting drug release are well known to the skilled artisan and have been described in the art (Bamba 3o et al., Irzt. J. Plzarnz. 1979, 2, 307).
In still another embodiment, enteric-coated preparations can be used for oral sustained release administration. Preferred coating materials include polymers with a pH-dependent solubility (i.e., pH-controlled release), polymers with a slow or pH-dependent rate of swelling, dissolution or erosion (i.e., time-controlled release), polymers that are degraded by enzymes (i.e., enzyme-controlled release) and polymers that form firm layers that are destroyed by an increase in pressure (i.e., pressure-controlled release).
s In still another embodiment, osmotic delivery systems are used for oral sustained release administration (Verma et al., Drug Dev. Ind. Pharm. 2000, 26:695-708).
In a preferred embodiment, OROSTM osmotic devices are used for oral sustained release delivery devices (Theeuwes et al., United States Patent No. 3,845,770;
Theeuwes et al., United States Patent No. 3,916,899).
io For administration by inhalation, a compound may be conveniently delivered to the lung by a number of different devices. For example, a Metered Dose Inhaler ("MDI") which utilizes canisters that contain a suitable low boiling propellant, e.g., dichlorodifluoromethane, trichlorofluoromethane, dichlorotetrafluoroethane, carbon dioxide or other suitable gas may be used to deliver compounds directly to the lung. .
is Alternatively, a Dry Powder Inhaler ("DPI)" device may be used to administer a compound to the lung (See, e.g., Raleigh et al., Proc. AnaeY. Assoc. Cancer Research AfZnual Meeting 1999, 40, 397). DPI devices typically use a mechanism such as a burst of gas to create a cloud of dry powder inside a container, which may then be inhaled by the patient and are well knovm in the art and may be purchased from a number of commercial 2o sources. A popular variation is the multiple dose DPI ("MDDPI") system, which allows for the delivery of more than one therapeutic dose. For example, capsules and cartridges of gelatin for use in an inhaler or insufflator may be formulated containing a powder mix of a compound and a suitable powder base such as lactose or starch for these systems.
Another type of device that may be used to deliver a compound to the lung is a 2s liquid spray device supplied, for example, by Aradigm Corporation, Hayward, CA. Liquid spray systems use extremely small nozzle holes to aerosolize liquid drug formulations that may then be directly inhaled into the lung.
In one embodiment, a nebulizer device is used to deliver a compound to the lung.
Nebulizers create aerosols from liquid drug formulations by using, for example, ultrasonic energy to form fine particles that may be readily inhaled (e.g., Verschoyle et al., British J.
GanceY 1999, 80, Suppl. 2, 96; Armer et al., United States Patent No.
5,954,047; van der Linden et al., United States Patent No. 5,950,619; van der Linden et al., United States Patent No. 5,970,974).

In another embodiment, an electrohydrodynamic ("EHD") aerosol device is used to deliver a compound to the lung. EHD aerosol devices use electrical energy to aerosolize liquid drug solutions or suspensions (see e.g., Noakes et al., United States Patent No.
4,765,539; Coffee, United States Patent No. 4,962,885; Coffee, International Publication s No., WO 94/12285; Coffee, International Publication No., WO 94/14543;
Coffee, International Publication No., WO 95/26234, Coffee, International Publication No., WO
95/26235, Coffee, International Publication No., WO 95/32807). The electrochemical properties of a compound may be important parameters to optimize when delivering the compound to the lung with an EHD aerosol device, and such optimization is routinely to performed by one of skill in the art. EHD aerosol devices may more efficiently deliver drugs to the lung than existing pulmonary delivery technologies. Other methods of intra-pulmonary delivery of a compound will be known to the skilled artisan.
The compounds of Formulae (I) - (VIII) and/or compositions containing such compounds preferably provide therapeutic or prophylactic levels of propofol upon ifz rivo ~s administration to a patient. While not wishing to bound by theory, the promoiety or promoieties of the compounds may be cleaved either chemically and/or enzymatically. One or more enzymes present in the stomach, intestinal lumen, intestinal tissue, blood, liver, brain or any other suitable tissue of a mammal may enzyrnatically cleave the promoiety or promoieties of the administered compounds.
2o While not wishing to bound by theory, the promoiety or promoieties of the compounds may be cleaved prior to absorption by the gastrointestinal tract (e.g., within the stomach or intestinal lumen) and/or after absorption by the gastrointestinal tract (e.g., in intestinal tissue, blood, liver or other suitable tissue of a mammal).
Preferably, propofol remains conjugated to a promoiety during transit across the intestinal mucosal barrier to 2s provide protection from presystemic metabolism. In one embodiment, the compounds are essentially not metabolized to propofol within enterocytes, but are metabolized to the parent drug within the systemic circulation. Cleavage of the promoiety or promoieties of the compounds after absorption by the gastrointestinal tract may allow these prodrugs to be absorbed into the systemic circulation either by active transport, passive diffusion or by a 3o mixture of both active and passive processes. In one embodiment, the compounds are actively absorbed through interaction with the intestinal peptide transporter PEPT1.
Cleavage of the promoiety or promoieties of the compounds of Formulae (I) -(XVIII) after absorption by the gastrointestinal tract, may allow these prodrugs to be absorbed into the systemic circulation from the large intestine. In one embodiment, the compounds and/or pharmaceutical compositions containing compounds of Formulae (I) -(XVIII) are preferably administered as sustained release systems. In another embodiment, the compounds and/or pharmaceutical compositions are delivered by oral sustained release administration. Preferably, in this embodiment, the compounds and/or pharmaceutical compositions are administered twice per day (more preferably, once per day).
Pharmaceutical Comuositions The present pharmaceutical compositions contain a therapeutically effective amount of one or more compounds of Formulae (I) - (XVIII), preferably, in purified form, together with a suitable amount of a pharmaceutically acceptable vehicle, so as to provide the form for proper administration to a patient. When administered intravenously to a patient, the compounds and pharmaceutically acceptable vehicles are preferably sterile.
Water is a preferred vehicle when a compound is administered intravenously. Saline solutions and ~s aqueous dextrose and glycerol solutions can also be employed as liquid vehicles, particularly for injectable solutions. Suitable pharmaceutical vehicles also include excipients such as starch, glucose, lactose, sucrose, gelatin, malt, rice, flour, chalk, silica gel, sodium stearate, glycerol monostearate, talc, sodium chloride, dried skim milk, glycerol, propylene, glycol, water, ethanol and the like. The present compositions, if 2o desired, can also contain minor amounts of wetting or emulsifying agents, or pH buffering agents. In addition, auxiliary, stabilizing, thickening, lubricating and coloring agents may be used.
Pharmaceutical compositions comprising a compound of Formulae (I) or (II) may be manufactured by means of conventional mixing, dissolving, granulating, dragee-making, 2s levigating, emulsifying, encapsulating, entrapping or lyophilizing processes.
Pharmaceutical compositions may be formulated in conventional manner using one or more physiologically acceptable Garners, diluents, excipients or auxiliaries, which facilitate processing of compounds into preparations which can be used pharmaceutically.
Proper formulation is dependent upon the route of administration chosen.
3o The present pharmaceutical compositions can take the form of solutions, suspensions, emulsion, tablets, pills, pellets, capsules, capsules containing liquids, powders, sustained-release formulations, suppositories, emulsions, aerosols, sprays, suspensions, or any other form suitable for use. In one embodiment, the pharmaceutically acceptable vehicle is a capsule (see e.g., Grosswald et al., United States Patent No.
5,69,155). Other examples of suitable pharmaceutical vehicles have been described in the art (see Remington's Pharmaceutical Sciences, Philadelphia College of Pharmacy and Science, 19th Edition, 1995). Preferred pharmaceutical compositions are formulated for oral delivery.
Pharmaceutical compositions for oral delivery may be in the form of tablets, lozenges, aqueous or oily suspensions, granules, powders, emulsions, capsules, syrups, or elixirs, for example. Orally administered pharmaceutical compositions may contain one or more optional agents, for example, sweetening agents such as fructose, aspartame or saccharin, flavoring agents such as peppermint, oil of wintergreen, or cherry coloring agents Io and preserving agents, to provide a pharmaceutically palatable preparation.
Moreover, where in tablet or pill form, the pharmaceutical compositions may be coated to delay disintegration and absorption in the gastrointestinal tract, thereby providing a sustained action over an extended period of time. Selectively permeable membranes surrounding an osmotically active driving compound are also suitable for orally administered compounds is and pharmaceutical compositions. In these later platforms, fluid from the environment surrounding the capsule is imbibed by the driving compound, which swells to displace the agent or agent composition through an aperture. These delivery platforms can provide an essentially zero order delivery profile as opposed to the spiked profiles of immediate release fornulations. A time delay material such as glycerol monostearate or glycerol stearate may 2o also be used. Oral pharmaceutical compositions can include standard vehicles such as mannitol, lactose, starch, magnesium stearate, sodium saccharine, cellulose, magnesium carbonate, etc. Such vehicles are preferably of pharmaceutical grade.
For oral liquid preparations such as, for example, suspensions, elixirs and solutions, suitable carriers, excipients or diluents include water, saline, alkyleneglycols (e.g., 2s propylene glycol), polyalkylene glycols (e.g., polyethylene glycol) oils, alcohols, slightly acidic buffers between pH 4 and pH 6 (e.g., acetate, citrate, ascorbate at between about 5 mM to about 50 mM), etc. Additionally, flavoring agents, preservatives, coloring agents, bile salts, acylcarnitines and the like may be added.
A compound of Formulae (I) - (XVIII) may also be formulated in rectal or vaginal 3o pharmaceutical compositions such as suppositories or retention enemas, e.g., containing conventional suppository bases such as cocoa butter or other glycerides.
In addition to the formulations described previously, a compound of Formulae (I) -(XVIII) may also be formulated as a depot preparation. Such long acting formulations may be administered by implantation (for example subcutaneously or intramuscularly) or by intramuscular injection. Thus, for example, a compound may be formulated with suitable polymeric or hydrophobic materials (for example as an emulsion in an acceptable oil) or ion exchange resins, or as sparingly soluble derivatives, for example, as a sparingly soluble salt.
When a compound of Formulae (I) - (XVIII) is acidic, it may be included in any of the above-described formulations as the free acid, a pharmaceutically acceptable salt, a solvate, hydrate or N-oxide. Pharmaceutically acceptable salts substantially retain the activity of the free acid, may be prepared by reaction with bases and tend to be more soluble in aqueous and other protic solvents than the corresponding free acid form.
1 o Liquid drug formulations suitable for use with nebulizers and liquid spray devices and EHD aerosol devices will typically include a compound with a pharmaceutically acceptable carrier. Preferably, the pharmaceutically acceptable carrier is a liquid such as alcohol, water, polyethylene glycol or a perfluorocarbon. Optionally, another material may be added to alter the aerosol properties of the solution or suspension of the compounds.
i s Preferably, this material is liquid such as an alcohol, glycol, polyglycol or a fatty acid.
Other methods of formulating liquid drug solutions or suspension suitable for use in aerosol devices are known to those of skill in the art (e.g., Biesalski, United States Patent No.
5,112,598; Biesalski, United States Patent No. 5,556,611).
2o Combination Therapy In certain embodiments, the compounds of Formulae I) - (XVIII) can be used in combination therapy with at least one other therapeutic agent. The compound and the other therapeutic agents) can act additively or, more preferably, synergistically.
In a preferred embodiment, a composition comprising a propofol prodrug compound is administered 2s concurrently with the administration of another therapeutic agent, such as for example, another sedative, hypnotic agent or anesthetic agent (e.g., propofol), which can be part of the same composition as the propofol prodrug compound or a different composition. In another embodiment, a composition comprising a propofol prodrug compound is administered prior or subsequent to administration of another therapeutic agent, such as, for so example, another sedative, hypnotic agent or anesthetic agent, (e.g., propofol).

Examples The invention is further defined by reference to the following examples, which describe preparation of compounds of Formulae (I) - (XVIII), compositions containing such compounds and assays for using such~compounds and compositions. It will be s apparent to those skilled in the art that many modifications, both to materials and methods, may be practiced without departing from the scope of the invention.
In the examples below, the following abbreviations have the following meanings. If an abbreviation is not defined, it has its generally accepted meaning.
Aib - a-aminoisobutyric acid Atm - atmosphere Boc - tert-butyloxycarbonyl Bzl - benzyl Cbz - carbobenzyloxy ~s Dap - L-2,3-diaminopropionic acid DCC - dicyclohexylcarbodiimide DMAP - 4-N,N dimethylaminopyridine DMEM - Dulbecco's minimun eagle medium DMF - N,N dimethylformamide 2o DMSO - dimethylsulfoxide Fmoc - 9-fluorenylmethyloxycarbonyl g - gram h - hour HBSS - Hank's buffered saline solution 2s L - liter LC/MS - liquid chromatography/mass spectroscopy M - molar min - minute mL - milliliter so mmol - millimoles NHS - N-hydroxysuccinimide PBS - phosphate buffered saline THF - tetrahydrofuran TFA - trifluoroacetic acid TMS - trimethylsilyl ~,L - microliter ~.M - micromolar s v/v - volume to volume Boc-Asu(OProuofol)-OBzI (10~
To a homogeneous solution of Boc-Asp-OBzl (322 mg, 1.0 mmol), DMAP (12 mg, l0 0.1 mmol) and propofol (175 ~.L, 0.9 mmol) in tetrahydrofuran (3.5 mL) at room temperature was added dicyclohexylcarbodiimide (308 mg, 1.5 mmol). After stirring for 4 h, the dicyclohexylurea was filtered off and the solution was diluted with ether (100 mL).
The ether layer was washed with 10% citric acid (2x25 mL), saturated sodium bicarbonate (2x25 mL), and brine (2x25 mL). The organic layer was dried over Na2S04 and then is concentrated in vacuo. The crude compound was purified by chromatography on silica gel (Biotage), eluting with a gradient of hexane to 10% EtOAc/hexane) to afford the title compound (101) (400mg, 83% yield). 1H-NMR (400 MHz, CD30D): 8 7.34 (m, SH), 7.16 (m, 3H), 5.20 (d, J =1.6 Hz, 2H), 4.68 (dd, Jl = 5.6, 7.6 Hz, 1H), 3.30 (m, 1H), 3.13 (dd, J =
7.6, 16.8 Hz, 1H), 2.93 (m, 2H), 1.44 (s, 9H), 1.1 (d, J = 7.2 Hz, 12H); MS
(ESI) m/z 506.34 20 (M+Na+).
H-Asp(OPropofol)-OBzI (102) Compound (101) was treated with 30% TFA (30 mL) in dichloromethane (70 mL) for 30 min and the solvent removed in vacuo to afford the title compound, which was used in subsequent reactions without further purification. MS (ESI) rnlz 385.85 (M+H+).
2s Boc-Asp(OPropofol)-OH (103) To a flask containing 500 mg of 10% Pd-C was added a solution of compound (101) in methanol under nitrogen. The resulting mixture was degassed three times, after which hydrogen was introduced via a balloon apparatus. The suspended mixture was allowed to stir vigorously for 4 h. The reaction mixture was filtered through a pad of celite and 3o concentrated in vacuo to arrive at the title compound, which was used in subsequent reactions without further purification. MS (ESI) rralz 392.32 (M-H+).

Boc-Glu(OPropofol)-OBzI (104) To a homogeneous solution of Boc-Glu-OBzl (7.20 g, 0.213 mol), DMAP (0.261 g, 0.021 mol) and propofol (3.76 mL, 0.20 mol) in tetrahydrofuran (40 mL) at room temperature was added dicyclohexylcarbodiimide (5.72 g, 0.278 mol). After stirring for 4 h, the dicyclohexylurea was filtered off and the solution was diluted with ether (250 mL).
The ether layer was washed with 10% citric acid (2 x 100 mL), saturated sodium bicarbonate (2 x 100 mL), and brine (2 x 100 mL). The organic layer was dried over Na2S04 and then concentrated in vacuo. The crude compound was purified by chromatography on silica gel (Biotage), eluting with a gradient of hexane to 10%
to EtOAc/hexane, to afford the title compound (8.20 g, 77% yield). 1H-NMR (400 MHz, CDC13): 8 7.36 (m, SH), 7.15 (m, 3H), 5.21 (m, 2H), 4.45 (m, 1H), 2.89 - 2.75 (m, 2H), 2.74 - 2.63 (m, 2H), 2.34 (m, 1H), 2.10 (m, 1H), 1.46 (s, 9H), 1.18 (d, J = 6.8 Hz, 12H). MS
(ESI) nalz 521.36 (M+Na+).
H-Glu(OPropofol)-OBzI (105) Is Compound (104) was treated with 30% TFA (45 mL) in dichloromethane (105 mL) to arrive at the title compound (105), which was used in subsequent reactions without further purification. MS (ESI) m/z 398.37 (M+H+).
Boc-Glu(OPropofol)-OH (106) To a flask containing 500 mg of 10% Pd-C was added a solution of compound (104) 2o in methanol under nitrogen. The resulting mixture was degassed three times, after which hydrogen was introduced via a balloon apparatus. The suspended mixture was allowed to stir vigorously for 4 h. The reaction mixture was filtered through a pad of celite and concentrated in vacuo to arnve at the title compound, which was used in following reactions without further purification. MS (ESI) ryalz 407.31 (M-H+).

H-Ala-Asp(OPropofol)-OH (107) To a homogeneous solution of CBz-Ala-OH (601 mg, 2.7 mmol) in acetonitrile (5 s mL) was added DCC (667 mg, 3.2 mmol). N Hydroxysuccinimide (434 mg, 3.8 rnmol) was then added and the reaction was allowed to proceed at room temperature for 4 h. The resulting dicyclohexylurea was filtered and to the filtrate was added compound (102) (1.03 g, 2.7 mmol). Triethylamine (5 mL) was added and after stirnng for 6 h, the solution was extracted with ethyl acetate (200 mL), washed with 10% citric acid (2x50 mL), saturated io sodium bicarbonate (2x50 rnL) and brine (2x 50 mL). The organic layer was dried over Na2S04 and then concentrated ifz vacuo. The crude compound was purified by chromatography on silica gel (Biotage), eluting with a gradient of hexane to 20%
EtOAc/hexane) then the eluant was concentrated ifz vacuo to afford a white solid. This product was dissolved in a solution of 50% ethyl acetate : hexanes and added to a flask ~s containing 100 mg of 10% Pd-C under nitrogen. The resulting mixture was degassed three times, then hydrogen was introduced via a balloon apparatus. The suspended solution was allowed to stir vigorously for 12 h. The reaction mixture was filtered through a pad of celite, concentrated in vacuo, and purified by preparative LC/MS to afford the title compound (107) (422 mg, 43% yield). 1H-NMR (400 MHz, CD30D): 8 7.16 (m, 3H), 4.63 20 (dd, J = 4.8, 7.2 Hz 1H), 3.90 (q, J = 7.2, 1H), 3.28-3.16 (m, 2H), 2.97 (m, 2H), 1.55 (d, J =
7.2 Hz 3H), 1.18 (d, J = 6.8 Hz, 12H). MS (ESI) rrzlz 365.32 (M+H+).

H-Phe-Asp(OPropofol)-OH (108) 2s Following procedures for preparation of compound (107), and substituting CBz-Phe-OH for CBz-Ala-OH, provided the title compound (108). MS (ESI) m/z 441.32 (M+H+).

H-~3-Ala-Asp(OPropofol)-OH (109) so Following procedures for preparation of compound (107), and substituting CBz-(3-Ala-OH for CBz-Ala-OH, provided the title compound (109). MS (ESI) m/z 365.32 (M+H+).

H-Abu-Asp(OPropofol)-OH (110) Following procedures for preparation of compound (107), and substituting N-CBz-2-aminobutyric acid for CBz-Ala-OH, provided the title compound (110).
MS
s (ESI) m/z 379.40 (M+H+).

H-Orn-Asp(OPropofol)-OH (111) Following procedures for preparation of compound (107), and substituting a-N-CBz-8-N-CBz-ornithine for CBz-Ala-OH, provided the title compound (111).
MS
(ESI) m/z 408.33 (M+H+) H-NVaI-Asn(OPropofol)-OH (112) is Following procedures for preparation of compound (107), and substituting CBz-norvaline for CBz-Ala-OH, provided the title compound (112). MS (ESI) m/z 393.48 (M+H+).

2o H-Sar-Asp(OPropofol)-OH (113) Following procedures for preparation of compound (107), and substituting CBz-Sar-OH for CBz-Ala-OH, provided the title compound (113). MS (ESI) m/z 388.27 (M+Na ).

2s Preparation of H-Asp(OPropofol)-O-Trityl Resin (114) To a suspension of 2-chlorotrityl resin (4.1g, loading 1.69 mmol/g) and Fmoc-Asp(OPropofol)-OH (14.7 nunol) in DMF (50 mL) was added diisopropylethylamine (5.1 mL, 29.8 mmol) and Q-(1H-benzotriazol-1-yl) N,N,N;N'-tetramethyluronium hexafluoro-phosphate (5.6g, 14.7 mmol). The resulting reaction mixture was shaken at 3o room temperature for 12 h. The resin was filtered and washed with DMF (3 x 50 mL), methanol (3 x 50 mL), and dichloromethane (3 x 50 mL). A 20% v/v piperidine/DMF
solution (50 mL) was then added to the resin and after shaking for 1 h at room temperature, the resin was filtered, washed with DMF (3 x 50 mL), methanol (3 x 50 mL), and dichloromethane (3 x 50 mL), then allowed to dry in a desiccators over 24 h.
The title resin was obtained and carried through subsequent steps.

s H-Asn-Asp(OPropofol)-OH (115) To a suspension of the resin (114) (650 mg, loading 1.3 mmol/g) in DMF (8 mL) was added a homogeneous solution containing Boc-Asn-OH (392 mg, 1.7 mmol) diisopropylethylamine (0.43 mL, 4.5 mmol) and O-(1H-Benzotriazol-1-yl) N,N,N ;N'-tetramethyluronium hexafluorophosphate (642 mg, 1.7 mmol) in DMF.
The ~o reaction mixture was shaken for 12 h, then the resin was filtered and rinsed with DMF (3 x 15 mL), methanol (3 x 15 mL), and dichloromethane (3 x 15 mL). The resin was soaked in 75% TFA (11 mL) in CH~,C12 (4 mL) for 6 h. The resin was washed with CH2Clz and the combined filtrate was collected, concentrated in vacuo and purified by preparative LC/MS
to afford 54 mg of the title compound (115). 1H-NMR (400 MHz, CD30D): 7.16 (m, 3H), ~s 4.71 (dd, J = 4.4, 7.2 Hz 1H), 4.16 (dd, J = 3.6, 9.6 Hz, 1H), 3.29-3.24 (dd, J = 4.8, 17.2 Hz 1H), 3.17-3.11 (dd, J = 7.6, 17.6 Hz, 1H), 3.06-2.95 (m, 2H), 2.77-2.70 (dd, J
= 9.6, 16.8 Hz 1H), 1.19 (d, J = 6.4 Hz, 12H). MS (ESI) m/z 408.67 (M+H~.

2o H-Art-Asp(OPropofol)-OH (116) Following procedures for preparation of compound (115), and substituting Boc-Arg(Mtr)-OH for Boc-Asn-OH, and in the final step soaking the resin in 95%
TFA (14 mL) and dichloromethane (0.8 mL) for 12 h, provided the title compound (116).
MS (ESI) m/z 451.50 (M+H+).
2s H-Asp-Asp(OPropofol)-OH (117) Following procedures for preparation of compound (115), and substituting Boc-Asp(O'Bu)-OH for Boc-Asn-OH, provided the title compound (117). MS (ESI) m/z 30 409.31 (M+H+) H-Cys-Asp(OProuofol)-OH (118) Following procedures for preparation of compound (115), and substituting Boc-Cys(STrt)-OH for Boc-Asn-OH, and in the final step soaking the resin in 95% TFA (14 mL), dichloromethane (0.5 mL) and 1 % triisopropylsilane (0.5 mL) for 6 h provided the title compound (118). MS (ESI) m/z 397.39 (M+H+).

H-Leu-Asp(OPropofol)-OH (119) Following procedures for preparation of compound (115), and substituting Boc-Leu-OH for Boc-Asn-OH, provided the title compound (119). MS (ESI) fralz 407.39 (M+H+).

H-Lys-Asp(OPropofol)-OH (120) is Following procedures for preparation of compound (115), and substituting a-N-Boc-s-N-Boc-Lys-OH for Boc-Asn-OH, provided the title compound (120). MS
(ESI) m/z 422.61 (M+H+).

2o H-Met-Asp(OPropofol)-OH (121) Following procedures for preparation of compound (115), and substituting Boc-Met-OH for Boc-Asn-OH, provided the title compound (121). MS (ESI) m/z 425.14 (M+H+).

2s H-Tyr-Asp(OPropofol)-OH (122) Following procedures for preparation of compound (115), and substituting Boc-Tyr(O'Bu)-OH for Boc-Asn-OH, provided the title compound (122). MS (ESl) m/z 457.33 (M+H+).
3o EXAMPLE 18 H-Ala-Glu(OPropofol)-OH (123) Following procedures for preparation of compound (107), and substituting compound (105) for compound (102) provided the title compound (123). 1H-NMR
(400 MHz, CD30D): b 7.16 (m, 3H), 4.35 (dd, J = 5.2, 7.6 Hz 1H), 3.96 (q, J = 7.2, 1H), 2.94-2.87 (m, 2H), 2.75 (m, 2H), 2.33 (m, 1H), 2.18 (m, 1H), 1.53 (d, J = 6.8 Hz 3H), 1.18 (d, J = 7.2 Hz, 12H). MS (ESI) n2/z 379.34 (M+H+).
s EXAMPLE 19 H-Asn-Glu(OPropofol)-OH (124) Following procedures for preparation of compound (123), and substituting CBz-Asn-OH for CBz-Ala-OH provided the title compound (124). 1H-NMIt (400 MHz, CD3OD): 8 7.16 (m, 3H), 4.38 (dd, J = 7.6, 5.2 Hz 1H), 4.23 (dd, J = 9.2, 3.6 Hz, 1H), 3.00 io (dd, J =16.8, 3.6 Hz, 1H), 2.91 (m, 2H), 2.77 (m, 3H), 2.33 (m, 1H), 2.16 (m, 1H), 1.18 (d, J = 6.8 Hz, 12H). MS (ESl) mlz 422.35 (M+H+). MS (ESI) mlz 422.35 (M+H+).

H-Leu-Glu(OPropofol)-OH (125) is Following procedures for preparation of compound (123) and substituting CBz-Leu-OH for CBz-Ala-OH provided the title compound (125). 1H-NMR (400 MHz, CD30D):
b 7.16 (m, 3H), 4.35 (t, J = 7. 2 Hz, 1H), 3.93 (dd, J = 8.4, 5.6 Hz, 1H), 2.91 (m, 2H), 2.75 (m, 2H), 2.32 (m, 1H), 2.15 (m, 1H), 1.83-1.58 (m, 3H), 1.18 (d, J = 6.8 Hz, 12H), 0.98 (m, 6H). MS (ESI) m/z 421.40 (M+H+).

H-Asp(OPropofol)-Val-OH (126) To a homogeneous solution of compound (103), (874 mg, 2.2 mmol) in acetonitrile (5 mL) was added dicyclohexylcarbodiimide (550 mg, 2.7 mmol). N
hydroxysuccinimide 2s (358 mg, 3.1 mmol) was then added and the reaction was allowed to proceed for 6 h. The resulting dicyclohexylurea was filtered and to the filtrate was added H-Val-O'Bu hydrochloride (499 mg, 2.2 mmol). Triethylamine (5 mL) was added and after stirring for 6 h the solution was extracted with ethyl acetate (100 mL), washed with 10%
citric acid (2x25 mL), saturated sodium bicarbonate (2x25 mL) and brine (2x25 mL). The organic layer was 3o dried over NaZS04 and then concentrated in vacuo. The crude compound was purified by chromatography on silica gel (Biotage), eluting with a gradient of hexane to 10%
EtOAc/hexane) then the eluant concentrated ih vacuo. The product was then treated with 30% TFA (24 mL) in dichloromethane (51 mL) for 45 min, concentrated in vacuo and the residue purified by preparative LC/MS to afford the title compound (126) (72 mg, 8%
yield). 1H-NMR (400 MHz, CD30D): 7.19 (m, 3H), 4.34 (d, J = 5.2 Hz 1H), 4.28 (m, 1H), 3.54-3.34 (m, 1H), 3.23-3.16 (dd, J = 8.8, 18.4 Hz, 1H), 2.95 (m, 2H), 2.25 (m, 1H), 1.21 (d, J = 6.8 Hz, 12H), 1.04 (dd, J = 6.4, 9.6 Hz, 6H). MS (ESI) nalz 393.35 (M+H+).
s H-Asp(OPropofol)-Ile-OH (127) L-Isoleucine-O-Trityl resin was prepared following the protocol outlined in Example 9, substituting Fmoc-Ile for Fmoc-Asp(OPropofol)-OH. The isoleucine-loaded resin (500 to mg, loading 1.3 mmol/g) and compound (103) (1.3 mmol) was suspended in DMF
(8 mL) and diisopropylethylamine (0.68 mL, 3.9 mmol) and O-(1H-Benzotriazol-1-yl) N,N,N ;N'-tetramethyluronium hexafluorophosphate (493 mg, 1.3 mmol) was added.
The reaction mixture was shaken for 12 h after which the resin was filtered and rinsed with DMF (3 x 15 mL), methanol (3 x 15 mL), and dichloromethane (3 x 15 mL). The resin was Is then soaked in 75% TFA (11 mL) in CHaCl2 (4 mL) for 6 h. The resin was washed with CH2C12 and the combined filtrate was collected, concentrated in vacuo and purified by preparative LC/MS to afford the title compound (127) (32 mg, 12% yield). 1H-NMR (400 MHz, CD30D): 7.18 (m, 3H), 4.34 (d, J = 5.2, 1H), 4.20 (dd, J = 3.6, 8.8 Hz, 1H), 3.46 (dd, J = 4.0, 18.4 Hz 1H), 3.19-3.12 (dd, J = 8.8, 18 Hz, 1H), 2.96 (m, 2H), 2.00-1.91 (m, 1H), 20 1.63-1.53 (m, 1H), 1.20 (m, 1H), 1.2 (d, J = 6.8 Hz, 12H), 0.98 (d, J = 9.2 Hz, 3H), 0.95 (t, J
= 7.2 Hz, 3H). MS (ESn m/z 407.36 (M+H+).

H-Asp(OPropofol)-Ala-OH (128) 2s Following procedures for the preparation of compound (127) and substituting Ala-O-Trityl resin for Isoleucine-O-Trityl resin provided the title compound (128). MS
(ESI) m/z 365.32 (M+H+).

3o H-Asp(OPropofol)-Asp-OH (129) Following procedures for the preparation of compound (127) and substituting Asp(O-'Bu)-O-Trityl resin for Isoleucine-O-Trityl resin provided the title compound (129).
MS (ESI) m/z 409.26 (M+H+).

H-Asp(OPropofol)-Gln-OH (130) Following procedures for the preparation of compound (127) and substituting s Gln-O-Trityl resin for Isoleucine-O-Trityl resin provided the title compound (130). MS
(ESI) tnlz 422.32 (M+H+) H-Asp(OPropofol)-Glu-OH (131) Following procedures for the preparation of compound (127) and substituting Glu(O-'Bu)-O-Trityl resin for Isoleucine-O-Trityl resin provided the title compound (131).
MS (ESI) m/z 423.28 (M+H~.

is H-Asp(OPropofol)-Gly-OH (132) Following procedures for the preparation of compound (127) and substituting Gly-O-Trityl resin for Isoleucine-O-Trityl resin provided the title compound (132). MS
(ESI) nalz 351.30 (M+H+).
2o EXAMPLE 28 H-Asp(OPropofol)-Leu-OH (133) Following procedures for the preparation of compound (127) and substituting Leu-O-Trityl resin for Isoleucine-O-Trityl resin provided the title compound (133). MS
(ESI) m/z 407.36 (M+H+).

H-Asp(OPropofol)-Met-OH (134) Following procedures for the preparation of compound (127) and substituting Met-O-Trityl resin for Isoleucine-O-Trityl resin provided the title compound (134). MS
(ESI) m/z 425.31 (M+H+).

H-Asp(OPropofol)-Phe-OH (135) Following procedures for the preparation of compound (127) and substituting Phe-O-Trityl resin for Isoleucine-O-Trityl resin provided the title compound (135). MS
(ESI) m/z 441.32 (M+H+).

H-Asp(OPropofol)-Pro-OH (136) Following procedures for the preparation of compound (127) and substituting Pro-O-Trityl resin for Isoleucine-O-Trityl resin provided the title compound (136). MS
(ESI) m/z 391.31 (M+H+).

H-Asu(OPropofol)-Ser-OH (137) 1s Following procedures for the preparation of compound (127) and substituting Ser(OtBu)-O-Trityl resin for Isoleucine-O-Trityl resin provided the title compound (137).
MS (ESl) rnlz 381.29 (M+H+).

2o H-Glu(OProuofol)-Ala-OH (138) Alanine-O-Trityl resin was prepared following the protocol outlined in Example 9, substituting Fmoc-Ala for Fmoc-Asp(OPropofol)-OH. The alanine-loaded resin (1.5 g, loading 0.5 mmol/g) and compound (106) (1.4 mmol) was suspended in DMF (15 mL) then diisopropylethylamine (0.73 mL, 4.2 mmol) and ~-(1H-Benzotriazol-1-yl) 2s N,N,N ;N'-tetramethyluronium hexafluorophosphate (531 mg, 1.4 mmol) was added. The reaction mixture was shaken for 12 h after which the resin was filtered and rinsed with DMF (3 x 15 mL), methanol (3 x 15 mL), and dichloromethane (3 x 15 mL). The resin was then soaked in 75% TFA (11 mL) in CH2C12 (4 mL) for 6 h. The resin was washed with CHZC12 and the combined filtrate was collected, concentrated in vacuo and purified by 3o preparative LC/MS to afford the title compound (138) (30 mg, 10% yield). 1H-NMR (400 MHz, CD30D): 7.17 (m, 3H), 4.31 (q, J = 2.8 Hz, 1H), 3.95 (t, J = 6.4 Hz, lITJ, 2.94 (m, 4H), 2.29 (m, 2H), 1.43 (d, J = 7.6 Hz, 3H), 1.18 (d, J = 6.4 Hz, 12H). MS
(ESI) m/z 379.34 (M+H+).

H-Glu(OPropofol)-Art-OH (139) Following procedures for the preparation of compound (138) and substituting s Arg(Mtr)-O-Trityl resin for Ala-O-Trityl resin, and in the final step soaking the resin in 95% TFA (14 mL) and dichloromethane (0.8 mL) for 12 h, provided the title compound (139). 1H-NMR (400 MHz, CD30D): 7.17 (m, 3H), 4.29 (t, J = 7.2 Hz, 1H), 3.80 (t, J = 6.8 Hz, 1H), 3.22 (t, J = 6.8, 2H), 2.89 (m, 4H), 2.26 (m, 1H), 2.18 (m, 1H), 1.89 (m, 1H), 1.79 (m, 1H), 1.69 (m, 2H), 1.18 (d, J = 6.8 Hz, 12H). MS (ESI) m/z 464.34 (M+H+).
to H-Glu(OPropofol)-Asp-OH (140) Following procedures for the preparation of compound (138) and substituting Asp(O'Bu)-O-Trityl resin for Ala-O-Trityl resin provided the title compound (140).
Is 1H-NMR (400 MHz, CD30D): 7.17 (m, 3H), 4.65 (dd, J = 7.2, 5.2 Hz, 1H), 3.97 (t, J = 6.4 Hz, 1H), 2.95 (m, SH), 2.82 (dd, J =16, 7.2 Hz, 1H), 2.30 (q, J =12 Hz, 2H), 1.19 (d, J =
6.8 Hz, 12H). MS (ESA m/z 423.31 (M+H+).

2o H-Glu(OPropofol)-Gln-OH (141) Following procedures for the preparation of compound (138) and substituting Asn-O-Trityl resin for Ala-O-Trityl resin provided the title compound (141).
1H-NMR (400 MHz, CD30D): 7.17 (m, 3H), 4.29 (t, J = 6.4 Hz, 1H), 3.94 (m, 1H), 2.92 (m, 4H), 2.29 (q, J = 7.6 Hz, 4H), 2.18 (m, 1H), 2.03 (m, 1H), 1.18 (d, J = 6.4 Hz, 12H). MS
(ESI) m/z 2s 436.30 (M+H+) H-Glu(OPropofol)-Glu-OH (142) Following procedures for the preparation of compound (138) and substituting 3o Glu(O'Bu)-O-Trityl resin for Ala-O-Trityl resin provided the title compound (142).
1H-NMR (400 MHz, CD30D): 7.17 (m, 3H), 4.65 (dd, J = 8.4, 5.2 Hz, 1H), 4.29 (t, J = 6.4 Hz, 1H), 2.93 (m, 4H), 2.40 (m, 2H), 2.30 (m, 3H), 2.03 (m, 1H), 1.18 (d, J =
6.4 Hz, 12H).
MS (ESI) m/z 437.30 (M+H+).

H-Glu(OPropofol)-Gly-OH (143) Following procedures for the preparation of compound (138) and substituting s Gly-O-Trityl resin for Ala-O-Trityl resin provided the title compound (143).
1H-NMR (400 MHz, CD30D): 7.17 (m, 3H), 3.97 (m, 2H), 3.71 (ABq, J = 108 Hz, 17.2 Hz, 1H), 2.89 (m, 4H), 2.27 (m, 2H), 1.19 (d, J = 6.8 Hz, 12H). MS (ESI) rnlz 365.34 (M+H+) to H-Glu(OPropofol)-Ile-OH (144) Following procedures for the preparation of compound (138) and substituting Ile-O-Trityl resin for Ala-O-Trityl resin provided the title compound (144).
1H-NMR (400 MHz, CD30D): 7.17 (m, 3H), 4.32 (d, J = 4.8 Hz, 1H), 3.94 (t, J = 6.0 Hz, 1H), 2.91 (m, 4H), 2.27 (m, 2H), 1.95 (m, 1H), 1.58 (m, 1H), 1.18 (d, J = 6.8 Hz, 13H), 0.97 (m, 6H). MS
is (ESI) ~a/z 421.35 (M+H+).

H-Glu(OPropofol)-Leu-OH (145) Following procedures for the preparation of compound (138) and substituting 2o Leu-O-Trityl resin for Ala-O-Trityl resin provided the title compound (145). 1H-NMR (400 MHz, CD30D): 7.17 (m, 3H), 4.38 (dd, J =10.4, 4.8 Hz, 1H), 3.91 (t, J = 6.4 Hz, 1H), 2.92 (m, 4H), 2.81 (m, 2H), 1.70 (m, 3H), l .l 8 (d, J = 6.8 Hz, 13H), 0.97 (dd, J
= 6.4, 4.4 Hz, 6H). MS (ESI) m/z 421.35 (M+H~).
as EXAMPLE 41 H-Glu(OPropofol)-Lys-OH (146) Following procedures for the preparation of compound (138) and substituting Lys(s-N-Boc)-O-Trityl resin for Ala-O-Trityl resin provided the title compound (146).
1H-NMR (400 MHz, CD30D): 7.17 (m, 3H), 4.65 (t, J = 7.2 Hz, 1H), 3.86 (t, J =
6.4 Hz, 30 1H), 2.92 (m, 6H), 2.27 (m, 2H), 1.88 (m, 1H), 1.74 (m, 3H), 1.48 (m, 2H), 1.18 (d, J = 6.4 Hz, 12H). MS (ESI) m/z 436.39 (1VI+H+).

H-Glu(OPropofol)-Met-OH (147) Following procedures for the preparation of compound (138) and substituting Met-O-Trityl resin for Ala-O-Trityl resin provided the title compound (147).
1H-NMR (400 s MHz, CD30D): 7.16 (m, 3H), 4.40 (dd, J = 7.6, 4.0 Hz, 1H), 3.94 (t, J = 6.4 Hz, 1H), 2.92 (m, 4H), 2.56 (m, 2H), 2.29 (m, 2H), 2.18 (m, 1H), 2.09 (s, 3H), 2.01 (m, 1H), 1.18 (d, J =
6.4 Hz, 12H). MS (ESI) m/z 439.30 (M+H+).

H-Glu(OPropofol)-Phe-OH (148) Following procedures for the preparation of compound (138) and substituting Phe-O-Trityl resin for Ala-O-Trityl resin provided the title compound (148).
1H-NMR (400 MHz, CD30D): 7.26 (m, 4H), 7.17 (m, 3H), 4.55 (dd, J = 9.2, 4.8 Hz, 1H), 3.82 (t, J = 6.0 Hz, 1H), 3.28 - 3.00 (dd, 2H), 2.89 (m, 2H), 2.82 (m, 2H), 2.22 (m, 2H), 2.09 (s, 3H), 2.01 1s (m, 1H), 1.18 (d, J = 6.8 Hz, 12H). MS (ESI) m/z 455.35 (M+H+).

H-Glu(OPropofol)-Ser-OH (149) Following procedures for the preparation of compound (138) and substituting 2o Ser(OtBu)-O-Trityl resin for Ala-O-Trityl resin provided the title compound (149).
1H-NMR (400 MHz, CD30D): 7.17 (m, 3H), 4.39 (t, J = 5.6 Hz, 1H), 4.00 (t, J =
5.6 Hz, 1H), 3.89 (m, 2H), 2.30 (m, 2H), 1.18 (d, J = 6.8 Hz, 12H). MS (ESI) m/z 395.51 (M+H~.

2s H-Glu(OPropofol)-Val-OH (150) Following procedures for the preparation of compound (138) and substituting Val-O-Trityl resin for Ala-O-Trityl resin provided the title compound (150).
1H-NMR (400 MHz, CD30D): 7.17 (m, 3H), 4.28 (d, J = 5.2 Hz, 1H), 3.98 (t, J = 6.4 Hz, 1H), 2.92 (m, 4H), 2.28 (m, 3H), 1.18 (d, J = 6.4 Hz, 12H), 1.00 (dd, J =11.6, 6.4 Hz, 6H).
MS (ESI) m/z 30 407.52 (M+H+).

H-Val-OPronofol (151) To homogeneous solution of Boc-Valine-OH (234 mg, 1.1 mmol) in toluene (5 mL) was added DCC (333 mg, 1.6 mmol). DMAP (11 mg, 0.1 mmol) and propofol (199 yL, 1.1 s mmol) and the reaction mixture was allowed to stir until the solution became homogeneous.
It was then placed in a 60 °C oil bath and allowed to stir for a further 8 h. The reaction mixture was then cooled to room temperature, the dicyclohexylurea was filtered off and the solution was diluted with ether (100 mL). The ether layer was washed with 10%
citric acid (2 x 25 mL), saturated sodium bicarbonate (2 x 25 mL), and brine (2 x 25 mL).
The organic io layer was dried over Na2SO4 and then concentrated in vacuo. The crude compound was purified by radial chromatography on silica gel, eluting with a gradient of hexane to 50%
ethyl acetate/hexane. The resulting residue was treated with 20% TFA (4 mL) in dichloromethane (16 mL) at room temperature for 30 min. After removing the solvent, the resulting residue was purified by preparative LC/MS to afford the title compound (151) (60 Is mg, 20% yield). 1H-NMR (400 MHz, CD3OD): 8 7.24 (m, 3H), 4.46 (d, J = 3.2 Hz, 1H), 2.92 (m, 2H), 2.68 (m, 1H), 1.27 (d, J = 7.6 Hz, 3H), 1.21-1.19 (d, J = 6.8 Hz, 15H). MS
(ESI) m/z 278.30 (M+H+).

2o H-Ala-OPropofol Hydrochloride (152) Following procedures for the preparation of compound (151) and substituting Boc-Ala-OH for Boc-Val-OH. The hydrochloride salts were prepared by treating the desired compound with a solution of 1 N HCl aqueous solution to provide the title compound (152). 1H-NMR (400 MHz, CD30D): b 7.19 - 7.27 (m, 3H), 4.57 (q, J =
7.2 Hz, 2s 1H), 2.92 (m, 2H), 1.81 (d, J = 7.2 Hz, 3H), 1.21 (d, J = 6.8 Hz, 12H). MS
(ESI) m/z 252.44 (M+H+).

H-Asn-OPropofol Hydrochloride (153) 3o Following procedures for the preparation of compound (151) and substituting Boc-Asn(Trt)-OH for Boc-Val-OH provided the crude product. After purification the residue was treated with 90% TFA (45 mL) in dichloromethane (4.5 mL) and 1 triisopropylsilane (0.5 mL) for 4 h. After removal of the solvent the resulting residue was purified by preparative LC/MS and treated with one molar equivalent of 1 N HCl aqueous solution to afford the title compound (153). 1H-NMR (400 MHz, CD30D): 8 7.23 -7.19 (m, 3H), 4.73 - 4.71 (m, 1H), 3.23 - 3.17 (m, 2H), 2.94 (m, 2H), 1.19 (d, J =
6.4 Hz, 12H).
MS (ESI) m/z 294.34 (M+H+).
s H-His-OPronofol (154) Following procedures for the preparation of compound (151) and substituting Boc-His(Boc)-OH for Boc-Val-OH provided the title compound (154). 1H-NMR (400 MHz, CD30D): 8 8.98 (s, 1H), 7.64 (s, 1H), 7.28 - 7.20 (m, 3H), 5.02 - 4.99 (dd, J = 9.6, 5.6 Hz, 1H), 3.86 - 3.81 (m, 1H), 3.59 - 3.53 (dd, J =16.0, 9.6 Hz, 1H), 2.95 (m, 1H), 2.78 (m, 1H), 1.19 (d, J = 6.4 Hz, 12H). MS (ESI) m/z 317.33 (M+H+) is H-Lys-OPropofol Hydrochloride (155) Following procedures for the preparation of compound (151) and substituting a-N-Boc-Lys(s-N-Boc)-OH for Boc-Val-OH. After LC/MS purification, the residue was treated with two molar equivalent of 1 N HCl aqueous solution to provide the title compound (155). 1H-NMR (400 MHz, CD30D): 8 7.20 - 7.28 (m, 3H), 4.52 (t, J =
6.0 Hz, 20 1H), 3.01 - 2.89 (m, 4H), 2.35 - 2.29 (m, 1H), 2.16 - 2.09 (m, 1H), 1.81 -1.67 (m, 4H), 1.21-1.20 (d, J = 6.8 Hz, 12H). MS (ESI) m/z 307.36 (M+H+).

H-Met-OPropofol (156) 2s Following procedures for the preparation of compound (151) and substituting Boc-Met-OH for Boc-Val-OH provided the title compound (156). MS (ESI) m/z 310.22 (M+H+).

so H-Phe-OPronofol (157) Following procedures for the preparation of compound (151) and substituting Boc-Phe-OH for Boc-Val-OH provided the title compound (157). 1H-NMR (400 MHz, CD30D): ~ 7.43 - 7.33 (m, SH), 7.21 (m, 3H), 4.74 (dd, J = 8.8, 6.0 Hz, 1H), 3.62 (dd, J =

14, 6.0 Hz, 1H), 3.22 (dd, J =14.4, 9.2 Hz, 1H), 2.86 (m, 2H), 1.18 (d, J =
6.8 Hz, 12H).
MS (ESI) mlz 326.25 (M+H+). MS (ESI) rnlz 326.25 (M+H+).

s H-Ser-OPropofol (158) Following procedures for the preparation of compound (151) and substituting Boc-Ser(O'Bu)-OH for Boc-Val-OH provided the title compound (158). 1H-NMR (400 MHz, CD3OD): ~ 7.21 - 7.17 (m, 3H), 4.39 (t, J = 2.8 Hz, 1H), 4.16 - 3.84 (ABq, J =10, 3.2 Hz, 2H), 1.19 (d, J = 7.2 Hz, 12H). MS (ESI) nll~ 266.33 (M+H+).
io H-Asn(OPropofol)-OH (159) To a flask containing 500 mg of 10% Pd-C was added a solution of compound (102) in methanol under nitrogen. The resulting mixture was degassed three times, after which is hydrogen was introduced via a balloon apparatus. The suspended mixture was allowed to stir vigorously for 4 h. The reaction mixture was filtered through a pad of celite and concentrated in vacuo to arrive at the title compound (159). MS (ESI) mlz 294.36 (M+H+).

2o H-Glu(OPropofol)-OH (160) To a flask containing 500 mg of 10% Pd-C was added a solution of compound (105) in methanol under nitrogen. The resulting mixture was degassed three times, after which hydrogen was introduced via a balloon apparatus. The suspended mixture was allowed to stir vigorously for 4 h. The reaction mixture was filtered through a pad of celite and as concentrated ira vacuo to arrive at the title compound (160). MS (ESI) rnlz 308.39 (M+H+).

H-Ala-Ser((3-OC(O)OPropofol)-OH (161) 3o STEP A: Boc-Ala-Ser-OtBu (162) To a solution of L-Boc-alanine (567 mg, 3 mmol) and L-serine cc-t-butyl ester in DMF (6 mL) was added diisopropylethylamine (lmL, 6.2 mmol) followed by O-(7-azabenzotriazol-1-yl)-N,N,N;N'-tetramethyluronium hexafluoro-phosphate (591mg, 3 mmol). The resulting mixture was stirred at room temperature for 14 h and then diluted with 40 mL of ethyl acetate. The organic solution was washed with 10% aqueous citric acid solution (2 x 30mL), saturated aqueous sodium bicarbonate solution (2 x 30mL) and brine (2 x 30mL). The organic layer was dried over magnesium sulfate and then concentrated ifZ
vacuo. The crude compound (162) was used without further purification.
STEP B: 2,6-Bis(isopropyl)phenoxycarbonyl chloride (163) Phosgene (13 mL, 20% in toluene) was added to propofol (3.6 g, 20 mmol) under a nitrogen atmosphere. The mixture was cooled to 0°C and N,N
dimethylaniline (3.3 mL, 26 mmol) was added dropwise. The reaction mixture was allowed to warm to room to temperature slowly and stirred for 14 h. The solvent was removed ifa vacuo.
The crude product was carried to next step without further purification.
STEP C: Boc-Ala-Ser(I3-OC(O)OPropofol)-OtBu (164) To an ice cold solution of chloroformate (163) (720 mg, 3 mmol) in dichloromethane (10 mL) was added triethylamine (0.35 mL, 6mmo1) followed by is compound (162). The resulting mixture was allowed to warm to room temperature and stirred for 12 h. The mixture was diluted with ethyl acetate (30 mL) and washed with 10%
aqueous citric acid solution (2 x 30mL), dried over MgS04, filtered and concentrated ira vacuo. The crude product (164) was used in the next step without purification.
STEP D: H-Ala-Ser((3-OC(O)OPropofol)-OH (161) 2o The crude compound (164) from above was dissolved in dichloromethane (2 mL) and treated with trifluoroacetic acid (lr mL). The resulting mixture was stirred at room temperature for 3 h. The solvent was removed ifa vacuo and the crude residue was purified by reverse phase LC/MS to afford 25 mg of the title compound (161). 1H-NMR
(400MHz, CD3OD): 8 7.12-7.20 (m, 3H), 4.59 (br. s, 3H), 3.99 (q, J= 7.2 Hz, 2H), 2.99 (m, 2H), 1.56 2s (d, J= 6.8 Hz, 3H), 1.18 (d, J= 7.2 Hz, 12H). MS (ESA m/z 381.31 (M+H+).

H-Tyr-OPropofol Hydrochloride (165) Following procedures for the preparation of compound (151) and substituting 3o Boc-Tyr-OH for Boc-Val-OH; after LC/MS purification, the residue was treated with one molar equivalent of 1 N HCl aqueous solution to provide the title compound (165).
1H-NMR (400 MHz, CD30D): 8 7.26 - 7.18 (m, SH), 6.83 - 6.81 (dd, J = 9.2, 2.8 Hz, 2H), 4.75 - 4.71 (dd, J = 9.2, 5.2 Hz, 1H), 3.59 - 3.54 (dd, J =14.4, 5.6 Hz, 1H), 3.16 - 3.10 (dd, J
=14.4, 9.2 Hz, 1H), 2.85 (m, 2H), 1.18 (d, J = 6.8 Hz, 12H). MS (ESI) m/z 343.43 (M+H+).

H-Gln-OPropofol Hydrochloride (166) Following procedures for the preparation of compound (151) and substituting Boc-Tyr-OH for Boc-Gln(tBu)-OH; after LC/MS purification, the residue was treated with one molar equivalent of 1 N HCl aqueous solution to provide the title compound (166).
IH-NMR (400 MHz, CD30D): 8 7.26 - 7.19 (m, 3H), 4.58 - 4.55 (dd, J = 7.6, 5.2 Hz, 1H), Io 2.89 (s, 2H), 2.68 (m, 2H), 2.56 - 2.52 (m, 2H), 2.32 - 2.27 (m, 2H), 1.21 (t, J = 6.8 Hz, 12H). MS (ESI) m/z 308.34 (M+H+) H-Gly-OPropofol Hydrochloride (167) is Following procedures for the preparation of compound (151) and substituting Boc-Tyr-OH for Boc-Gly-OH; after LC/MS purification, the residue was treated with one molar equivalent of 1 N HCl aqueous solution to provide the title compound (167).
1H-NMR (400 MHz, CD30D): b 7.25 - 7.19 (m, 3H), 4.27 (s, 2H), 2.95 - 2.92 (m, 2H), 1.19 (d, J = 6.8 Hz, 12H). MS (ESI) m/z 237.33 (M+H+).

H-Thr-OPropofol Hydrochloride (168) Following procedures for the preparation of compound (151) and substituting Boc-Tyr-OH for Boc-Thr(OtBu)-OH; after LC/MS purification, the residue was treated with 2s one molar equivalent of 1 N HCl aqueous solution to provide the title compound (168).
1H-NMR (400 MHz, CD30D): & 7.25 - 7.19 (m, 3H), 4.71- 4.69 (dd, J = 7.6, 5.2 Hz, 1H), 4.44 (d, J = 2.8 Hz, 1H), 3.14 (m, 1H), 2.94 (m, 1H), 1.46 (d, J = 6.8 Hz, 3H), 1.19 (d, J =
6.8 Hz, 12H). MS (ESI) m/z 281.48 (M+H+).
3o EXAMPLE 61 H-Pro-OPropofol Hydrochloride (169) Following procedures for the preparation of compound (151) and substituting Boc-Tyr-OH for Boc-Pro-OH; after LC/MS purification, the residue was treated with one molar equivalent of 1 N HCl aqueous solution to provide the title compound (169).
1H-NMR (400 MHz, CD30D): 8 7.28 - 7.21 (m, 3H), 4.85 (rn, 1H), 3.52 - 3.39 (m, 2H), 2.91 (m, 2H), 2.73 - 2.70 (m, 1H), 2.39 - 2.34 (m, 1H), 2.26 - 2.16 (m, 2H), 1.21 (t, J = 6.8 Hz, 12H). MS (ESl) m/z 277.42 (M+H+).

H-Val-Asn-OPropofol (170) A solution of Boc-Val-OH (0.28 g, 1.28 mmol) in 4 mL of DMF was treated with O-Benzotriazol-1-yl-N,N,N'N'-tetramethyluronium hexafluorophosphate (0.5 g, 1.31 mmol) io followed by diisopropylethylamine (0.5 mL, 2.9 mmol). The reaction mixture was stirred for 5 min, and then a solution of (153) in DMF (1 mL) was added. The resulting mixture was stirred at room temperature for 14 h. The mixture was then diluted with 10% aqueous citric acid solution (15 mL) and ethyl acetate (30 mL). The layers were separated and the organic layer was washed with saturated NaHCO3 aqueous solution (15 mL) and brine (2 x is 15 mL), dried over MgS04 and concentrated in vacuo. The crude product was purified by chromatography on silica gel (Biotage), eluting with a gradient of hexane to 60% ethyl acetate/hexane. The solvent was removed i~r vacuo, the residue dissolved in anhydrous dichloromethane (5 mL) and treated with trifluoroacetic acid (1 mL). The mixture was stirred at room temperature for 2 h, concentrated ifa vacuo and purified by preparative 2o LC/MS to afford the title compound (170) (267 mg, 53% yield). 1H-NMR (400 MHz, CD3OD): 8 7.22 - 7.14 (m, 3H), 5.16 (t, J = 6.4 Hz, 1H), 3.58 (s, 1H), 3.03 -2.96 (m, 4H), 2.14 (s, 1H), 1.17 (t, J = 6.8 Hz, 12H), 1.04 (d, J = 6..8 Hz, 3H), 1.00 (d, J
= 6.8 Hz, 3H).
MS (ESA m/z 408.37 (M+H+).
~s EXAMPLE 63 H-Gly-Asn-OPropofol (171) Following procedures for preparation of H-Val-Asn-OPropofol, and substituting Boc-Val-OH with Boc-Gly-OH, provided the title compound (171). 1H-NMR (400 MHz, CD30D): S 7.09-7.11(m, 3H), 5.21 (m, 1H), 3.672 (m, 2H), 2.96 - 3.04 (m, 4H), 1.18 (d, J =
30 7.2Hz, 12H). MS (ESJ] m/z 350.3(M+H+).

H-Ala-Asn-OPropofol (172) Following procedures for preparation of H-Val-Asn-OPropofol, and substituting Boc-Val-OH with Boc-Ala-OH, provided the title compound (172). 1H-NMR (400 MHz, s CD30D): ~ 7.09 - 7.11(m, 3H), 5.21 (m, 1H), 3.98 (m, 1H), 2.96 - 3.04 (m, 4H), 1.48 - 1.5 (d, J = 9.8Hz, 3H), 1.18 ( d, J = 7.2Hz, 12H). MS (ESI) m/z 364.5(M+H+).

H-Gln-Asn-OPropofol (173) Following procedures for preparation of H-Val-Asn-OPropofol, and substituting Boc-Val-OH with Boc-Gln-OH, provided the title compound (173). 1H-NMR (400 MHz, CD30D): S 7.14 - 7.21(m, 3H), 5.16 - 5.19 (m, 1H), 3.86 - 3.95 (m, 1H), 2.95 -3.00 (m, 4H), 2.5 (m, 2H), 2.14(m, 2H), 1.18 (d, J = 7.2Hz, 12H). MS (ESI) m/z 421.3 (M+H+).
1 s EXAMPLE 66 H-Ser-Asn-OPropofol (174) Following procedures for preparation of H-Val-Asn-OPropofol, and substituting Boc-Val-OH with Boc-Ser-OH, provided the title compound (174). 1H-NMR (400 MHz, CD30D): ~ 7.14 - 7.21 (m, 3H), 5.16 - 5.19 (m, 1H), 3.9 - 3.94(m, 2H), 3.86 -3.89 (m, 1H), 20 2.95 - 3.00 (m, 4H), 1.18 (d, J = 7.2Hz, 12H). MS (ESI) m/z 380.3 (M+H+).

H-Dap-Asn-OPropofol (175) Following procedures for preparation of H-Val-Asn-OPropofol, and substituting 2s Boc-Val-OH with Boc-Dap(Boc)-OH, provided the title compound (175). 1H-NMR
(400 MHz, CD30D): ~ 7.20 - 7.14 (m, 3H), 5.16 - 5.12 (m, 1H), 3.73 (t, J = 8.0 Hz, 1H), 3.27 -3.23 (m, 1H), 3.08 - 2.94 (m, SH), 1.18-1.14 (t, J = 6.8 Hz, 12H). MS (ESI) m/z 379.39 (M+H+).
3o EXAMPLE 68 H-Asn-Asn-OPropofol (176) Following procedures for preparation of H-Val-Asn-OPropofol, and substituting Boc-Val-OH with Boc-Asp(OtBu)-OH, provided the title compound (176). 1H-NMR
(400 MHz, CD30D): 8 7.19 - 7.14 (m, 3H),,, 5.19 (dd, J = 8, 4.8 Hz, 1H), 4.14 (dd, J = 9.6, 4 Hz, 1H), 3.04 - 2.89 (m, 4H), 2.81 - 2.75 (dd, J =16.8, 2.4 Hz, 1H), 2.59 - 2.52 (dd, J =14.4, 8.4 Hz, 1H), 1.18 (d, J = 6.8 Hz, 6H), 1.16 (d, J = 6.8 Hz, 6H). MS (ESI) m/z 408.37 (M+H+).
s H-Tyr-Asn-OPropofol (177) Following procedures for preparation of H-Val-Asn-OPropofol, and substituting Boc-Val-OH with Boc-Tyr-OH, provided the title compound (177). 1H-NMR (400 MHz, CD30D): ~ 7.22 - 7.15 (m, 3H), 7.10 - 7.08 (d, J = 8.4 Hz, 2H), 6.70 (d, J =
8.4 Hz, 2H), 5.18 (t, J = 6.0 Hz, 1H), 3.97 - 3.94 (dd, J = 8.4, 5.2 Hz, 1H), 3.18 - 3.13 (dd, J =14.4, 5.2 Hz, 1H), 3.03 - 2.98 (m, 4H), 2.88 - 2.82 (dd, J =16.8, 10 Hz, 1H), 1.18 -1.15 (t, J = 6.8 Hz, 12H). MS (ESI) m/z 456.64 (M+H+).
i s EXAMPLE 70 H-Asp-Ala-OPropofol (178) Following procedures for preparation of H-Val-Asn-OPropofol, substituting Boc-Val-OH with Boc-Asp(OtBu)-OH and compound (153) with (152), provided the title compound (178). iH-NMR (400 MHz, CD30D): 8 7.22 - 7.14 (m, 3H), 4.80 - 4.75 (q, J =
20 7.2 Hz, 1H), 4.15 - 4.12 (m, 1H), 2.97 - 2.91 (m, 2H), 2.82 - 2.76 (dd, J =
16.4, 3.6 Hz, 1H), 2.58 - 2.51 (dd, J = 17.2, 10.4 Hz, 1H), 1.64 (d, J = 7.6 Hz, 3H), 1.18 (d, J = 6.4 Hz, 12H). MS (ESI) m/z 365.17 (M+H+).

2s H-Val-Ala-OPropofol (179) Following procedures for preparation of H-Val-Asn-OPropofol, substituting compound (153) with (152), provided the title compound (179). 1H-NMR (400 MHz, CD30D): 8 7.22 - 7.14 (m, 3H), 4.83 - 4.78 (q, J = 7.2 Hz, 1H), 3.66 (d, J =
5.6 Hz, 1H), 3.04 - 2.94 (m, 2H), 2.22 - 2.18 (m, 1 H), 1.64 (d, J = 7.2 Hz, 3H), 1.17 (d, J = 6.4 Hz, 30 12H), 1.08 (d, J = 6.8 Hz, 3H), 1.05 (d, J = 7.2 Hz, 3H). MS (ESI) m/z 349.18 (M+H+).

H-Dap-Ala-OPropofol (180) Following procedures for preparation of H-Val-Asn-OPropofol, substituting Boc-Val-OH with Boc-Dap(Boc)-OH and compound (153) with (152), provided the title s compound (180). 1H-NMR (400 MHz, CD30D): 8 7.22 - 7.14 (m, 3H), 4.80 - 4.75 (q, J =
7.6 Hz, 1H), 3.81- 3.77 (dd, J = 8.4, 5.2 Hz, 1H), 3.27 - 3.22 (dd, J =13.2, 5.2 Hz, 1H), 3.05 - 3.00 (dd, J =13.2, 8.4 Hz, 1H), 3.02 - 2.91 (m, 2H), 1.67 (d, J = 7.6 Hz, 3H), 1.18 (d, J = 6.8 Hz, 12H). MS (ESI) m/z 336.30 (M+H+).
i o EXAMPLE 73 H-Asp-Ser-OPropofol (181) Following procedures for preparation of H-Val-Asn-OPropofol, substituting Boc-Val-OH with Boc-Asp(OtBu)-OH and compound (153) with (158), provided the title compound (181). 1H-NMR (400 MHz, CD30D): ~ 7.21- 7.14 (m, 3H), 4.82 - 4.77 (m, ~s 1H), 4.27 - 4.24 (dd, J = 8.8, 4.0 Hz, 1H), 4.19 - 4.15 (dd, J =10.4, 4.8 Hz, 1H), 4.03 -3.99 (dd, J =11.2, 4.0 Hz, 1H), 3.04 - 2.94 (m, 2H), 2.97 - 2.91 (dd, J =
17.6, 4.8 Hz, 1H), 2.79 - 2.73 (dd, J =17.6, 9.2 Hz, 1H), 1.17 (m, 12H). MS (ESI) m/z 381.4 (1VI+H+).

2o H-Val-Ser-OPropofol (182) Following procedures for preparation of H-Val-Asn-OPropofol, substituting compound (153) with (158), provided the title compound (182) as the formate salt.
1H-NMR (400 MHz, CD30D): ~ 8.48 (s, 1H), 7.29 - 7.14 (m, 3H), 4.48 (m, 1H), 4.14 -4.11 (m, 1 H), 4.04 - 4.00 (m, 1 H), 3 .64 (t, J = 5 .2 Hz, 1 H), 3 .05 - 3 .02 (m, 2H), 2.21 (m, 2s 1H), 1.17 (m, 12H), 1.05 (m, 6H). MS (ESI) m/z 365.34 (M+H+).

H-Ala-Tyr-OPropofol (183) Following procedures for preparation of H-Val-Asn-OPropofol, substituting Boc-3o Val-OH with Boc-Ala-OH and compound (153) with (165), provided the title compound (183). 1H-NMR (400 MHz, CD3OD): 8 7.20 - 7.12 (m, 5H), 6.73 (d, J = 7.6 Hz, 2H), 5.05 - 5.01 (dd, J = 8.8, 6.4 Hz, 1H), 3.64 (m, 1H), 3.29 - 3.24 (m, 1H), 3.04 -2.98 (dd, J =

13.6, 9.2 Hz, 1H), 2.90 (m, 1H), 2.61 (m, 1H), 1.37 (d, J = 6.8 Hz, 3H), 1.12 (m, 12H). MS
(ESI) m/z 413.45 (M+H+).

s H-Glu-Tyr-OPropofol (184) Following procedures for preparation of H-Val-Asn-OPropofol, substituting Boc-Val-OH with Boc-Glu(OtBu)-OH and compound (153) with (165), provided the title compound (184). 1H-NMR (400 MHz, CD30D): 8 7.20 - 7.13 (m, SH), 6.73 (d, J =
8.0 Hz, 2H), 5.05 - 5.01 (dd, J = 9.6, 6.0 Hz, 1H), 3.85 - 3.82 (dd, J = 8.0, 4.4 Hz, 1H), 3.36 - 3.32 i o (m, 1 H), 3 .05 - 2.99 (dd, J =14.0, 9.6 Hz, 1 H), 2.94 (m, 1 H), 2.63 (m, 1 H), 2.51- 2.41 (m, 2H), 2.11-1.96 (m, 2H), 1.12 (m, 12H). MS (ESI) m/z 471.43 (M+H+) H-Dap-Tyr-OPropofol (185) is Following procedures for preparation of H-Val-Asn-OPropofol, substituting Boc-Val-OH with Boc-Dap(Boc)-OH and compound (153) with (165), provided the title compound (185) as the formate salt. iH-NMR (400 MHz, CD30D): b 8.45 (s, 1H), 7.21-7.13 (m, SH), 6.74 (d, J = 8.4 Hz, 2H), 5.04 - 5.01 (dd, J = 9.6, 6.0 Hz, 1H), 3.58 - 3.55 (dd, J = 8.8, 5.2 Hz, 1H), 3.38 - 3.35 (m, 1H), 3.13 - 3.04 (m, 2H), 2.93 (m, 1H), 2.87 - 2.82 20 (dd, J =12.4, 8.4 Hz, 1H), 2.70 (m, 1H), 1.14 (m, 12H). MS (ESI) m/z 428.42 (M+H+).

H-Ser-Tyr-OPropofol (186) Following procedures for preparation of H-Val-Asn-OPropofol, substituting Boc-2s Val-OH with Boc-Ser-OH and compound (153) with (165), provided the title compound (186). 1H-NMR (400 MHz, CD30D): 8 7.21- 7.13 (m, SH), 6.74 (d, J = 8.4 Hz, 2H), 5.08 - 5.04 (dd, J = 8.8, 6.8 Hz, 1H), 3.88 - 3.85 (dd, J =10.8, 4.0 Hz, 1H), 3.75 -3.63 (m, 2H), 3.31- 3.27 (m, 1H), 3.06 - 3.00 (dd, J =14.0, 9.2 Hz, 1H), 2.89 (m, 1H), 2.58 (m, 1H), 1.14 (m, 12H). MS (ESI) m/z 429.44 (M+H+).

H-Pro-Tyr-OPropofol (187) Following procedures for preparation of H-Val-Asn-OPropofol, substituting Boc-Val-OH with Boc-Pro-OH and compound (153) with (165), provided the title compound s (187). IH-NMR (400 MHz, CD30D): ~ 7.21- 7.13 (m, SH), 6.74 (d, J = 8.4 Hz, 2H), 5.05 - 5.02 (dd, J = 9.6, 6.0 Hz, 1H), 4.08 - 4.05 (dd, J = 8.4, 4.8 Hz, 1H), 3.37 -3.35 (m, 1H), 3.29 - 3.13 (m, 2H), 3.06 - 3.00 (dd, J =14.0, 9.6 Hz, 1H), 2.93 (m, 1H), 2.66 (m, 1H), 2.34 (m, 1H), 1.97 -1.87 (m, 3H), 1.13 (m, 12H). MS (ESI) rnlz 439.42 (M+H+).
1 o EXAMPLE 80 H-Val-Tyr-OPropofol (188) Following procedures for preparation of H-Val-Asn-OPropofol, substituting compound (153) with (165), provided the title compound (188) as the trifluoroacetate salt.
1H-NMR (400 MHz, CD30D): 8 7.18 - 7.13 (m, SH), 6.74 (d, J = 8.8 Hz, 2H), 5.11-5.07 Is (dd, J = 9.6, 6.0 Hz, 1H), 3.67 (d, J = 4.8 Hz, 1H), 3.37 - 3.32 (dd, J =
14.0, 5.6 Hz, 1H), 3.06 - 3.00 (dd, J =14.0, 9.2 Hz, 1H), 2.93 (m, 1H), 2.66 (m, 1H), 2.24 (m, 1H), 1.09 (m, 15H), 1.02 (d, J = 6.8 Hz, 3H). MS (ESI) m/z 442.39 (M+H+).

2o H-Asn-Tyr-OPropofol (189) Following procedures for preparation of H-Val-Asn-OPropofol, substituting Boc-Val-OH with Boc-Asn-OH and compound (153) with (165), provided the title compound (189) as the trifluoroacetate salt. 1H-NMR (400 MHz, CD30D): ~ 7.19 - 7.13 (m, 5H), 6.74 (d, J = 8.0 Hz, 2H), 5.04 - 5.00 (dd, J =10.4, 5.6 Hz, 1H), 4.17 - 4.14 (dd, J
=10.0, 4.0 Hz, 2s 1H), 3.41- 3.37 (dd, J =14.0, 5.2 Hz, 1H), 3.03 - 2.87 (m, 3H), 2.72 - 2.65 (m, 2H), 1.14 (m, 12H). MS (ESI) m/z 457.36 (M+H+).

H-Lys-Tyr-OPropofol (190) 3o Following procedures for preparation of H-Val-Asn-OPropofol, substituting Boc-Val-OH with Boc-Lys(Boc)-OH and compound (153) with (165), provided the title compound (190) as the trifluoroacetate salt. 1H-NMR (400 MHz, CD30D): 8 7.22 -7.14 (m, SH), 6.74 (d, J = 8.8 Hz, 2H), 5.08 - 5.04 (dd, J = 10.4, 5.2 Hz, 1H), 3.88 - 3.85 (dd, J =

6.0, 4.8 Hz, 1 H), 3.43 - 3.3 8 (dd, J =14.4, 5.2 Hz, 1 H), 3.06 - 3.00 (dd, J
=14.0, 10.0 Hz, 1H), 3.06 - 3.00 (m, 1H), 2.84 -2.79 (t, J = 7.6 Hz, 2H), 2.71 (m, 1H), 1.91-1.85 (q, J =
8.0 Hz, 2H), 1.66 -1.44 (m, 4H), 1.14 (d, J = 7.2 Hz, 12H). MS (ESI) m/z 472.38 (M+H~
s EXAMPLE 83 H-Asu-Tyr-OPropofol (191) Following procedures for preparation of H-Val-Asn-OPropofol, substituting Boc-Val-OH with Boc-Asp(tOBu)-OH and compound (153) with (165), provided the title compound (191) as the trifluoroacetate salt. 1H-NMR (400 MHz, CD30D): 8 7.20 -7.13 l o (m, SH), 6.74 (d, J = 8.4 Hz, 2H), 5.03 - 4.99 (dd, J = 9.6, 6.0 Hz, 1H), 4.07 - 4.03 (dd, J =
10.0, 4.0 Hz, 1H), 3.35 - 3.30 (dd, J =13.6, 5.6 Hz, 1H), 3.03 - 2.97 (dd, J
=14.0, 10.0 Hz, 1H), 2.92 (m, 1H), 2.80 -2.75 (dd, J =16.8, 4.0 Hz, 1H), 2.63 (m, 1H), 2.56 -2.49 (dd, J =
17.2, 10.0 Hz, 1H), 1.12 (s, 12H). MS (ESI) m/z 458.31 (M+H+).
1 s EXAMPLE 84 H-Gly-Tyr-OPropofol (192) Following procedures for preparation of H-Val-Asn-OPropofol, substituting Boc-Val-OH with Boc-Gly-OH and compound (153) with (1,65), provided the title compound (192) as the trifluoroacetate salt. 1H-NMR (400 MHz, CD30D): 8 7.21- 7.13 (m, SH), 6.74 20 (d, J = 8.4 Hz, 2H), 5.08 - 5.04 (dd, J = 9.6, 5.6 Hz, 1H), 3.64 (dd, J =
23.2, 16.0 Hz, 2H), 3.38 - 3.34 (dd, J =14.0, 5.6 Hz, 1H), 3.03 - 2.97 (dd, J =14.0, 9.6 Hz, 1H), 2.92 (m, 1H), 2.68 (m, 1H), 1.13 (m, 12H). MS (ESI) m/z 400.34 (M+H+).

2s H-Ala-Phe-OPropofol (193) To a solution of (157) (332 mg, 1.0 mmol) and Boc L-alanine (231 mg, 1.2 mmol) in DMF (4 mL) was added diisopropylethylamine (532 p,L, 3.0 mmol) followed by O-(7-azabenzotriazol-1-yl)-N,N,N;N'-tetramethyluronium hexafluoro-phosphate (465 mg, 1.2 mmol). The resulting mixture was stirred at room temperature for 12 h and then diluted 3o with 20 mL of ethyl acetate. The organic solution was washed with 10%
aqueous citric acid solution (2 x 20 mL), saturated aqueous sodium bicarbonate solution (2 x 20 mL) and brine (2 x 20 mL). The organic layer was dried over magnesium sulfate and then concentrated i~c vacuo. The resulting residue was treated with 20% TFA (8 mL) in dichloromethane (32 mL) at room temperature for 30 min. After removing the solvent, the resulting residue was purified by preparative LC/MS to afford the title compound (193) (100 mg, 25%
yield).
1H-NMR (400 MHz, CD30D): 8 7.37 - 7.15 (m, 8H), 5.13 (dd, J = 9.6, 5.6 Hz, 1H), 3.80 (m, 1H), 3.46 (dd, J =14.0, 6.0 Hz, 1H), 3.15 (dd, J =16.8, 7.6 Hz, 1H), 1.46 (dd, J = 7.2, s 2.8 Hz, 1H), 1.13 (m, 12H). MS (ESI) fnlz 397.37 (M+H~).

H-Art-Phe-OPropofol (194) Following procedures for the preparation of compound H-Ala-Phe-OPropofol and to substituting Boc-Ala-OH with Tris-Boc-L-arginine provided the title compound (194).
1H-NMR (400 MHz, CD30D): 8 7.38-7.15 (m, 8H), 5.13 (dd, J = 10.0, 4.8 Hz, 1H), 3.89 (t, J = 6.4 Hz, 1H), 3.53 (dd, J =14.4, 4.8 Hz, 1H), 3.16 (m, 2H), 3.07 - 2.74 (m, 2H), 1.91 (m, 2H), 1.70 (m, 2H), 1.23 - 1.10 (m, 12H). MS (ESI) m/z 482.6 (M+H+).
is EXAMPLE 87 H-Asp-Phe-OPropofol (195) Following procedures for the preparation of compound H-Ala-Phe-OPropofol and substituting Boc-Ala-OH with Boc-Asp(OtBu)-OH provided the title compound (195).
IH-NMR (400 MHz, CD3OD): 8 7.36 - 7.13 (m, 8H), 5.07 (dd, J =10, 5.6 Hz, 1H), 3.89 20 (dd, J = 9.6, 3.6 Hz, 1H), 3.45 (dd, J =14.0, 5.2 Hz, 1H), 3.10 (dd, J
=14.0, 10 Hz, 1H), 2.93 (m, 1H), 2.75 (m, 2H), 2.50 (dd, J =17.2, 10.4 Hz, 1H), 1.23 - 1.03 (m, 12H). MS
(ESI) fnlz 441.3 (M+H~.

2s H-Gln-Phe-OPropofol (196) Following procedures for the preparation of compound H-Ala-Phe-OPropofol and substituting Boc-Ala-OH with Boc-Gln-OH provided the title compound (196). 1H-NMR.
(400 MHz, CD3OD): b 7.38-7.15 (m, 8H), 5.11 (dd, J = 10.0, 5.6 Hz, 1H), 3.89 (t, J = 6.0 Hz, 1H), 3.49 (dd, J = 14.0, 4.8 Hz, 1H), 3.14 (dd, J =14.0, 10.0 Hz, 1H), 2.98 (m, 1H), 30 2.71 (m, 1H), 2.46 (t, J = 7.2 Hz, 2H), 2.08 (m, 2H), 1.13 (m, 12H). MS
(ESI) m/z 454.3 (M+H~

H-Glu-Phe-OPropofol (197) Following procedures for the preparation of compound H-Ala-Phe-OPropofol and substituting Boc-Ala-OH with Boc-Glu(OtBu)-OH provided the title compound (197).
s 1H-NMR (400 MHz, CD30D): 8 7.37 - 7.14 (m, 8H), 5.10 (dd, J =10.0, 5.6 Hz, 1H), 3.83 (dd, J = 8.0, 4. 8 Hz, 1 H), 3 .47 (dd, J =14.0, 5 .6 Hz, 1 H), 3 .13 (dd, J
=14.0, 10.0 Hz, 1 H), 2.95 (m, 1H), 2.69 (m, 1H), 2.43 (m, 2H), 2.08 (m, 2H), 1.13 (m, 12H). MS
(ESI) m/z 455.7 (M+H+).
to EXAMPLE 90 H-Gly-Phe-OPropofol (198) Following procedures for the preparation of compound H-Ala-Phe-OPropofol and substituting Boc-Ala-OH with Boc-Gly-OH provided the title compound (198). 1H-NMR
(400 MHz, CD30D): ~ 7.36 - 7.15 (m, 8H), 5.14 (dd, J = 10.0, 5.6 Hz, 1H), 3.64 (ABq, J =
is 28.4, 16.0 Hz, 2H), 3.45 (dd, J = 14.0, 4.0 Hz, 1H), 3.10 (dd, J =14.0, 10.0 Hz, 1H), 2.96 (m, 1H), 2.75 (m, 1H), 1.14 (d, J = 6.8 Hz, 12H). MS (ESI) m/z 383.3 (M+H+).

H-His-Phe-OPropofol (199) 20 Following procedures for the preparation of compound H-Ala-Phe-OPropofol and substituting Boc-Ala-OH with Boc-His(Boc)-OH provided the title compound (199).
1H-NMR (400 MHz, CD30D): b 8.09 (s, 1H), 8.06(s, 1H), 7.38 - 7.11 (m, 8H), 5.13 (m, 1H), 4.12 (m, 1H), 3.52 (dd, J = 14.4, 5.2 Hz, 1H), 3.27 - 3.06 (m, 2H), 2.98 -2.76 (m, 2H), 2.96 (m, 1H), 1.14 (m, J =12H). MS (ESI) m/z 463.3 (M+H+).

H-Pro-Phe-OPronofol (200) Following procedures for the preparation of compound H-Ala-Phe-OPropofol and substituting Boc-Ala-OH with Boc-Pro-OH provided the title compound (200). 1H-NMR
(400 MHz, CD30D): S 7.38-7.14 (m, 8H), 5.12 (dd, J = 10.4, 5.6 Hz, 1H), 4.19 (dd, J =
14.4, 5 .2 Hz, 1 H), 3 .13 (dd, J = 14.0, 10.0 Hz, 1 H), 2.96 (m, 1 H), 2.72 (m, 1 H), 1.13 (m, J =
12H). MS (ESI) m/z 424.6 (M+H+).

H-Ser-Phe-OPropofol (201) Following procedures for the preparation of compound H-Ala-Phe-OPropofol and substituting Boc-Ala-OH with Boc-Ser-OH provided the title compound (201). 1H-NMR
s (400 MHz, CD30D): 8 7.36-7.14 (m, 8H), 5.14 (dd, J = 9.6, 6.4 Hz, 1H), 3.95 (dd, J =10.8, 4.4 Hz, 1H), 3.70 (dd, J =11.2, 8.0 Hz, 1H), 3.43 (dd, J =13.6, 5.6 Hz, 1H), 3.14 (dd, J =
14, 9.6 Hz, 1H), 2.92 (m, 1H), 2.64 (m, 1H), 1.12 (m, 12H). MS (ESI) m/z 413.3 (M+H+) to H-Thr-Phe-OPropofol (202) Following procedures for the preparation of compound H-Ala-Phe-OPropofol and substituting Boc-Ala-OH with Boc-Thr-OH provided the title compound (202). 1H-NMR
(400 MHz, CD3OD): 8 7.38 - 7.13 (m, 8H), 5.14 (dd, J = 8.8, 5.6 Hz, 1H), 3.92 (m, 1H), 3 . 5 3 (d, J = 7.2 Hz, 1 H), 3 .45 (dd, J =14. 0, 5 .2 Hz, 1 H), 3 .17 (dd, J
=14.4, 9.2 Hz, 1 H), is 2.96 (m, 1H), 2.66 (m, 1H), 1.30 (d, J = 6.0 Hz, 3H), 1.11 (m, 12H). MS
(ESI) m/z 427.4 (M+I~.

H-Trp-Phe-OPropofol (203) 2o Following procedures for the preparation of compound and substituting Boc-Ala-OH
with Boc-Trp-OH provided the title compound (203). 1H-NMR (400 MHz, CD30D): 8 7.63 (d, J = 8.0 Hz, 1H), 7.34 - 7.00 (m, 12H), 5.13 (dd, J = 8.8, 6.0 Hz, 1H), 3.86 (dd, J = 8.4, 4.4 Hz, 1H), 3.37 (dd, J = 14.0, 6.0 Hz, 1H), 3.07 (dd, J =13.6, 8.8 Hz, 1H), 2.99 (m, 2H), 2.69 (m, 1H), 1.13 (m, 12H). MS (ESI) m/z 512.4 (M+H+).
2s H-Tyr-Phe-OPropofol (204) Following procedures for the preparation of compound H-Ala-Phe-OPropofol and substituting Boc-Ala-OH with Boc-Tyr-OH provided the title compound (204). 1H-NMR
(400 MHz, CD30D): ~ 7.36 - 7.15 (m, 8H), 7.08 (d, J = 8.0 Hz, 2H), 6.72 (d, J
= 8.0 Hz, 2H), 5.15 (dd, J = 10.0, 5.6 Hz, 1H), 3.94 (dd, J = 9.2, 4.0 Hz, 1H), 3.49 (dd, J =14.0, 5.6 Hz, 1 H), 3 .18 (m, 2H), 2. 9 8 (m, 1 H), 2.82 (dd, J =14.4, 8. 8 Hz, 1 H), 2.72 (m, 1 H), 1.15 (m, 12H). MS (ESI) m/z 512.4 (M+H+).

H-Val-Phe-OPropofol (205) Following procedures for the preparation of compound H-Ala-Phe-OPropofol and s - substituting Boc-Ala-OH with Boc-Val-OH provided the title compound (205).
iH-NMR
(400 MHz, CD30D): 8 7.37 - 7.14 (m, 8H), 5.16 (dd, J = 10.0, 5.6 Hz, 1H), 3.59 (d, J = 5.2 Hz, 1 H), 3 .44 (dd, J = 14.0, 5.6 Hz, 1 H), 3 .13 (dd, J = 14.0, 9.6 Hz, 1 H), 2.98 (m, 1 H), 2.68 (m, 1H), 2.20 (m, 1H), 1.11 (m, 12H), 1.07-0.98 (dd, J = 29.6, 7.2 Hz, 6H). MS
(ESI) m/z 425.4 (M+H+).
io H-Asp-Ser((3-OC(O)OPropofol)-OH (206) Following procedures for the preparation of compound (161) and substituting Boc-Ala-OH with Boc-Asp(OtBu)-OH in Step A provided the title compound (206). 1H-NMR
is (400 MHz, CD30D): 8 7.16 (m, 3H), 4.72 (dd, J = 5.2, 3.6 Hz, 1H), 4.63 (dd, J =11.6, 5.6 Hz, 1H), 4.55 (dd, J =11.2, 3.2 Hz, 1H), 4.21 (dd, J =10, 4 Hz, 1H), 2.99 (m, 3H), 2.70 (dd, J =17.6, 10 Hz, 1H), 1.18 (d, J = 7.2 Hz, 12H). MS (ESI) m/z (M+H+).

2o H-Lys-Ser((3-OC(O)OPropofol)-OH (207) ' Following procedures for the preparation of compound (161) and substituting Boc-Ala-OH with Boc-Lys(Boc)-OH in Step A provided the title compound (207). iH-NMR
(400 MHz, CD3OD): 8 7.16 (m, 3H), 4.65 (t, J = 5.2 Hz, 1H), 4.56 (m, 2H), 3.92 (t, J = 6.8 Hz, 1H), 2.97 (m, 4H), 2.02-1.84 (m, 2H), 1.71 - 1.54 (m, 2H), 1.18 (d, J =
7.2 Hz, 12H).
2s MS (ESI) m/z (M+H+) H-Ser-Ser((3-OC(O)OPropofol)-OH (208) Following procedures for the preparation of compound (161) and substituting Boc-so Ala-OH with Boc-Ser(OtBu)-OH in Step A provided the title compound (208).

(400 MHz, CD3OD): 8 7.16 (m, 3H), 4.60 (m, 3H), 3.95 (m, 3H), 2.99 (m, J =
2H), 1.18 (d, J = 7.2 Hz, 12H). MS (ESI) m/z 397.7 (M+H~).

H-Tyr-Ser((3-OC(O)OPropofol)-OH (209) Following procedures for the preparation of compound (161) and substituting Boc-Ala-OH with Boc-Tyr-OH in Step A provided the title compound (209). 1H-NMR
(400 s MHz, CD30D): ~ 7.15 (m, SH), 6.76 (d, J = 8.8 Hz, 2H), 4.58 (m, 3H), 4.08 (dd, 8.8, 4.8 Hz, 1H), 2.97 (m, 3H), 1.17 (d, J = 6.8 Hz, 12H). MS (ESI) m/z 473.7 (M+H+).

H-Ala-Thr((3-OC(O)OPropofol)-OH (210) to Following procedures for the preparation of compound (161) and substituting Boc-Ser(OtBu)-OH with Boc-Thr(OtBu)-OH in Step A provided the title compound (210).
iH-NMR (400 MHz, CD3OD): b 7.16 (m, 3H), 4.49 (m, 1H), 4.09 (q, J = 7.2 Hz, 1H), 2.95 (m, 2H), 1.57 (d, J = 7.2 Hz, 3H), 1.41 (d, J = 6.4 Hz, 3H), 1.18 (dd, J = 6.8 Hz, 1.6 Hz, 12H). MS (ESI) rnlz 395.8 (M+H~.

H-Asn-Thr((3-OC(O)OPropofol)-OH (211) Following procedures for the preparation of compound H-Ala-Thr(y-OC(O)OPropofol)-OH and substituting Boc-Asn-OH for Boc-Ala-OH in Step 2o A provided the title compound (211). 1H-NMR (400 MHz, CD30D): 8 7.16 (m, 3H), 5.49 (m, 1H), 4.36 (dd, J = 10, 3.6 Hz, 1H), 3.04 (dd, J =17.2, 3.2 Hz, 1H), 2.94 (m, 2H), 2.78 (m, 1H), 1.41 (d, J = 6.4 Hz, 3H), 1.18 (dd, J = 6.8 Hz, 1.6 Hz, 12IT). MS
(ESI) nalz 438.8 (M+H+).
2s EXAMPLE 104 H-Lys-Thr((3-OC(O)OPropofol)-OH (212) Following procedures for the preparation of compound H-Ala-Thr(y-OC(O)OPropofol)-OH and substituting Boc-Lys(Boc)-OH for Boc-Ala-OH
in Step A provided the title compound (212). 1H-NMR (400 MHz, CD30D): b 7.17 (m, 3H), 30 5.50 (m, 1H), 4.09 (t, J = 6.4 Hz, 1H), 2.94 (m, 2H), 1.98 (m, 2H), 1.74 (m, 2H), 1.60 (m, 2H), 1.42 (d, J = 6.4 Hz, 3H), 1.18 (d, J = 6.8 Hz, 12H). MS (ESI) nz/z 452.9 (M+H+).

H-Ser-Thr(a-OC(O)OPropofol)-OH (213) Following procedures for the preparation of compound H-Ala-Thr(y-OC(O)OPropofol)-OH and substituting Boc-Ser(OtBu)-OH for Boc-Ala-OH in s Step A provided the title compound (213). 1H-NMR (400 MHz, CD30D): 8 7.16 (m, 3H), 5.49 (m, 1H), 4.11 (dd, J = 6.8, 4 Hz, 1H), 3.87 (dd, J = 12.0, 7.2 Hz, 1H), 2.95 (m, 2H), 1.42 (d, J = 6.4 Hz, 3H), 1.18 (d, J = 6.8 Hz, 12H). MS (ESI) nalz 411.8 (M+H+).

H-Val-Thr((3-OC(O)OPropofol)-OH (214) Following procedures for the preparation of compound H-Ala-Thr(y-OC(O)OPropofol)-OH and substituting Boc-Val-OH for Boc-Ala-OH in Step A provided the title compound (214). 1H-NMR (400 MHz, CD30D): 8 7.16 (m, 3H), 3.89 (d, J = 5.6 Hz, 1H), 2.95 (m, 2H), 2.30 (m, 1H), 1.42 (d, J = 6.4 Hz, 3H), 1.18 (dd, J = 6.8 ~s Hz, 1.6 Hz, 12H), 1.12 (dd, J = 20.4, 7.2 Hz, 6H). MS (ESI) f~alz 423.8 (M+H+).

H-Ala-Cys((3-SC(O)OPropofol)-OH (215) STEP A: (Boc-Ala-Cys-OtSu)2 (216) 2o To a mixture of cystine tent-butyl diester hydrochloride (0.5 g, 1.17 mmol) and Boc-Ala-OH (0.45 g, 2.38 mmol) in DMF (8 mL) was added O-Benzotriazol-1-yl-N,N,N'N'-tetramethyluronium hexafluorophosphate (0.9 g, 237 mmol) followed by triethylamine (0.45 mL, 258 mmol). The resulting reaction mixture was stirred for 14 h at room temperature, and then diluted with 10% citric acid aqueous solution (20 mL) and ethyl 2s acetate (50 mL). The layers were separated and the organic layer was washed with saturated NaHC03 aqueous solution (30 mL), brine (2 x 20 mL), dried over MgS04 and concentrated is vacuo. The crude residue was purified by silica gel chromatography (hexane to 60% ethyl acetate/hexane) to afford 0.77 g (93% yield) of the desired product (216).
3o STEP B: Eoc-Ala-Cys-OtBu (217) To a solution of (216) (0.77 g, 1.1 mmol) in ethanol (3 mL) was added indium powder (0.68 g, 5.9 mmol) and ammonium chloride (0.15 g, 2.86 mmol). The resulting mixture was stirred under reflux for 14 h, then cooled to room temperature and filtered through a short plug of silica gel. The silica gel plug was washed with ethyl acetate and the filtrate was concentrated ii2 vacuo. The crude product (217) was carried to the next step without further purification.
STEP C: H-Ala-Cys((3-SC(O)OPropofol)-OH (215) s To a cooled solution (0 °C) of crude (217) (0.5 g, 1.43 mmol) in dichloromethane (4 mL) was added triethylamine (0.22 mL, 1.57 mmol) followed by 2,6-bis(isopropyl)phenoxycarbonyl chloride (163) (0.37 g, 153 mmol). The resulting mixture was stirred at room temperature for 15 h, and then diluted with 10% citric acid aqueous solution (10 mL) and ethyl acetate (30 mL). The layers were separated and the organic to layer was washed with brine (30 mL), dried over MgS04 and concentrated iya vacuo. The crude residue was dissolved in dichloromethane (4 mL) and treated with 4 N HCl in dioxane (3 mL), followed by trifluoroacetic acid (0.5 mL). The mixture was stirred at room temperature for 14 h the solvent was removed ifz vacu~. The crude product was purified by preparative LCIMS to afford the title compound (215) (128 mg, 22% yield). 1H-NMR (400 is MHz, CD30D): 8 7.21- 7.14 (m, 3H), 4.49 - 4.46 (dd, J = 7.6, 4.8 Hz, 1H), 3.88 - 3.86 (q, J = 6.8 Hz, 1H), 3.64 - 3.59 (dd, J =13.6, 4.8 Hz, 1H), 3.34 - 3.32 (m, 1H), 2.96 (m, 2H), 1.52 (d, J = 6.8 Hz, 3H), 1.19 (d, J = 6.8 Hz, 6H), 1.17 (d, J = 6.8 Hz, 6H).
MS (ESI] m/z 397.77 (M+H+).
2o EXAMPLE 108 H-Lys-Cys(a-SC(O)OPropofol)-OH (218) Following procedures for the preparation of H-Ala-Cys((3-SC(O)OPropofol)-OH, and substituting Boc-Ala-OH with Boc-Lys(Boc)-OH, provided the title compound (218).
1H-NMR (400 MHz, CD3OD): 8 7.22 - 7.14 (m, 3H), 4.53 - 4.50 (dd, J = 8.8, 4.8 Hz, 1H), 2s 3.87 (t, J = 6.0 Hz, 1H), 3.64 - 3.59 (dd, J =13.6, 4.8 Hz, 1H), 3.27 -3.22 (dd, J =13.4, 8.4 Hz, 1H), 3.00 - 2.91 (m, 4H), 1.96 -1.87 (m, 2H), 1.71-1.65 (m, 2H), 1.59 -1.52 (m, 2H), 1.19 (d, J = 7.2 Hz, 6H), 1.17 (d, J = 6.8 Hz, 6H). MS (ESA ~ralz 454.85 (M+H+).

3o H-Ser-Cys((3-SC(O)OPropofol)-OH (219) Following procedures for the preparation of H-Ala-Cys([3-SC(O)OPropofol)-OH, and substituting Boc-Ala-OH with Boc-Ser(OtBu)-OH, provided the title compound (219).
1H-NMR (400 MHz, CD30D): 8 7.22 - 7.14 (m, 3H), 4.55 - 4.52 (dd, J = 7.6, 4.4 Hz, 1H), 3.91- 3.87 (m, 3H), 3.66 - 3.62 (dd, J =13.6, 4.4 Hz, 1H), 3.32 - 3.26 (m, 1H), 3.00 - 2.94 (m, 2H), 1.19 (d, J = 6.8 Hz, 6H), 1.17 (d, J = 6.8 Hz, 6H). MS (ESZ] nalz 414.3 (M+H+).

s H-Asp-Asp(OCHZOPropofol)-OH (220) STEP A: Propofol Chloromethyl Ether (221) Propofol (5.5 mL, 30 mmol) was added to a suspension of sodium hydride (1.26 g, 31.5 mmol) in ethylene glycol dimethyl ether (30 mL) at 0 °C. The suspension was stirred for 15 min. This mixture was then added to a solution of iodochloromethane (11.0 mL, 150 mmol) in ethylene glycol dimethyl ether (30 mL). The resulting mixture was stirred for 14 h at room temperature and diluted with hexane. The organic solution was then washed with water, dried over magnesium sulfate and then concentrated in vaeuo. The crude compound was used without further purification. 1H-NMR (400 MHz, is CDC13): S 7.1 (s, 3H), 5.17 (s, 2H), 3.35 (m, 2H), 1.16 (d, J = 6.8 Hz, 12H) STEP B: Boc-Asp(OCHZOPropofol)-OBn (222) The above intermediate (2.26 g, 10 mmol) was mixed with the cesium salt of Boc-Asp-OBn (7.02 g, 15 mmol) in DMF (20 mL) and stirred for 14 h at room temperature. The resulting solution was diluted with ether and the organic solution was washed with 10%
2o aqueous citric acid solution (2 x 30mL), and brine (2 x 30mL). The organic layer was dried over magnesium sulfate and then concentrated irz vacuo. The crude compound was purified by chromatography on silica gel (Biotage), eluting with a gradient of hexane to 10%
EtOAc/hexane) then concentrated in vacuo (1.78 g, 34% yield). 1H-NMR (400 MHz, CDCl3): 8 7.30 - 7.31 (m, SH), 7.07 - 7.11 (m, 3H) 5,41 - 5.53 (m, 2H), 5.15 (s, 2H), 4.67 2s (m, 1H), 3.2 - 3.26 (m, 2H), 3.07 - 3.08 (d, J = 4.4 Hz, 1H), 2.88 - 2.90 (d, J = 4.4 Hz, 1H), 2.84 (d, J = 4.4 Hz, 1H), 1.42 (s, 9H), 1.2 (d, J = 2.4 Hz, 6H), 1.18 (d, J =
2.4 Hz, 6H). MS
(ESn nala 536.4 (M+Na~) STEP C: H-Asp(OCH20Propofol)-OBn (223) The pure compound (1.78g, 3.32 mmol) from above was dissolved in 3o dichloromethane (5 mL) and treated with trifluoroacetic acid (5 mL). The resulting mixture was stirred at room temperature for 3 h. The solvent was removed in vacuo and the crude residue was carned to the next step without further purification.

STEP D: CBz-Asp(OBn)-Asp(OCHZOPropofol)-OBn (224) To a solution of above compound (0.45 g, 1 mmol) and Cbz-Asp(OBn)-OH (0.39 g, 1.1 mmol) in DMF (4 mL) was added diisopropylethylamine (0.56 mL, 3.3 mmol) followed by O-(7-azabenzotriazol-1-yl)-N,N,N;N'-tetramethyluronium hexafluoro-phosphate(0.42 g, s 1.1 mmol). The resulting mixture was stirred at room temperature for 14 h and then diluted with 40 mL of ethyl acetate. The organic solution was washed with 10% aqueous citric acid solution (2 x 30 mL), saturated aqueous sodium bicarbonate solution (2 x 30 mL) and brine (2 x 30 mL). The organic layer was dried over magnesium sulfate and then concentrated in vacuo. The crude compound (0.62 g) was used without further purification.
to STEP E: H-Asp-Asp(OCHZOPropofol)-OH (220) To a flask containing 50 mg of 10% Pd-C was added a solution of Asp-Asp (Obzl)-OCHaOPropofol (0.62 g, 0.94 mmol) in methanol (5 mL) under nitrogen. The resulting mixture was degassed three times, after which hydrogen was introduced via a balloon apparatus. The suspended mixture was allowed to stir vigorously for 4 h. The reaction is mixture was filtered through a pad of celite and concentrated in vacuo, then purified by preparative LC/MS to afford the title compound (42 mg, 10% yield). 1H-NMR (400 MHz, GD30D): 8 7.09 (s, 3H), 5.53 (m, 2H), 4.67 (m, 1H), 4.10 (m, 1H), 3.41 (dd, J
= 8.0, 16.4 Hz, 1H), 2.86 - 2.95 (m, 3H), 1.19 (d, J = 7.2 Hz, 12H). MS (ESI) m/z 439.8 (M+H+).
2o EXAMPLE 111 H-Trp-Asp(OCHZOPropofol)-OH (225) Following procedures for the preparation of H-Asp-Asp(OCHZOPropofol)-OH, and substituting Boc-Asp-OBn with Boc-Trp(Boc)-OH, provided the title compound (225).
1H-NMR (400 MHz, CD3OD): ~ 7.6 (d, J = 8.0 Hz, 1H), 7.33 (d, J = 8.0 Hz, 1H), 7.21 (s, 2s 1H), 7.02-7.11 (m, 2H), 7.08 (m, 3H), 5.47 (m, 2H), 4.53 (m, 1H), 4.13 (m, 1H), 3.4 (m, 2H), 3.24 (dd, J = 8.0, 16.4 Hz, 1H), 2.89 (m, 3H), 1.18 (d, J= 7.4 Hz, 12H).
MS (ESI) m/z 510.8(M+H+). .

3o H-His-Asp(OCHzOPropofol)-OH (226) Following procedures for preparation of H-Asp-Asp(OCH20Propofol)-OH, and substituting Boc-Asp-OBn with Boc-His(Boc)-OH, provided the title compound (226).
1H-NMR (400 MHz, CD30D): S 8.35 (s, 1H), 8.09 (s, 2H), 7.15 (s, 1H), 7.09 (s, 3H), 5.51-5.56 (m, 2H), 4.66 - 4.68 (m, 1H), 4.10 - 4.13 (m, 1H), 3.28 - 3.24 (m, 2H), 2.99 - 3.05 (dd, J = 4.8, 13.6 Hz, 2H), 2.89 (dd, J = 8.0, 16.OHz, 2H), 1.18 (d, J = 7.2 Hz, 12H). MS (ESI) m/z 461.8 (M+H+).
s EXAMPLE 113 H-Asn-Asp(OCHZOPropofol)-OH (227) Following procedures for preparation of H-Asp-Asp(OCH20Propofol)-OH, and substituting Boc-Asp-OBn with Boc-Asn-OH, provided the title compound (227).

(400 MHz, CD30D): ~ 7.09 (s, 3H), 5.51 (s, 2H), 4.56 - 4.58 (m, 1H), 4.14 -4.18 (m, 1H), l0 3.28-3.24 (m, 2H), 2.93 - 2.98(m, 2H), 2.85 - 2.89 (dd, J = 4.8, 13.6 Hz, 1H), 2.68 - 2.75 (dd, J = 8.0,16.0 Hz, 2H), 1.18 (d, J = 7.2 Hz, 12H). MS (ESI) m/z 438.8 (M+H+).

H-Gln-Asp(OCH20Propofol)-OH (228) is Following procedures for preparation of H-Asp-Asp(OCHZOPropofol)-OH, and substituting Boc-Asp-OBn with Boc-Gln-OH, provided the title compound (228).

(400 MHz, CD30D): b 7.09 (s, 3H), 5.51 (s, 2H), 4.61 (m, 1H), 3.89 (m, 1H), 3.46 (m, 2H), 2.84 - 2.98 (m, 2H), 2.46 (m, 2H), 2.11 (m, 2H), 1.18 (d, J = 7.2 Hz, 12H). MS
(ESI) f~alz 452.8(M+H+).
zo H-Thr-Asp(OCH20Propofol)-OH (229) Following procedures for preparation of H-Asp-Asp(OCHzOPropofol)-OH, and substituting Boc-Asp-OBn with Boc-Thr(OtBu)-OH, provided the title compound (229).
zs IH-NMR (400 MHz, CD3OD): b 7.09 (s, 3H), 5.51 (s, 2H), 4.53 (m, 1H), 4.07 (m, 1H), 3.63 (d, J = 5.6 Hz, 1H), 3.46 (m, 2H), 2.84 - 2.98(m, 2H), 1.23(d, J = 6.8 Hz, 3H), 1.18 (d, J =
7.2 Hz, 12H). MS (ESI) m/z 425.3 (M+H+).

30 H-Ser-Asp(OCH20Propofol)-OH (230) Following procedures for preparation of H-Asp-Asp(OCH20Propofol)-OH, and substituting Boc-Asp-OBn with Boc-Ser(OtBu)-OH, provided the title compound (230).

1H-NMR (400 MHz, CD30D): S 7.09 (s, 3H), 5.51 (s, 2H), 4.53 (m, 1H), 4.07 (m, 1H), 3.63 (d, J = 5.6 Hz, 1H), 3.46 (m, 2H), 2.84 - 2.98 (m, 2H), 1.18 (d, J = 7.2 Hz, 12H). MS (ESI) m/z 411.8 (M+H+).

s H-Gly-Asp(OCH20Propofol)-OH (231) Following procedures for preparation of H-Asp-Asp(OCH20Propofol)-OH, and substituting Boc-Asp-OBn with Boc-Gly-OH, provided the title compound (231).

(400 MHz, CD30D): S 7.09 (s, 3H), 5.51 (m, 2H), 4.61 (m, 1H), 3.55 - 3.69 (m, 2H), 2.84-l0 2.98 (m, 2H), 1.18 (d, J = 7.2 Hz, 12H). MS (ESI) nalz 381.8 (M+H+).

H-Glu-Asp(OCH20Propofol)-OH (232) Following procedures for preparation of H-Asp-Asp(OCH20Propofol)-OH, and is substituting Boc-Asp-OBn with Boc-Glu(OtBu)-OH, provided the title compound (232).
1H-NMR (400 MHz, CD30D): ~ 7.09 (s, 3H), 5.51 (m, 2H), 4.61 (m, 1H), 3.91 (m, 1H), 3.34 (m, 2H), 2.92 - 2.97 (m, 2H), 2.51 - 2.54 (m, 2H), 2.08 - 2.13 (m, 2H), 1.18 (d, J = 7.2 Hz, 12H). MS (ESI) m/z 453.2 (M+H+).
2o EXAMPLE 119 H-Tyr-Asp(OCHZOPropofol)-OH (233) Following procedures for preparation of H-Asp-Asp(OCHaOPropofol)-OH, and substituting Boc-Asp-OBn with Boc-Tyr-OH, provided the title compound (233).

(400 MHz, CD3OD): S 7.09 - 7.11(m, SH), 6.73 - 6.75 (d, J = 8.0 Hz, 2H), 5.51 (m, 2H), 2s 4.61 (m, 1H), 4.01 (m, 1H), 3.34 (m, 2H), 2.92 - 2.97 (m, 2H) 1.18 (d, J =
7.2 Hz, 12H).
MS (ESI) m/z 487.3 (M+H+) H-Ala-Asp(OCH20Propofol)-OH (234) so Following procedures for preparation of H-Asp-Asp(OCH2OPropofol)-OH, and substituting Boc-Asp-OBn with Boc-Ala-OH, provided the title compound (234).

(400 MHz, CD30D): & 7.09 (s, 3H), 5.52 (s, 2H), 4.55 - 4.52 (dd, J = 7.2, 4.8 Hz, 1H), 3.91 (q, J = 6.8 Hz, 1H), 3.34 - 3.30 (m, 2H), 2.98 - 2.94 (dd, J =16.4, 4.8 Hz, 1H), 2.89 - 2.83 (dd, J = 16.4, 7.6 Hz, 1H), 1.50 (d, J = 7.2 Hz, 3H), 1.21 (d, J = 7.2 Hz, 12H). MS (ESI) m/z 395.37 (M+H+).

s H-Asp(OCH20Prouofol)-Lys-OH (235) STEP A: Boc-Asp(OCH20Propofol)-OH (236) To a flask containing 50 mg of 10% Pd-C was added a solution of Boc-Asp(OCH20Propofol)-OBn (0.77 g, 1.5 mmol) in methanol under nitrogen. The resulting mixture was degassed three times, after which hydrogen was introduced via a balloon apparatus. The suspended mixture was allowed to stir vigorously for 4 h at room temperature. The reaction mixture was filtered through a pad of celite and concentrated ih vacuo. The crude compound (236) (0.64 g) was used without further purification.
STEP B: Boc-Asp(OCH20Prouofol)-LysBoc)-OtBu (237) is To a solution of (236) (0.64 g, 1.5 mmol) and H-Lys(Boc)-OtBu (0.557 g, 1.65 mmol) in DMF was added diisopropylethylamine (0.51 mL, 3.0 mmol) followed by O-(7-azabenzotriazol-1-yl)-N,N,N;N'-tetramethyluronium hexafluorophosphate(0.63 g, 1.65 mmol). The resulting mixture was stirred at room temperature for 14 h and then diluted with ethyl acetate (40 mL). The organic solution was washed with 10% aqueous citric acid 2o solution (2 x 30 mL), saturated aqueous sodium bicarbonate solution (2 x 30 mL) and brine (2 x 30 mL). The organic layer was dried over magnesium sulfate and then concentrated ih vacuo. The crude compound (237) was used without further purification.
STEP C: H-Asp(OCHZOPropofol)-Lys-OH (235) Compound (237) (0.65 g, 0.92 mmol) from above was dissolved in dichloromethane 2s (1.5 mL) and treated with trifluoroacetic acid (1.5 mL). The resulting mixture was stirred at room temperature for 3 h. The solvent was removed in vaeuo and the crude residue was purified by preparative LC/MS to afford the title compound (235). 1H-NMR (400 MHz, CD30D): S 7.09 (s, 3H), 5.51 (s, 2H), 4.23 (m, 1H), 4.07 (m, 1H), 2.79 - 3.02 (m, 4H), 1.81 (m, 2H), 1.62 - 1.78 (m, 4H), 1.45 (m, 2H), 1.18 (d, J = 7.2 Hz, 12H). MS
(ESI) f~z/z 30 452.8(M+H+) H-Asp(OCH20Prouofol)-Asp-OH (238) Following procedures for preparation of H-Asp(OCH20Propofol)-Lys, and s substituting H-Lys(Boc)-OtBu with H-Asp(OtBu)-OtBu, provided the title compound (238).
1H-NMR (400 MHz, CD30D): 8 7.11 (s, 3H), 5.62 (s, 2H), 4.59 - 4.56 (m, 1H), 4.22 - 4.19 (dd, J = 9.2, 4.0 Hz, 1H), 3.18 - 3.13 (dd, J = 17.6, 4.0 Hz, 1H), 2.93 - 2.72 (m, SH), 1.21 (d, J = 6.4 Hz, 12H). MS (ESI) rnlz 439.27 (M+H+).
to EXAMPLE 123 H-Asp(OCHZOPropofol)-Art-OH (239) Following procedures for preparation of H-Asp(OCH20Propofol)-Lys, and substituting H-Lys(Boc)-OtBu with H-Arg(Pmc)-OtBu, provided the title compound (239).
(400 MHz, CD3OD): 8 7.11 (s, 3H), 5.62 - 5.59 (ABq, J = 7.2, 5.6 Hz, 2H), 4.25 (t, J = 6.0 Is Hz, 1H), 4.14 (m, 1H), 3.34 - 3.31 (m, 2H), 3.18 (t, J = 6.8 Hz, 2H), 3.14 -3.09 (dd, J =
17.6, 4.0 Hz, 1H), 2.91- 2.84 (dd, J =17.2, 8.4 Hz, 1H), 1.89 -1.86 (m, 1H), 1.77 -1.63 (m, 3H), 1.21 (d, J = 6.4 Hz, 12H). MS (ESI) f~alz 480.28 (M+H+).

2o H-Asp(OCH20PronofoD-Ser-OH (240) Following procedures for preparation of H-Asp(OCHZOPropofol)-Lys, and substituting H-Lys(Boc)-OtBu with H-Ser(OtBu)-OtBu, provided the title compound (240).
1H-NMR (400 MHz, CD3OD): 8 7.11 (s, 3H), 5.62 (s, 2H), 4.39 (t, J = 4.8 Hz, 1H), 4.27 -4.24 (dd, J = 9.2, 4.4 Hz, 1H), 3.86 (d, J = 4.8 Hz, 2H), 3.35 - 3.31 (m, 2H), 3.21- 3.16 (dd, 2s J = 17.6, 4.4 Hz, 1H), 2.93 - 2.86 (dd, J = 18.0, 9.2 Hz, 1H), 1.21 (d, J =
6.4 Hz, 12H). MS
(ESI) n~/z 411.31 (M+H+).

H-Val-OCH20Propofol (241) STEP A: Boc-Val-O-Cs+ (242) s To a solution of Boc-Val-OH (1.0 g, 4.6 mmol) in a 1:4 mixture of acetonitrile : H20 (5 mL) was added cesium bicarbonate (0.9 g, 4.6 mmol). The resulting solution was stirred for 10 min, and then the solvent was frozen and lyophilized to give (242) as a white powder.
STEP B: H-Val-OCHZOProuofol (241) To a solution of propofol chloromethyl ether (221) (0.36 g, 1.59 mmol) in DMF
(4 to mL) was added (242) (0.5 g, 1.42 mmol). The resulting reaction mixture was stirred at room temperature for overnight, then diluted with ethyl acetate (30 mL) and 10% citric acid aqueous solution (20 mL). The layers were separated and the organic layer was washed with brine (2 x 20 mL), dried over MgS04 and concentrated in vacuo. The crude residue was dissolved in dichloromethane (4 mL) and treated with trifluoroacetic acid (1 mL). The ~s reaction was stirred for 3 h at room temperature. The solvent was removed in uacuo, and the crude product purified by preparative LC/MS to afford the title compound (241) (118 mg, 27% yield). 1H-NMR (400 MHz, CD30D): 8 7.12 - 7.08 (m, 3H), 5.63 - 5.58 (Abq, J
= 16, 5.2 Hz, 2H), 3.58 (d, J = 3.6 Hz, 1H), 3.32 - 3.25 (m, 2H), 2.24 - 2.19 (m, 1H), 1.21 (d, J = 6.8 Hz, 12H), 1.05 (d, J = 6.8 Hz, 3H), 0.96 (d, J = 6.8 Hz, 3H). MS
(ESA nZ/z 20 308.43 (M+H+) H-Aib-OCHZOPropofol (243) Following procedures for preparation of H-Val-OCH20Propofol, and substituting 2s Boc-Val-OH with Boc-Aib-OH, provided the title compound (243). 1H-NMR (400 MHz, CD30D): b 7.12 - 7.08 (m, 3H), 5.60 (s, 2H), 3.32 - 3.25 (m, 2H), 1.49 (s, 6H), 1.21 (d, J =
6.8 Hz, 12H). MS (ESl' ynlz 294.39 (M+H+).

H-Asu(OCH20Propofol)-OH (244) Following procedures for preparation of H-Val-OCH20Propofol, and substituting Boc-Val-OH with Boc-Asp-OtBu, provided the title compound (244). IH-NMR (400 MHz, s CD30D): 8 7.11 (s, 3H), 5.63 - 5.57 (Abq, J = 21.6, 5.6 Hz, 2H), 3.95 - 3.92 (dd, J = 8.4, 3.6 Hz, 1H), 3.34 - 3.29 (m, 2H), 3.14 - 3.08 (dd, J =18.4, 4.0 Hz, 1H), 2.93 -2.86 (dd, J =
18.4, 8.8 Hz, 1H), 1.21 (d, J = 6.8 Hz, 12H). MS (ESI) mlz 324.34 (M+H+).

to H-Asp-OCH20Propofol (245) Following procedures for preparation of H-Val-OCH20Propofol, and substituting Boc-Val-OH with Boc-Asp(OtBu)-OH, provided the title compound (245). 1H-NMR
(400 MHz, CD30D): ~ 7.11 (s, 3H), 5.63 - 5.68 (Abq, J = 89.6, 5.6 Hz, 2H), 4.17 (t, J = 5.2 Hz, 1H), 3.31 (m, 2H), 2.82 (d, J = 5.6 Hz, 2H), 1.21 (d, J = 7.2 Hz, 12H). MS
(ESI) m/z 324.34 1 s (M+H+) H-Dap((3-NHC(O)OProuofol)-Ala-OH (246) 2o STEP A: Cbz-DapBoc)-Ala-OBn (247) Cbz-Dap(Boc)-OH (0.41 g, 1.2 rnmol) was treated with a mixture of 1-(3-(dimethylamino)propyl)-3-ethylcarbodiimide methiodide (0.374 g, 1.26 mmol) and N
hydxoxybenzotriazole (0.17 g, 1.26 mmol) in N-methylmorpholine (0.28 mL, 2.1 mrnol) in dichloromethane. H-Ala-OBn (0.26 g, 1.2 mmol) was added to the above solution and the 2s resulting mixture was stirred for 14 h at room temperature, then diluted with ethyl acetate (40 mL). The organic solution was washed with 10% aqueous citric acid solution (2 x 30 mL), saturated aqueous sodium bicarbonate solution (2 x 30 mL) and brine (2 x 30 mL).
The organic layer was dried over magnesium sulfate and then concentrated in vacuo. The crude compound (247) (0.51 g) was used without further purification.
3o STEP B: Cbz-Dap-Ala-OBn (248) Compound (247) (0.51 g, 1.02 mmol) from above was dissolved in dichloromethane (1 mL) and treated with trifluoroacetic acid (1 mL). The resulting mixture was stirred at room temperature for 3 h. The solvent was removed ih vacuo and the crude residue (248) (0.49 g ) was used in the next step without further purification.

STEP C: CBz-Dap((3-NHC(O)OPropofol)-Ala-OBn (249) To an ice cold solution of chloroformate (163) (0.384 g, 1.6 mmol) in dichloromethane (4 mL) was added triethylamine (0.075 mL, 1.3 mmol) followed by s compound (248) (0.4 g, 1 mmol). The resulting mixture was allowed to warm to room temperature and stirred for 12 h. The mixture was diluted with ethyl acetate (30 mL) and washed with 10% aqueous citric acid solution (2 x 30 mL), dried over MgS04, filtered and concentrated ira vacuo. The crude product (249) (0.66g) was used in the next step without further purification.
to STEP D: H-Dap((3-NHC(O)OPropofol)-Ala-OH (246) To a flask containing 50 mg of 10% Pd-C was added a solution of compound (249) (0.66 g, 1 mmol) in methanol (5 mL) under nitrogen. The resulting mixture was degassed three times, after which hydrogen was introduced via a balloon apparatus. The suspended mixture was allowed to stir vigorously for 4 h. The reaction mixture was filtered through a Is pad of celite and concentrated in vacuo and the crude residue was purified by preparative LC/MS to afford the title compound (246) (48 mg, 13% yield). 1H-NMR (400 MHz, CD30D): b 7.11-7.17 (m, 3H), 4.47 (m, 1H), 4.23 (q, 1H), 3.31 (m, 2H), 3.01 (m, 2H), 1.38 (d, J = 7.2 Hz, 3H), 1.17 (d, J = 7.4 Hz, 12H). MS (ESI) m/z 380.3 (M+H+).
2o EXAMPLE 130 H-Lys-Glu(OPropofol)-OH (250) Following procedures for preparation of compound (107) and substituting CBz-Lys(CBz)-OH for CBz-Ala-OH and compound (105) for compound (102) provided the title compound (250). 1H-NMR (400 MHz, CD30D): b 7.17 (m, 3H), 4.31 (dd, J =
8.4, 5.2 2s Hz, 1H), 3.90 (dd, J = 7.6, 6.0 Hz, 1H), 2.89 (m, 4H), 2.77 (t, J = 8.4 Hz, 2H), 2.34 (m, 1H), 2.10 (m, 1H), 1.89 (m, 2H), 1.76-1.50 (m, 4H), 1.18 (d, J = 6.8 Hz, 12H). MS
(ESI) nz/z 437.43 (M+H+).

3o Irr Vitro Compound Transport Assays:
Analysis of Electro~enic Transport in PEPTl-Expressing Xerroprrs Oocytes Transport-induced currents were also measured in Xehopus oocytes transfected with rat and human PEPT1 as described in PCT Application W001/20331. Briefly:

RNA preparation: Rat and human PEPTl transporter cDNAs were subcloned into a modified pGEM plasmid that contains 5' and 3' untranslated sequences from the Xenopus [3-actin gene. These sequences increase RNA stability and protein expression.
Plasmid cDNA was linearized and used as template for in vitro transcription (Epicentre s Technologies transcription kit, 4:1 methylated:non-methylated GTP).
Xenopus oocyte isolation. Xenopus laevis frogs were anesthetized by immersion in Tricaine (1.5 g/mL in deionized water) for 15 min. Oocytes were removed and digested in frog ringer solution (90 mM NaCl, 2 mM KCI, 1 mM MgCl2, 10 rnM NaHEPES, pH
7.45, no CaClz) with 1 mg/mL collagenase (Worthington Type 3) for 80-100 min with shaking.
to The oocytes were washed 6 times, and the buffer changed to frog ringer solution containing CaCl2 (1.8 mM). Remaining follicle cells were removed if necessary. Cells were incubated at 16° C, and each oocyte inj ected with 10-20 p.g RNA in 45 pL
solution.
Electrophysiology measurements. Transport currents were measured 2-14 days after injection, using a standard two-electrode electrophysiology set-up (Geneclamp ~s amplifier, Digidata 1320/PCLAMP software and ADInstruments hardware and software were used for signal acquisition). Electrodes (2-4 mS2) were microfabricated using a Sutter Instrument puller and filled with 3M KCI. The bath was directly grounded (transporter currents were less than 0.3 ~.A). Bath flow was controlled by an automated perfusion system (ALA Scientific Instruments, solenoid valves).
2o For transporter pharmacology, oocytes were clamped at -60 to -90 mV, and continuous current measurements acquired using PowerLab Software and an ADInstruments digitizer. Current signals were lowpass filtered at 20 Hz and acquired at 4-8 Hz. All bath and drug-containing solutions were frog ringers solution containing CaCl2.
Drugs were applied for 10-30 seconds until the induced current reached a new steady-state 2s level, followed by a control solution until baseline currents returned to levels that preceded drug application. The difference current (baseline subtracted from peak current during drug application) reflected the net movement of charge resulting from electrogenic transport and was directly proportional to transport rate. Recordings were made from a single oocyte for up to 60 min, enabling 30-40 separate compounds to be tested per oocyte.
3o Compound-induced currents were saturable and gave half maximal values at substrate concentrations comparable to radiolabel competition experiments. To compare results between oocytes expressing different levels of transport activity, a saturating concentration of glycyl-sarcosine (1 mM) was used as a common reference to normalize results from test compounds. TJsing tlus normalization procedure ImaX (i.e. maximal induced current) for different compounds tested on different oocytes could be compared.
Each of the compounds (107), (115), (116), (119) - (122), (124), (136), (138) -(140), (143), (145) - (150), (161), (208), (210), (213), (220), (227) - (229), (241), (243) and (250) elicited PEPT-specific currents significantly above background (at least 2% of ImaX for Gly-Sar) when tested at 3 mM on oocytes expressing PEPT1, confirming that these compounds serve as substrates for this transporter.

Standard Methods for Determination of Enzymatic Cleavage of Prodru~s iiZ
l~itro The stability of propofol prodrugs were evaluated in one or more i~c vitro systems using a variety of tissue preparations following methods known in the art.
Tissues were obtained from commercial sources (e.g., Pel-Freez Biologicals, Rogers, AR, or GenTest Corporation, Woburn, MA). Experimental conditions used for the ih vitro studies are is described in Table 1 below. Each preparation was incubated with test compound at 37°C
for one hour. Aliquots (50 ~,L) were removed at 0, 30, and 60 min and quenched with 0.1%
trifluoroacetic acid in acetonitrile. Samples were then centrifuged and analyzed by LC/MS/MS (see Examples 59 and 60 below for method details). Stability of drug conjugates towards specific enzymes (e.g., peptidases, etc.) were also assessed ih vitro by 2o incubation with the purified enzyme:
An2iraopeptidase Stability: Aminopeptidase 1 (Sigma catalog # A-9934) was diluted in deionised water to a concentration of 856 units/mL. Stability studies were conducted by incubating conjugate (5 ~,M) with 0.856 units/mL asninopeptidase 1 in 50 mM
Tris-HCl buffer at pH 8.0 and 37°C. Concentrations of intact conjugate and released drug were 2s determined at zero time and 60 minutes using LC/MS/MS.
Pafzcreati~r Stability. Stability studies were conducted by incubating conjugate (5 ~M) with 1 % (w/v) pancreatin (Sigma, P-1625, from porcine pancreas) in 0.025 M Tris buffer containing 0.5 M NaCI (pH 7.5) at 37 °C for 60 min. The reaction was stopped by addition of 2 volumes of methanol. After centrifugation at 14;000 rpm for 10 min, the 3o supernatant was removed and analyzed by LC/MS/MS.
Caco-2 Homogenate S9 Stability: Caco-2 cells were grown for 21 days prior to harvesting. Culture medium was removed and cell monolayers were rinsed and scraped off into ice-cold 10 mM sodium phosphate/0.15 M potassium chloride, pH 7.4. Cells were lysed by sonication at 4°C using a probe sonicator. Lysed cells were then transferred into 1.5 mL centrifuge vials and centrifuged at 9000 g for 20 min at 4°C.
The resulting supernatant (Caco-2 cell homogenate S9 fraction) was aliquoted into 0.5 mL
vials and stored at -80°C until used.
For stability studies, prodrug (5 ~.M) was incubated in Caco-2 homogenate S9 fraction (0.5 mg protein per mL) for 60 min at 37°C. Concentrations of intact prodrug and released propofol were determined at zero time and 60 minutes using LC/MS/MS.
Preferred conjugates demonstrate at least 1% cleavage to produce the free drug or an active metabolite thereof within a 60 minute period, as summarized in Table 2.
to Table 1. Standard Conditions for Conjugate Ih YitYO Metabolism Studies Preparation Substrate Cofactors Concentration Rat Plasma 2.0 ~,M None Human Plasma 2.0 ~M None Rat Liver S9 2.0 ~,M NADPH

(0.5 mg/mL) Human Liver 2.0 ~,M NADPH

(0.5 mg/mL) Human Intestine2.0 p.M NADPH

(0.5 mg/mL) Carboxypeptidase2.0 pM None A

(10 units/mL) Caco-2 5.0 p.M None Homogenate Pancreatin 5.0 p.M None Aminopeptidase5.0 p,M ~ None *NADPH generating system, e.g., 1.3 mM NADP+, 3.3 mM glucose-6-phosphate, 0.4 U/mL glucose-6-15 phosphate dehydrogenase, 3.3 mM magnesium chloride and 0.95 mg/mL potassium phosphate, pH 7.4.

Table 2. % of Propofol Released from Propofol Prodrugs after 60 min. in Various Tissue Preparations (107) (121) (122) (124) (138) (152) (161) Rat Plasma 3 7 2 65 50 37 30 Human Plasma 1 3 0 2 44 0 2 Rat Liver S9 6 0 9 0 0 11 8 (0.5 mg/mL) Human Liver 5 0 6 0 0 8 14 (0.5 mg/mL) Caco-2 S9 4 0 0 0 3 6 20 Pancreatin 7 0 10 4 9 1 8 (192) (208) (220) (250) Rat Plasma 15 ND ND 79 Human Plasma 15 2 1 17 Rat Liver S9 60 ND ND 36 (0.5 mg/mL) Human Liver 60 3 0 34 (0.5 mg/mL) Caco-2 S9 41 21 49 19 Pancreatin 0 25 6 0 ND- Not done Uptake of Propofol Following Oral Administration to Rats to Step A: Administration Protocol Propofol was administered as an intravenous bolus injection or by oral gavage to groups of four to six adult male Sprague-Dawley rats (weight approx 250 g) as solutions in PEG400, at doses of 10 mg per kg body weight (LV.) or 25 mg per kg body weight (oral).
Is Animals were fasted overnight before the study and for 4 hours post-dosing.
Blood samples (1.0 mL) were obtained via a jugular vein cannula at intervals over 24 hours after oral dosing. Blood was quenched irmnediately using acetonitrile with 1% formic acid and then was frozen at -80°C until analyzed.

Step B: LC/MS/MS Analysis Concentrations of propofol in plasma were determined using an API 4000 LClMS/MS instrument equipped with an Agilent 1100 binary pump and an Agilent autosampler. The column was a Phenomenex Hydro-RP 4.6*50 mm column operating at s room temperature. The mobile phases were 2 mM aqueous ammonium acetate (A) and 95%
acetonitrile with 5 mM ammonium acetate (B). The gradient condition was: 5% B
for 1 min, increasing to 90% B in 2.5 min and maintained for 2 min. 20 ~L of sample was injected. A
Turbo-IonSpray source was used, and propofol was detected in negative ion mode in Q1 at m/z = 177. The peaks were integrated using Analyst 1.2 quantitation software.
The oral bioavailability (F) of propofol, determined by comparison of the area under the propofol concentration versus time curve (AUC) following oral administration with the AUC measured following intravenous propofol administration, was found to be very low as expected (F = 0.23%).
Is E~~AMPLE 134 Uptake of Propofol Following Oral Administration of Prodru~s to Rats Step A: Administration Protocol Test compounds were administered by oral gavage or as an intravenous bolus 2o inj ection to groups of four to six adult male Sprague-Dawley rats (weight approx 250 g) as solutions in PEG400 at a dose of 25 mg-equivalents of propofol per kg body weight.
Animals were fasted overnight before the study and for 4 hours post-dosing.
Blood samples (1.0 mL) were obtained via a jugular vein cannula at intervals over 24 hours after oral dosing. Blood was quenched immediately using acetonitrile with 1 % formic acid and then 2s was frozen at -80°C until analyzed.
Step B: LC/MS/MS Analysis Concentrations of propofol in whole blood were determined using an API 4000 LC/MSIMS instrument as described above. For determination of the prodrug 3o concentrations in whole blood, the mobile phases were 0.1 % formic acid (A) and acetonitrile with 0.1% formic acid (B). The gradient condition was: 5% B for 1 min, increasing to 90% B in 2.5 min and maintained for 2 min. 10 ~,L of sample was injected. A
TurboIonSpray source was used and the prodrugs were detected in positive ion mode, using MRM transitions of 365 / 294 for (107), 457 / 136 for (122), 422 / 136 for (124), 422/136 for (124), and 436/84 for (250). The peaks were integrated using Analyst 1.2 quantitation software.
Oral bioavailability (F) of the prodrugs as propofol were determined by comparison of the areas under the propofol concentration versus time curves (AUC) following oral administration of the prodrugs with the AUC measured following intravenous administration of propofol itself on a dose-normalized basis. Each of the compounds (107), (122), (124) and (250) showed substantial oral bioavailabilities as propofol (F > 50%) illustrating that actively transported prodrugs can afford dramatic enhancements (> 200-fold) in oral bioavailability of propofol.
to E~AAMPLE 135 Uptake of Propofol Following Oral Administration of Prodru~s to Monkeys Step A: Administration Protocol is Test compounds were administered by oral gavage or as an intravenous bolus injection to groups of two to four adult male Cynomologous (Macaca fascicularis) monkeys (weight approx 5 kg) as solutions in water or PEG400 at a dose of 25 mg-equivalents of propofol per kg body weight. Animals were fasted overnight before the study and for 4 hours post-dosing. Blood samples (1.0 mL) were obtained via the femoral vein at intervals 20 over 24 hours after oral dosing. Blood was quenched immediately using acetonitrile with 1 % formic acid and then was frozen at -80°C until analyzed. Test compounds are administered in the monkeys with a minimum of 72 hour wash out period between dosing sessions.
Step B: LC/MS/MS Analysis 2s Concentrations of propofol in whole blood were determined using an API 4000 LC/MS/MS instrument as described above and the prodrugs were detected in positive ion mode, using MRM transitions of 365 / 294 for (107), 457 / 136 for (122), 422 /
136 for (124), 422.19/136.08 for (124), 423/405 for (140), 436/84 for (146), 381/159 for (161), 399/136 for (192), 436/207 for (201), 397/175 for (208), 411/189 for (213), 439/261 for 30 (220), and 436/84 for (250). The peaks were integrated using Analyst 1.2 quantitation software.
Oral bioavailability (F) of the prodrugs as propofol in monkeys were determined by comparison of the areas under the propofol concentration versus time curves (AUC) following oral administration of the prodrugs with the AUC measured following intravenous administration of propofol itself on a dose-normalized basis. The compounds (174), (213) and (250) had oral bioavailabilities as propofol > 10%, while (140), (146) and (208) had oral bioavailabilities as propofol > 40%, illustrating that actively transported prodrugs can afford significant enhancements in oral bioavailability of propofol.
Finally, it should be noted that there are alternative ways of implementing the present invention. Accordingly, the present embodiments are to be considered as illustrative and not restrictive, and the invention is not to be limited to the details given herein, but may be modified within the scope and equivalents of the claims) issuing herefrom. All publications and patents cited herein are incorporated by reference.

Claims (48)

1. A compound of Formula (I):
or a pharmaceutically acceptable salt, hydrate, solvate or N-oxide thereof, wherein:
X is selected from the group consisting of a bond, CH2, NR11, O and S;
m is 1 or 2;
n is 0 or 1;
R1 is selected from the group consisting of hydrogen, [R5NH(CHR4)p C(O)]-, R6-, R6C(O)- and R6OC(O)-;
R2 is -OR7 or -[NR8(CHR9)q C(O)OR7];
p and q are independently 1 or 2;
R3 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkoxycarbonyl, aryl, substituted aryl, arylalkyl, carbamoyl, substituted carbamoyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
each R4 is independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, acyl, substituted acyl, alkoxycarbonyl, substituted alkoxycarbonyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, carbamoyl, substituted carbamoyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl, substituted heteroalkyl, heteroaryl, substituted heteroaryl, heteroarylalkyl and substituted heteroarylalkyl, or optionally, when R4 and R5 are attached to adjacent atoms then R4 and R5 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring;

R5 is selected from the group consisting of hydrogen, R6-, R6C(O)- and R6OC(O)-;
R6 is selected from the group consisting of alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
R7 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
R8 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
each R9 is independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, acyl, substituted acyl, alkoxycarbonyl, substituted alkoxycarbonyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, carbamoyl, substituted carbamoyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl, substituted heteroalkyl, heteroaryl, substituted heteroaryl, heteroarylalkyl and substituted heteroarylalkyl, or optionally, when R8 and R9 are attached to adjacent atoms then R8 and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring;
R11 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
with the provisos that:
when R1 is [R5NH(CHR4)p C(O)]- then R2 is -OR7; and when R2 is -[NR8(CHR9)q C(O)OR7] then R1 is not [R5NH(CHR4)p C(O)]-.
2. The compound of Claim 1, wherein n is 0.
3. The compound of Claim 1 having structural Formula (III):
wherein R4 is selected from the group consisting of hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl and substituted heteroarylalkanyl.
4. The compound of Claim 3, wherein R4 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH2OH, -CH(OH)CH3, -CH2CO2H, -CH2CH2CO2H, -CH2CONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
5. The compound of Claim 1 having structural Formula (IV):
wherein R4 is selected from the group consisting of hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl and substituted heteroarylalkanyl.
6. The compound of Claim 5, wherein R4 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH2OH, -CH(OH)CH3, -CH2CO2H, -CH2CH2CO2H, -CH2CONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
7. The compound of Claim 1 having structural Formula (V):
wherein R4 is selected from the group consisting of hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl and substituted heteroarylalkanyl.
8. The compound of Claim 7, wherein R4 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH2OH, -CH(OH)CH3, -CH2CO2H, -CH2CH2CO2H, -CH2CONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
9. The compound of Claim 1 having structural Formula (VI):

wherein R4 is selected from the group consisting of hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl and substituted heteroarylalkanyl.
10. The compound of Claim 9, wherein R4 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH20H, -CH(0H)CH3, -CH2C02H, -CH2CH2C02H, -CH2C0NH2, -CH2CH2C0NH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
11. The compound of Claim 1 having structural Formula (VII):

wherein R3 is hydrogen or methyl; and R4 is selected from the group consisting of hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl and substituted heteroarylalkanyl.
12. The compound of Claim 11, wherein R4 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH2OH, -CH(0H)CH3, -CH2C02H, -CH2CH2C02H, -CH2C0NH2, -CH2CH2C0NH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
13. A compound of Formula (VIII):

wherein R3 is hydrogen or methyl; and R4 is selected from the group consisting of hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl and substituted heteroarylalkanyl.
14. The compound of Claim 13, wherein R4 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH20H, -CH(0H)CH3, -CH2C02H, -CH2CH2C02H, -CH2CONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
15. The compound of Claim 1 having structural Formula (IX):

wherein R8 is hydrogen or methyl; and R9 is selected from the group consisting of hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl and substituted heteroarylalkanyl, or optionally R8 and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
16. The compound of Claim 15, wherein R8 is hydrogen and R9 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH20H, -CH(0H)CH3, -CH2C02H, -CH2CH2C02H, -CH2C0NH2, -CH2CH2C0NH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
17. The compound of Claim 15, wherein R8 and R9 together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
18. The compound of Claim 1 having structural Formula (X):

wherein R8 is hydrogen or methyl; and R9 is selected from the group consisting of hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl and substituted heteroarylalkanyl, or optionally R8 and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
19. The compound of Claim 18, wherein R8 is hydrogen and R9 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH2OH, -CH(OH)CH3, -CH2CO2H, -CH2CH2CO2H, -CH2CONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
20. The compound of Claim 19, wherein R8 and R9 together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
21. The compound of Claim 1 having structural Formula (XI):

wherein R3 is hydrogen or methyl;
R8 is hydrogen or methyl; and R9 is selected from the group consisting of hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl and substituted heteroarylalkanyl, or optionally R8 and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
22. The compound of Claim 21, wherein R3 is hydrogen.
23. The compound of Claim 22, wherein R8 is hydrogen and R9 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH20H, -CH(0H)CH3, -CH2C02H, -CH2CH2C02H, -CH2C0NH2, -CH2CH2C0NH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
24. The compound of Claim 22, wherein R8 and R9 together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
25. The compound of Claim 1 having structural Formula (XII):

26. The compound of Claim 1 having structural Formula (XIII):

27. The compound of Claim 1 having structural Formula (XIV):

wherein R3 is hydrogen or methyl.
28. The compound of Claim 1 having Formula (XV):

wherein R3 is hydrogen or methyl.
29. A compound of Formula (II):

or a pharmaceutically acceptable salt, hydrate, solvate or N-oxide thereof, wherein:
n is 0 or l;
R10 is hydrogen or [R5NH(CHR4)pC(O)]-;
p and q are independently 1 or 2;
R3 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkoxycarbonyl, aryl, substituted aryl, arylalkyl, carbamoyl, substituted carbamoyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
each R4 is independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, acyl, substituted aryl, alkoxycarbonyl, substituted alkoxycarbonyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, carbamoyl, substituted carbamoyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl, substituted heteroalkyl, heteroaryl, substituted heteroaryl, heteroarylalkyl and substituted heteroarylalkyl, or optionally, when R4 and R5 are attached to adjacent atoms then R4 and R5 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring;
R5 is selected from the group consisting of hydrogen, R6-, R6C(0)- and R60C(0)-;
R6 is selected from the group consisting of alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
R8 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, heteroaryl, substituted heteroaryl and heteroarylalkyl;
each R9 is independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, acyl, substituted aryl, alkoxycarbonyl, substituted alkoxycarbonyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, carbamoyl, substituted carbamoyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl, substituted heteroalkyl, heteroaryl, substituted heteroaryl, heteroarylalkyl and substituted heteroarylalkyl, or optionally, when R8 and R9 are attached to adjacent atoms then R8 and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring;
with the proviso that:
when R10 is hydrogen then n is 1.
30. The compound of Claim 29, wherein n is 0.
31. The compound of Claim 29 having structural Formula (XVI):

wherein R4 is selected from the group consisting of hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl and substituted heteroarylalkanyl;
R8 is hydrogen or methyl; and R9 is selected from the group consisting of hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl and substituted heteroarylalkanyl, or optionally, R8 and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
32. The compound of Claim 31, wherein R8 is hydrogen and R9 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH2OH, -CH(OH)CH3, -CH2CO2H, -CH2CH2CO2H, -CH2CONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
33. The compound of Claim 31, wherein R8 and R9 together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
34. The compound of Claim 31, wherein R4 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH2OH, -CH(OH)CH3, -CH2CO2H, -CH2CH2CO2H, -CH2CONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
35. The compound of Claim 32 or 33, wherein both the N- and C-terminal amino acid residues are of the L-configuration.
36. The compound of Claim 35, wherein R8 is hydrogen, R9 is methyl and R4 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH2OH, -CH(OH)CH3, -CH2CO2H, -CH2CH2CO2H, -CH2CONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
37. The compound of Claim 35, wherein R8 is hydrogen, R9 is -CH2CONH2 and R4 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH2OH, -CH(OH)CH3, -CH2CO2H, -CH2CH2CO2H, -CH2CONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
38. The compound of Claim 35, wherein R8 is hydrogen, R9 is benzyl and R4 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH2OH, -CH(OH)CH3, -CH2CO2H, -CH2CH2CO2H, -CH2CONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
39. The compound of Claim 35, wherein R8 is hydrogen, R9 is 4-hydroxybenzyl and R4 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH2OH, -CH(OH)CH3, -CH2CO2H, -CH2CH2CO2H, -CH2CONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
40. The compound of Claim 29 having structural Formula (XVII):

wherein R3 is hydrogen or methyl;
R8 is hydrogen or methyl; and R9 is selected from the group consisting of hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl and substituted heteroarylalkanyl, or optionally R8 and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
41. The compound of Claim 40, wherein R8 is hydrogen and R9 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH2OH, -CH(OH)CH3, -CH2CO2H, -CH2CH2CO2H, -CH2CONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
42. The compound of Claim 40, wherein R8 and R9 together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
43. The compound of Claim 29 having structural Formula (XVIII):

wherein R3 is hydrogen or methyl;
R4 is selected from the group consisting of hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl and substituted heteroarylalkanyl;
R8 is hydrogen or methyl; and R9 is selected from the group consisting of hydrogen, alkanyl, substituted alkanyl, aryl, substituted aryl, arylalkanyl, substituted arylalkanyl, cycloalkanyl, heteroarylalkanyl and substituted heteroarylalkanyl, or optionally, R8 and R9 together with the atoms to which they are bonded form a cycloheteroalkyl or substituted cycloheteroalkyl ring.
44. The compound of Claim 43, wherein R8 is hydrogen and R9 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH2OH, -CH(OH)CH3, -CH2CO2H, -CH2CH2CO2H, -CH2CONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
45. The compound of Claim 43, wherein R8 and R9 together with the atoms to which they are bonded form an azetidine, pyrrolidine or piperidine ring.
46. The compound of Claim 44 or 45, wherein R4 is selected from the group consisting of hydrogen, methyl, isopropyl, isobutyl, sec-butyl, t-butyl, cyclopentyl, cyclohexyl, -CH2OH, -CH(OH)CH3, -CH2CO2H, -CH2CH2CO2H, -CH2CONH2, -CH2CH2CONH2, -CH2CH2SCH3, -CH2SH, -CH2(CH2)3NH2, -CH2CH2CH2NHC(NH)NH2, phenyl, benzyl, 4-hydroxybenzyl, 4-imidazolylmethyl and 3-indolylmethyl.
47. A method for treating or preventing migraine, nausea, vomiting, anxiety, seizures, convulsions, trauma of the central nervous system, and neurodegenerative conditions including Friedrich's disease, Parkinson's disease, Alzheimer's disease, Huntington's disease, amyotrophic lateral sclerosis (ALS), multiple sclerosis (MS) and Pick disease in a patient, comprising administering to a patient in need of such treatment or prevention a therapeutically effective amount of a compound according to Claim 1 or 29.
48. A pharmaceutical composition comprising a therapeutically effective amount of a compound according to Claim 1 or 29 and a pharmaceutically acceptable vehicle.
CA002510677A 2003-01-28 2004-01-28 Amino acid derived prodrugs of propofol, compositions and uses thereof Abandoned CA2510677A1 (en)

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Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1882548A (en) * 2003-10-24 2006-12-20 奥斯佩克斯制药公司 pH sensitive prodrugs of 2,6-diisopropylphenol
US7241807B2 (en) * 2004-07-12 2007-07-10 Xenoport, Inc. Prodrugs of propofol, compositions and uses thereof
EP1781596B1 (en) * 2004-07-12 2008-10-08 Xenoport, Inc. Amino acid derived prodrugs of propofol compositions and uses thereof
ATE456552T1 (en) * 2004-12-23 2010-02-15 Xenoport Inc SERINAMINIC ACID DERIVED PRODRUGS OF PROPOFOL, COMPOSITIONS, USES AND CRYSTALLINE FORMS THEREOF
WO2008052044A2 (en) * 2006-10-26 2008-05-02 Xenoport, Inc. Use of derivatives of propofol for treating diseases associated with oxidative stress
CN101715437B (en) 2007-05-09 2013-06-12 特色疗法股份有限公司 Stereoisomers propofol therapeutic compounds
MX2009012125A (en) 2007-05-09 2010-02-18 Pharmacofore Inc Therapeutic compounds.
US20090005444A1 (en) * 2007-06-21 2009-01-01 Xenoport, Inc. Use of propofol prodrugs for treating alcohol withdrawal, central pain, anxiety or pruritus
US20090076141A1 (en) * 2007-09-14 2009-03-19 Xenoport, Inc. Use of Propofol Prodrugs for Treating Neuropathic Pain
WO2009092071A2 (en) * 2008-01-18 2009-07-23 Shire Llc Amino acid and peptide pro-drugs of phenolic analgesics and uses thereof
CN101298426B (en) * 2008-06-17 2012-08-22 靳广毅 Water-soluble derivate of 2,6-diisopropyl phenol and use thereof
MX2011010448A (en) * 2009-04-02 2011-10-28 Shire Llc Novel dicarboxylic acid linked amino acid and peptide prodrugs of opioids and uses thereof.
US20120316247A1 (en) * 2009-10-20 2012-12-13 The General Hospital Corporation Prevention and treatment of post-operative cognitive dysfunction (pocd)
CN101906039B (en) * 2010-06-23 2013-05-08 四川大学华西医院 Hydroxyl acid ester compound of substituted phenol, preparation method and application in drug
FR2976944A1 (en) * 2011-06-21 2012-12-28 Centre Nat Rech Scient PEPTIDE PRODUCTS
CN102381972B (en) * 2011-09-08 2013-10-30 四川大学华西医院 Propofol hydroxy acid ester compound with ester constitutional terminal, preparation method for same and application thereof
CN102617380B (en) * 2012-03-12 2014-04-02 成都一平医药科技发展有限公司 Carbonic acid diester water-soluble derivant of amino acid and propofol, and application of carbonic acid diester water-soluble derivant of amino acid and propofol
CN103880754A (en) * 2012-12-21 2014-06-25 西藏海思科药业集团股份有限公司 Alkaline amino acid ester salt of propofol
WO2015120821A1 (en) * 2014-02-17 2015-08-20 江苏恩华络康药物研发有限公司 Water-soluble propofol derivatives and uses thereof
CN108558685B (en) * 2017-06-08 2020-11-20 西安力邦制药有限公司 2, 6-disubstituted phenol meglumine derivative and application thereof
US11547714B2 (en) 2020-02-05 2023-01-10 Epalex Corporation Fospropofol salts, methods and compositions
US11478490B1 (en) 2021-03-30 2022-10-25 Epalex Corporation Fospropofol formulations
US11439653B1 (en) 2021-03-30 2022-09-13 Epalex Corporation Fospropofol formulations
US11628178B2 (en) 2019-03-26 2023-04-18 Epalex Corporation Fospropofol methods and compositions
CN111920789A (en) * 2020-08-17 2020-11-13 中山大学附属第一医院 Application of propofol in improving cognitive function of mice by promoting formation of dopamine neural network in developing brain
CA3201673A1 (en) * 2020-12-21 2022-06-30 Suoding Cao Drug conjugate, preparation method therefor, and use thereof

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845770A (en) * 1972-06-05 1974-11-05 Alza Corp Osmatic dispensing device for releasing beneficial agent
US3916899A (en) * 1973-04-25 1975-11-04 Alza Corp Osmotic dispensing device with maximum and minimum sizes for the passageway
ZA791659B (en) 1978-04-17 1980-04-30 Ici Ltd Process and apparatus for spraying liquid
GB8504253D0 (en) * 1985-02-19 1985-03-20 Ici Plc Electrostatic spraying apparatus
DE3815221C2 (en) * 1988-05-04 1995-06-29 Gradinger F Hermes Pharma Use of a retinol and / or retinoic acid ester-containing pharmaceutical preparation for inhalation for acting on the mucous membranes of the tracheo-bronchial tract, including the lung alveoli
US4962882A (en) * 1989-11-27 1990-10-16 Sarazen Jr Paul M Ventilator
US5698155A (en) * 1991-05-31 1997-12-16 Gs Technologies, Inc. Method for the manufacture of pharmaceutical cellulose capsules
GB9225098D0 (en) 1992-12-01 1993-01-20 Coffee Ronald A Charged droplet spray mixer
GB9226717D0 (en) 1992-12-22 1993-02-17 Coffee Ronald A Induction-operated electro-hydrodynamic spray device with means of modifying droplet trajectories
GB9406171D0 (en) 1994-03-29 1994-05-18 Electrosols Ltd Dispensing device
GB9406255D0 (en) 1994-03-29 1994-05-18 Electrosols Ltd Dispensing device
GB9410658D0 (en) 1994-05-27 1994-07-13 Electrosols Ltd Dispensing device
JP3585127B2 (en) * 1995-03-14 2004-11-04 シーメンス アクチエンゲゼルシヤフト Ultrasonic spray system
WO1996028205A1 (en) * 1995-03-14 1996-09-19 Siemens Aktiengesellschaft Ultrasonic atomizer device with removable precision dosing unit
NZ504021A (en) * 1997-10-17 2003-04-29 Systemic Pulmonary Delivery Lt Method and apparatus for delivering aerosolized medication having air discharged through air tube directly into plume of aerosolized medication
US6254853B1 (en) * 1998-05-08 2001-07-03 Vyrex Corporation Water soluble pro-drugs of propofol
US6204257B1 (en) * 1998-08-07 2001-03-20 Universtiy Of Kansas Water soluble prodrugs of hindered alcohols
US7060290B1 (en) 1999-02-18 2006-06-13 Supergen, Inc. Phosphocholine linked prodrug derivatives
AU3898700A (en) 1999-03-15 2000-10-04 John Claude Krusz Treatment of acute headaches and chronic pain using rapidly-cleared anesthetic drug at sub-anesthetic dosages
US6362234B1 (en) 2000-08-15 2002-03-26 Vyrex Corporation Water-soluble prodrugs of propofol for treatment of migrane

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