WO1995018807A1 - Novel 3-(substituted methyl)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one derivatives useful as antitumor agents - Google Patents

Novel 3-(substituted methyl)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one derivatives useful as antitumor agents Download PDF

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Publication number
WO1995018807A1
WO1995018807A1 PCT/GB1995/000024 GB9500024W WO9518807A1 WO 1995018807 A1 WO1995018807 A1 WO 1995018807A1 GB 9500024 W GB9500024 W GB 9500024W WO 9518807 A1 WO9518807 A1 WO 9518807A1
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group
oxa
azabicyclo
heptan
substituted
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PCT/GB1995/000024
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French (fr)
Inventor
Rajeshwar Singh
Tomohiro Yamashita
Charles Fiakpui
George Thomas
Chan Ha
Hiroshi Matsumoto
Toshio Otani
Shinji Oie
Ronald Micetich
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Taiho Pharmaceutical Co. Limited
Synphar Laboratories, Inc.
Appledene Limited
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Application filed by Taiho Pharmaceutical Co. Limited, Synphar Laboratories, Inc., Appledene Limited filed Critical Taiho Pharmaceutical Co. Limited
Priority to JP7518375A priority Critical patent/JPH08507552A/en
Priority to AU13250/95A priority patent/AU678879B2/en
Priority to US08/513,802 priority patent/US5994342A/en
Priority to EP95904658A priority patent/EP0688324A1/en
Publication of WO1995018807A1 publication Critical patent/WO1995018807A1/en

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D503/00—Heterocyclic compounds containing 4-oxa-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula:, e.g. oxapenicillins, clavulanic acid derivatives; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups

Definitions

  • the present invention relates to novel 3-(substituted methyl)-4-oxa-1-azabicyclo[3.2.0] heptan-7-one derivatives, and to the preparation of such compounds, and to their incorporation in pharmaceutical compositions, and to their use as pharmacological agents, in particular for use in anti-cancer treatment.
  • the chemical unstability may be due to the intermolecular
  • the present invention is based on the discovery that certain 3-(substituted methyl)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one derivatives exhibit excellent activity against sensitive and resistant tumor cells.
  • R is hydrogen, -COR 1 ,wherein R 1 is (i) a C 1 -C 6 alkyl group which may be substituted by 1-3
  • R 4 is a C 1 -C 6 alkyl group or a phenyl group which may be substituted by 1-3 substituents selected from C 1 -C 6 alkyl group, halogen or Ci-C ⁇ alkoxy group; 1-2 amino acid residue which may be substituted with protective group, when X is O,
  • R is 1-2 amino acid residue which may be
  • the pharmaceutically acceptable salts of formula I are selected from sodium, potassium, magnesium, calcium, hydrogen chloride, tartaric acid, succinic acid, fumaric acid or p-toluenesulfonic acid.
  • C 1 -C 6 alkyl group as substitutents in R 1 , R 2 , R 3 or R 4 are straight or branched chain alkyl group having 1-6 carbon atoms such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, secbutyl, tert-butyl, pentyl, 3-methylbutyl, hexyl and the like.
  • heteroaryl group in R 1 examples include 1,2,3-triazole, 1,2,4-triazole, thiophene, pyridine and the like.
  • C 2 -C 4 alkenyl group as defined in R 1 are alkenyl groups having 2-4 carbon atoms such as ethenyl, 1-propenyl, 2-propenyl, 1-butenyl, 3-butenyl and the like.
  • C 2 -C 4 alkynyl group as defined in R 1 are ethynyl, 1-propynyl, 2-propynyl, 1-butynyl, 3-butynyl and the like.
  • heteroaryl group or heteroaryl substituent in R 1 are C 5 -C 6 heteroaryl group which may have 1-3 heteroatoms selected from nitrogen and sulfar such as 1,2,3-triazole, 1,2,4 triazole, thiophene, pyridine and the like.
  • C 1 -C 6 alkoxy group as substituents in R 1 or R 4 are methoxy, ethoxy, propyloxy, butyloxy, pentyloxy, hexyloxy and the like.
  • amino acid residue refers to the remaining group after the removal of the hydroxy group from a carboxy group of an amino acid.
  • 1-2 amino acid used herein is one amino acid or one dipeptids constituted of two amino acids which are bonded each other through a peptide bond.
  • Example of amino acid are ⁇ -amino acids which compose organisms' protein or their optical isomers such as glycine, D- or L-alanine, D- or L-valine, D- or L-leucine, D- or L-isoleucine, D- or L- serine, D- or L-threonine, D- or L-aspartic acid, D- or L-glutamic acid, D- or L-asparagine, D- or L-glutamine, D- or L-lysine, D- or L-arginine, D- or L-cysteine, D- or L-cystine, D- or L-methionine, D- or L-phenylalanine, D- or L-tyrosine, D- or L-tryptophane, D- or L-histidine, D- or L-proline and the like.
  • glycine D- or L-alanine, D- or L-valine, D- or L-
  • protective group in amino acid residue are benzyl and/or acyl group such as acetyl, 2-thienylacetyl,
  • the derivative of formula I wherein X is NH, having (3R,5R) or (3S,5S) configuration at two asymmetric carbons on 4-oxa-1-azabicyclo[3.2.0]heptan-7-one ring system or the mixture of them.
  • the derivative of formula I wherein X is 0, having (3R,5S) or (3S,5R) configuration at two asymmetric carbons on 4-oxa-1-azabicyclo[3.2.0]heptan-7-one ring system or the mixture of them.
  • R is: hydrogen
  • R 1 is selected from methyl, propyl, 1- methylethyl, chloromethyl, azidomethyl, (1,2,3- triazol-1-yl) methyl, formyloxymsthyl, hydroxymethyl, trifluoromethyl, pentyl, 5-bromopentyl, 5-formyloxypentyl, 5-azidopentyl, 5-(1,2,3-triazol-1-yl)pentyl, 5- (acetamido)pentyl, cyclohexyl, 2-carboxyethyl, benzyloxy, phenyl, 4-hydroxyphenyl, 4-methoxyphenyl, 3,4-dimethyoxyphenyl, 4-fluorophenyl, 2, 5-difluorophenyl, 2,4,5-trifluorophenyl, 4-cyanophenyl, thiophen- 2-yl-methyl, pyridin-3-yl, diethylamino, (7-o
  • R 4 is selected from methyl, 4-methyl- phenyl, 4-chlorophenyl or 4-methoxyphenyl group.
  • R is;
  • R 1 is selected from aminomethyl, N- (N-benzyloxycarbonylaminoacetyl) aminomethyl, N- (aminoacetyl)aminomethyl, N-(L-2-N-benzyloxycarbonyl- aminopropanoyl)aminomethyl, N-(L-2-aminopropanoyl)- aminomethyl, N-(L-2-N-benzyloxycarbonylamino-3-methyl butyryl)aminomethyl, N-(L-2-N-benzyloxycarbonylamino-3- methylbutyryl)aminomethyl, N-(L-2-amino-3-methyl- butyryl)aminomethyl, L-1-N-(benzyloxycarbonyl)- aminoethyl, L-1-aminoethyl, L-1-N-(L-2-N-benzyloxycarbonyamino-3-methylbutyryl) aminoethyl, L-1-N-(L-2-N-N-benzy
  • Examples of pharmaceutically acceptable salts are sodium,
  • the bicyclic nucleus carries two asymmetric carbon atoms at position 3 and 5 and can exist as 4-diastereoisomers.
  • the preferred isomer is that in which the hydrogen atoms at C 3 and C 5 are trans to each other for superior toxicity against different malignant cells such as P388, KB, NUGC4, WI38, L-1210, sarcoma 180 and colon 26.
  • Such diasterioisomers and their racemic mixtures are also included within the use of the oxapenam derivatives as antitumor agents.
  • Antitumor activity of compounds described above is expected against some solid cancers such as congress lung, breast, liver, uterus and leukemia and so on.
  • the present invention relates to the certain 3-(substituted methyl)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one derivatives having excellent antitumor activity.
  • the compounds of this invention are characterized by having ester (-OCR 1 ), amide (NHCOR 1 ) and
  • L and Y are suitably selected from leaving groups such as chlorine, bromine, iodine, methanesulfonyloxy group, trifluoromethanesulfonyloxy group, p-toluenesulfonyloxy group and p-chlorobenzenesulfonyloxy group.
  • M is sodium, potassium or trimethvlsilyl and R 1 is a C 1 -C 6 alkyl group which may be substituted by 1-3 substituents selected from halogen, hydroxy, formyloxy, azidc, carboxyl, heteroaryl or acetamide; a C 2 -C 4 alkenyl group; a C 2 -C 4 alkynyl group; a C 3 -C 6 cycloalkyl group; a phenyl group which may be substituted by 1-3 substituents selected from hydroxy, halogen, C 1 -C 6 alkoxy group or cyano; a C 5 -C 6 heteroaryl group; a NR 2 R 2 wherein R 2 and R 3 are the same or different and each is a hydrogen, C 1 -C 6 alkyl group or (7-oxo-1-aza-4-oxabicyclo[3.2.0]hept-3-yl) methyl group or bezyloxy group;.
  • R 4 is the same as def ined above .
  • amide derivative of amino acids and dipeptides of general formula I were alternatively prepared by the synthetic scheme as shown below in two steps.
  • 3-aminomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one(7) was coupled with either N-protected acid in the presence of dicyclohexylcarbodiimide (DCC) or acid chloride in the presence of a base or activated ester followed by coupling with another N-protected amino acid which may or may not be the same.
  • DCC dicyclohexylcarbodiimide
  • the resulting compounds were deprotected in the presence of H 2 and Palladium catalyst under pressure or atmospheric pressure. >
  • R 5 and R 6 are selected from hydrogen, methyl, 1-methylethyl, phenylmethyl, 2-carboxyethyl, carboxymethyl, hydroxymethyl, benzyloxymethyl, acetyloxymethyl, aminobutyl and Z is benzyloxycarbonyl, acetyl, 2-thienylacetyl or tert-butoxycarbonyl.
  • ester derivative of amino acids and dipeptides were prepared by the coupling of 3-bromomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one(2) with N-protected aminoacids in the presence of a base.
  • the amine group was deprotected and couples with another molecule of amino acid as shown in the scheme below.
  • R 5 , R 6 and Z are defined as above.
  • the reactants are reacted together with solvent at elevated or low temperatures for sufficient time to allow the reaction to proceed to completion.
  • the reaction conditions will depend upon the nature and reactivity of the reactants.
  • a base is used in a reaction, they are selected from triethylamine, pyridine, 4-dimethylamino-pyridine, diisopropylethylamine, 1,5,-Dizabicyclo[4.3.0]non-5-ene, 1,8-Dizabicyclo[5.4.0]undec-7-ene, sodium carbonate, potassium carbonate or cesium carbonate.
  • the solvents of choice for the reaction are non reactive solvents such as acetonitrile, tetrahydrofuran, ethanol, methanol,
  • Solvent mixtures may also be utilized.
  • Reaction temperatures would generally range from between -70°C to 140°C.
  • the preferred molar ratio of reactants are 1:1 to 5.0.
  • the reaction time range from C.5 to 72 hours, depending on the
  • N-prctective group is carried out either by hydrogenation in the presence of acids, such as hydrochloric acid or acetic acid, or by hydrolysis with appropriate acids, such as hydrochloric acid, triflucriacetic acid cr acetic acid in solvents such as methanol, ethanol, propanol or ethylacetate.
  • acids such as hydrochloric acid or acetic acid
  • hydrolysis with appropriate acids such as hydrochloric acid, triflucriacetic acid cr acetic acid in solvents such as methanol, ethanol, propanol or ethylacetate.
  • hydrogenation reaction is usually carried out in the presence of a metal catalyst, such as Pd, Pt or Rh, under normal pressure to high pressure.
  • a metal catalyst such as Pd, Pt or Rh
  • the compound of the invention when used as an agent for treating malignant tumors of mammals including humans, may take
  • parenteral preparations such as injections, suppositories, aerosols and the like
  • oral preparations such as tablets, coated tablets, powders, granules, capsules, liquids and the like. Injections are generally
  • an excipient for the formulation of solid preparations for oral administration, an excipient, and if desired, a binder, disintegrator, lubricant, coloring agent, corrigent, flavor, etc. are added to the compound of the invention, and then tablets, coated tablets, granules, powders, capsules or the like are prepared in a conventional manner.
  • a pH adjusting agent, buffer, stabilizer, isotonic agents, local anesthetic or the like is added to the active ingredient of the invention, and injections for subcutaneous, intramuscular or intravenous administration can be prepared in a conventional manner.
  • a base, and if desired, a surfactant are added to the active ingredient of the invention, and the suppositories are prepared in a conventional manner.
  • excipients such as lactose, sucrose, sodium chloride, starches, calcium carbonate, kaolin, crystalline cellulose, methyl cellulose, glycerin, sodium alginate, gum arabic and the like
  • binders such as polyvinyl alcohol, polyvinyl ether, polyvinyl pyrrolidone, ethyl cellulose, gum arabic, schellac, sucrose, water, ethanol, propanol, carboxymethylceilulose, potassium phosphate and the like
  • lubricants such as magnesium stearate, talc and the like, and further include additives such as usual known coloring agents, disintegrators and the like.
  • bases useful for the formulation of suppositories are, for example, oleaginous bases such as cacao butter, polyethylene glycol, lanolin, fatty acid triglycerides, Witepsol (trademark, Dynamite Nobel Co., Ltd.) and the like.
  • Liquid preparations may be in the form of aqueous or oleaginous suspension, solution, syrup, elixir and the like, which can be prepared by a
  • the amount of the compound (I) of the invention to be incorporated into the pharmaceutical composition of the invention varies with the dosage form, solubility and chemical properties of the compound, administration route, administration scheme and the like.
  • the amount is about 1 to 25 w/w% in the case of oral preparations, and about 0.1 to about 5 w/w% in the case of injections which are parenteral preparations.
  • the dosage of the compound (I) of the invention is suitably determined depending on the individual cases taking symptoms, age and sex of the subject and the like into consideration.
  • the dosage in the case of oral administration is about 50 to 1000 mg per day for an adult in 2 to 4 divided doses
  • the dosage in the case of injection for example, by intravenous administration is 2 ml (about 1 to 50 mg) which is administered once a day for adults wherein the injection may be diluted with physiological saline or glucose injection liquid if so desired, and slowly administered over at least 5 minutes.
  • the dosage in the case of suppositories is about 1 to 500 mg which is administered once or twice a day at an interval of 6 to 12 hours wherein the
  • suppositories are administered by insertion into the rectum.
  • Triethylamine (737mg) and Hexamethylphosphoric triamide (5ml) was heated with stirring at 60-70°C fcr 24hrs.
  • the reaction mixture was then diluted with Ethyl acetate, washed with water, brine and dried over Magnesium sulfate.
  • the residual oil after removal of solvent in vacuo, was purified by silicagel column chromatography using Hexane-Ethyl acetate (2:3) as eluent. The desired
  • Triethylamine was added. Under cooling, Thiophen-2-yl-acetyl chloride, prepared from 1.0g of Thiophen-2-yl-acetic acid, was slowly added to it and the mixture was stirred at room temperature for 1 hr. The solution was filtered through silica gel column and the title compound was obtained as oil.
  • reaction mixture was purified on HP-20 column by elution with water. The title compound was obtained after
  • 1,3-Dicyclohexyl carbodiimide (740mg, 3.56mmol) was added to an ice-cold solution of N-Benzyloxycarbonyl-L-2-aminopropanoic acid (1.33g, 5.98mmol) in Ethyl acetate (80ml) and the mixture was stirred for 1 hr.
  • the N-Benzyloxycarbonyl-L-2-aminopropanoic acid-DCC complex was added to the ice-cold Ethyl acetate solution of the amine prepared above. The mixture was stirred at room temperature overnight.
  • the precipitated urea was filtered off, the filtrate was concentrated and passed through a silica gel column using Ethyl acetate as the eluent to give a thick oil (41A).
  • Acetonitrile was added to the residue and solid was collected by filtration(46B) .
  • N-protected title compound (48A) was obtained as oil.
  • the N-protected ester derivative obtained above was deprotected by catalytic hydrogenation in Methanol using 5% Palladium on activated carbon at room temperature (50psi, 1hr). After removal of catalyst, 1N-HCl (1.7ml) was added to the reaction mixture under cooling condition and resulted solution was then purified by HP-20 column chromatography using water as eluent. The title compound (48B) was obtained after lyophilization as solid.
  • N-protected title compound (53A) was obtained as oil.
  • N-protected title compound (63A) was obtained as white solid.
  • Hexamethylphosphoric triamide (10ml) was heated with stirring at 60-70°C for 16hrs.
  • the reaction mixture was then diluted with Ethyl acetate, washed with water, brine and dried over Magnesium sulfate.
  • the residual oil after removal of solvent in vacuo, was purified by silicagel column chromatography eluted with Hexane-Ethyl acetate (1:1).
  • the desired title compound ( 65A) was obtained as oil.
  • Diacetyl compound ( 75B ) is :
  • KB cells were cultivated in Eagles minimum essential medium supplemented with 10% calf serum and incubated at 37°C in a
  • TD 50 values were calculated from linear regression ines of the log-logit plot.
  • L1210 and P388 cells were cultivated in RPMI 1640 medium
  • TD 50 values were calculated from linear regression ines of the log-logit plot.
  • the compounds of general formula (I) were tested in vivo against Sarcoma 180 xenografted tumor to mice as illustrated herein after.
  • Sarcoma 180, 5 ⁇ 10 6 cells were inoculated by S.C. to male ICR mice (6 weeks old) on day 0. Drugs were administered on days 1, 5 and 9. Mice were killed and tumor weight was measured on day 12 after transplantation. The percentage inhibition of tumor growth was calculated from the mean tumor weight cf the treated group
  • mice used in each group was between 6 to 7.
  • the percentage inhibition of tumor Sarcoma 180 group by compound cf formula (I) are summarized in Table 3.

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Abstract

The present invention is based on the discovery that certain 3-(substituted methyl)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one derivatives of formula (I) or a pharmaceutically acceptable salt thereof are useful as antitumor agents against sensitive and resistant tumor cells. In Formula (I) X is NH or O, when X is NH, R is hydrogen, -COR1, wherein R1 is (i) a C1-C6 alkyl group which may be substituted by 1-3 substituents selected from halogen, hydroxy, formyloxy, azido, carboxyl, heteroaryl or acetamide, (ii) a C2-C4 alkenyl group, (iii) a C2-C4 alkynyl group, (iv) a C3-C6 cycloalkyl group, (v) a phenyl group which may be substituted by 1-3 substituents selected from hydroxy, halogen, C1-C6 alkoxy group or cyano, (vi) a C5-C6 heteroaryl group, (vii) an NR2R3 wherein R2 and R3 are the same or different and each is a hydrogen, C1-C6 alkyl group or (7-oxo-1-aza-4-oxabicyclo[3.2.0]hept-3-yl)methyl group or (viii) benzyloxy group; -SO2R4 wherein R4 is a C1-C6 alkyl group or a phenyl group which may be substituted by 1-3 substituents selected from C1-C6 alkyl group, halogen or C1-C6 alkoxy group; 1-2 amino acid residue which may be substituted with protective group; when X is O, R is 1-2 amino acid residue which may be substituted with protective group.

Description

NOVEL 3-(SUBSTITUTED METHYL) -4-OXA-1-AZABICYCLO[3.2.0] HEPTAN-7-ONE DERIVATIVES USEFUL AS ANTITUMOR AGENTS
The present invention relates to novel 3-(substituted methyl)-4-oxa-1-azabicyclo[3.2.0] heptan-7-one derivatives, and to the preparation of such compounds, and to their incorporation in pharmaceutical compositions, and to their use as pharmacological agents, in particular for use in anti-cancer treatment.
Background of the Invention
Since the invention of G0069A (JP 61-2125G7) and Tü 1718 (DE
3727651), we paid attention to develop ß-lactam class of compounds as antitumor agents. However, there were a lot of difficulties to obtain these compounds in large scales. For example, only 20 mg of G0069A was isolated from 10L fermentation broth even after under well controlled fermentation techniques and suitable
experimental conditions. On the other hand, another ß-lactam compound having the same stereochemistry at C5, (3R,5S)-3-hydroxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (clavam 1, G0069B) was isolated by Brown and Evans (J. Chem. Soc. Chem. Comm. 1979, 282) from the culture of streptomyces clavuligerus, which is reported to exhibit antifungal activity. We have synthesized clavam 1 and have done extensive biological evaluation. We found that clavam 1 exhibit excellent antitumor activity both in vitro and in vivo but is chemically unstable.
Figure imgf000004_0001
The chemical unstability may be due to the intermolecular
interaction of -OH to the ß-lactam ring which results in the decomposition of product.
As a part of the program directed toward the development of ß-lactam class of compounds as novel antitumor agents, it is necessary to get compounds which are relatively easy to
synthesize, chemically stable and have strong antitumor activity. Summary of the Inventinn
The present invention is based on the discovery that certain 3-(substituted methyl)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one derivatives exhibit excellent activity against sensitive and resistant tumor cells.
In accordance to the present invention, there is provided a 3-(substituted methyl)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one derivative of general formula I or pharmaceutically acceptable salt thereof,
Figure imgf000005_0001
wherein X is NH or O,
when X is NH,
R is hydrogen, -COR1,wherein R1 is (i) a C1-C6 alkyl group which may be substituted by 1-3
substituents selected from halogen, hydroxy, formyloxy, azido, carboxyl, heteroaryl or acetamide, (ii) a C2-C4 alkenyl group, (iii) a C2-C4 alkynyl group, (iv) a C3-C6 cycloalkyl group, (v) a phenyl group which may be substituted by 1-3 substituents selected from hydroxy, halogen, C1-C6 alkoxy group or cyano, (vi) a C5-C6 heteroaryl group, (vii) a NR2R3 wherein R2 and R3 are the same or different and each is a hydrogen, C1-C6 alkyl group or (7-oxo-1-aza-4-oxabicyclo[3.2.0]hept-3- yl)methyl group or (viii) benzyloxy group;
-SO2R4 wherein R4 is a C1-C6 alkyl group or a phenyl group which may be substituted by 1-3 substituents selected from C1-C6 alkyl group, halogen or Ci-Cβ alkoxy group; 1-2 amino acid residue which may be substituted with protective group, when X is O,
R is 1-2 amino acid residue which may be
substituted with protective group.
The pharmaceutically acceptable salts of formula I are selected from sodium, potassium, magnesium, calcium, hydrogen chloride, tartaric acid, succinic acid, fumaric acid or p-toluenesulfonic acid.
Examples of C1-C6 alkyl group as substitutents in R1, R2, R3 or R4 are straight or branched chain alkyl group having 1-6 carbon atoms such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, secbutyl, tert-butyl, pentyl, 3-methylbutyl, hexyl and the like.
Examples of halogen atoms as substituents in R1 or R4 are
fluorine, chlorine, bromine or iodine.
Examples of heteroaryl group in R1 are 1,2,3-triazole, 1,2,4-triazole, thiophene, pyridine and the like.
Examples of C2-C4 alkenyl group as defined in R1 are alkenyl groups having 2-4 carbon atoms such as ethenyl, 1-propenyl, 2-propenyl, 1-butenyl, 3-butenyl and the like.
Examples of C2-C4 alkynyl group as defined in R1 are ethynyl, 1-propynyl, 2-propynyl, 1-butynyl, 3-butynyl and the like.
Examples of C3-C6 cycloalkyl group as defined in R1 are
cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl and the like.
Examples of heteroaryl group or heteroaryl substituent in R1 are C5-C6 heteroaryl group which may have 1-3 heteroatoms selected from nitrogen and sulfar such as 1,2,3-triazole, 1,2,4 triazole, thiophene, pyridine and the like. Example of C1-C6 alkoxy group as substituents in R1 or R4 are methoxy, ethoxy, propyloxy, butyloxy, pentyloxy, hexyloxy and the like.
The term "amino acid residue" used herein refers to the remaining group after the removal of the hydroxy group from a carboxy group of an amino acid. The term "1-2 amino acid" used herein is one amino acid or one dipeptids constituted of two amino acids which are bonded each other through a peptide bond.
Example of amino acid are α-amino acids which compose organisms' protein or their optical isomers such as glycine, D- or L-alanine, D- or L-valine, D- or L-leucine, D- or L-isoleucine, D- or L- serine, D- or L-threonine, D- or L-aspartic acid, D- or L-glutamic acid, D- or L-asparagine, D- or L-glutamine, D- or L-lysine, D- or L-arginine, D- or L-cysteine, D- or L-cystine, D- or L-methionine, D- or L-phenylalanine, D- or L-tyrosine, D- or L-tryptophane, D- or L-histidine, D- or L-proline and the like.
Examples of protective group in amino acid residue are benzyl and/or acyl group such as acetyl, 2-thienylacetyl,
benzyloxycarbonyl, tert-butcxycarbonyl and the like.
Preferably, the derivatives of formula I wherein X is NH and R is -COR1 wherein R1 is C1-C6 alkyl group which may be substituted by 1-3 substituents selected from halogen, hydroxy, forrπyloxy, azido, carboxy, heteroaryl or acetamido.
Preferably, the derivatives of formula I wherein X is NH and R is -COR1 wherein R1 is a NR2R3 wherein R2 and R3 are the same or different and each is a hydrogen, C1-C6, alkyl group or (7-oxo-1-aza-4-oxabicyclo[3.2.0]hept-3-yl)methyl group.
Preferably, the derivatives of formula I wherein X is NH or O and R is 1-2 amino acid residue which may be substituted with
protective group.
Preferably, the derivative of formula I wherein X is NH, having (3R,5R) or (3S,5S) configuration at two asymmetric carbons on 4-oxa-1-azabicyclo[3.2.0]heptan-7-one ring system or the mixture of them.
Preferably, the derivative of formula I wherein X is 0, having (3R,5S) or (3S,5R) configuration at two asymmetric carbons on 4-oxa-1-azabicyclo[3.2.0]heptan-7-one ring system or the mixture of them.
More specifically, when X is NH in general formula I, R is: hydrogen
COR1 wherein R1 is selected from methyl, propyl, 1- methylethyl, chloromethyl, azidomethyl, (1,2,3- triazol-1-yl) methyl, formyloxymsthyl, hydroxymethyl, trifluoromethyl, pentyl, 5-bromopentyl, 5-formyloxypentyl, 5-azidopentyl, 5-(1,2,3-triazol-1-yl)pentyl, 5- (acetamido)pentyl, cyclohexyl, 2-carboxyethyl, benzyloxy, phenyl, 4-hydroxyphenyl, 4-methoxyphenyl, 3,4-dimethyoxyphenyl, 4-fluorophenyl, 2, 5-difluorophenyl, 2,4,5-trifluorophenyl, 4-cyanophenyl, thiophen- 2-yl-methyl, pyridin-3-yl, diethylamino, (7-oxo-1- aza-4-oxabicyclo[3.2.0]hept-3-yl)methylamino, 3-butenyl, ethynyl, aminomethyl, N-acetylaminomethyl, N-(L-2-N- benzyloxycarbonylamino-3-methylbutyryl) aminomethyl, N- (L-2-amino-3-methylbutyryl) aminomethyl, N-(L-2-N- benzyloxycarbonylamino-3-benzyloxycarbonylpropanoyl) aminomethyl, N-(L-2-amino-3-carboxypropanoyl)aminomethyl, N-(D-4-N-benzyloxycarbonylamino-4-benzyloxycarbonylbutyryl)aminomethyl, N-(D-4-amino-4-carboxybutyryl)aminomethyl, L-1-N-benzyloxycarbonylaminoethyl, L-1-aminoethyl, D-1-N-benzyloxycarbonylaminoethyl, D-1- aminoethyl, L-1-N-benzyloxycarbonylamino-2-methylpropyl, L-1-amino-2-methylpropyl, D-1-N-benzyloxycarbonylamino-2-methylpropyl, D-1-amino-2-methylpropyl), L-1-N-benzyloxycarbonylamino-2-phnylethyl, L-1-amino-2-phenylethyl, L-1-N-benzyloxycarbonyl- amino-2-phenylethyl, L-1-N-(L-2-N-benzyloxycarbonyl- amino-3-benzyloxycarbonylpropanoyl)amino-2-phenylethyl, L-1-N-(L-2-amino-3-carboxypropanoyl)amino-2-phenylethyl, L-1-N-benzyloxycarbonylamino-2-benzyloxycarbonylethyl, L-1-amino-2-carboxyethyl, D-3-N- benzyloxycarbonylamino-3-benzyloxycarbonylpropyl, D-1- amino-3-carboxypropyl, L-3-N-benzyloxycarbonylamino-2- hydroxyethyl or L-1-amino-2-hydroxyethyl.
SO2R4 wherein R4 is selected from methyl, 4-methyl- phenyl, 4-chlorophenyl or 4-methoxyphenyl group.
When X is 0 in general formula I, R is;
COR1 wherein R1 is selected from aminomethyl, N- (N-benzyloxycarbonylaminoacetyl) aminomethyl, N- (aminoacetyl)aminomethyl, N-(L-2-N-benzyloxycarbonyl- aminopropanoyl)aminomethyl, N-(L-2-aminopropanoyl)- aminomethyl, N-(L-2-N-benzyloxycarbonylamino-3-methyl butyryl)aminomethyl, N-(L-2-N-benzyloxycarbonylamino-3- methylbutyryl)aminomethyl, N-(L-2-amino-3-methyl- butyryl)aminomethyl, L-1-N-(benzyloxycarbonyl)- aminoethyl, L-1-aminoethyl, L-1-N-(L-2-N-benzyloxycarbonyamino-3-methylbutyryl) aminoethyl, L-1-N-(L-2-N- amino-3-methylbutyryl)aminoethyl, D-1-N-(benzyloxy- carbonyl)aminoethyl, D-1-aminoethyl, D-1-N-[D-2-N- (thiophen-2-yl)acetamidopropanoyl]aminoethyl, L-1-N- (benzyloxycarbonylamino-2-methyl)propyl, L-1-amino-2- methylpropyl, L-1-N-(2-N-benzyloxycarbonylaminoacetyl)- amino-2-methylpropyl, L-1-N-(2-aminoacetyl)amino-2- methylpropyl, L-1-N-(L-2-N-benzyloxycarbonylamino-3- methylbutyryl)amino-2-methylpropyl, L-1-N-(L-2-amino-3- methylbutyryl)amino-2-methylpropyl, L-1-N-(L-2-amino-3- carboxypropanoyl)amino-2-methylpropyl, L-1-N-(L-2-N- benzyloxycarbonylamino-3-benzyloxycarbonylpropanoyl)- amino-2-methylpropyl, D-1-N-benzyloxycarbonylamino-2- methylpropyl, D-1-amino-2-methylpropyl, D-1-acetamido-2- methylpropyl, D-1-N-(D-2-N-benzyloxycarbonylamino-3- methylbutyryl)ammo-2-methylpropyl, D-1-N-(D-2-amino-3- methylbutyryl)amino-2-methylpropyl, L-1-N-(benzyloxy- carbonyl)amino-2-phenylethyl, L-1-amino-2-phenylethyl, L-2-N-benzyloxycarbonylamino-2-benzylcxycarbonylethyl, L-2-amino-2-carboxyethyl, L-1-benzyloxycarbonylamino- 2-benzyloxycarbonylethyl, L-1-amino-2-carboxyethyl, D- 1-benzyloxycarbonylamino-3-benzyloxycarbonylpropyl, D- 1-amino-3-carboxypropyl, L-1-ber.zyloxycarbonylamino-2- benzyloxyethyl, L-1-N-(D-2-N-benzyloxycarbonylaminopropanoyl)amino-2-hydroxyethyl, L-1-N-benzyloxycarbonylamino-2-hydroxyethyl, L-1-N-(D-2-N-benzyloxycarbonylaminopropanoyl)amino-2-benzyloxyethyl, L-1-N-(L-2-N- benzyloxycarbonylamino-3-methylbutyryl)amino-2- benzyloxyethyl, L-1-N-(L-2-amino-3-methylbutyroyl)- amino-2-benzyloxyethyl, L-1-acetamido-2-acetyloxyethyl, L-1-acetamido-2-hydroxyethyl, L-[1,5-di-(benzyloxycarbonylamino)pentyl], L-[1,5-di-(acetamido)pentyl] or L-5-acetamido-1-N-benzyloxycarbonylaminopentyl.
Examples of pharmaceutically acceptable salts are sodium,
potassium, calcium, magnesium or hydrogen chloride, tartaric acid, succinic acid, fumaric acid or p-toluenesulfonic acid.
Compounds of formula I may be utilized as antitumor active
compounds in medicaments, being formulated with a pharmaceutically acceptable carrier.
The bicyclic nucleus carries two asymmetric carbon atoms at position 3 and 5 and can exist as 4-diastereoisomers. In general, the preferred isomer is that in which the hydrogen atoms at C3 and C5 are trans to each other for superior toxicity against different malignant cells such as P388, KB, NUGC4, WI38, L-1210, sarcoma 180 and colon 26. Such diasterioisomers and their racemic mixtures are also included within the use of the oxapenam derivatives as antitumor agents.
Antitumor activity of compounds described above is expected against some solid cancers such as stomac lung, breast, liver, uterus and leukemia and so on.
Description of Preferred Embodiment
The present invention relates to the certain 3-(substituted methyl)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one derivatives having excellent antitumor activity. The compounds of this invention are characterized by having ester (-OCR1), amide (NHCOR1) and
sulfonamide (NHSO2R4) linkage with alkyl, aryl, heteroaryl, amino acids or dipeptide groups which were prepared by the common starting compound 2. The preparation of compound 2 was carried out by the synthetic route as described in J. Chem. Soc. Perkin Trans. I 2222, 1980, starting from 4-acetoxyazetidinone.
Figure imgf000011_0001
Wherein L and Y are suitably selected from leaving groups such as chlorine, bromine, iodine, methanesulfonyloxy group, trifluoromethanesulfonyloxy group, p-toluenesulfonyloxy group and p-chlorobenzenesulfonyloxy group.
The preparation of substituted aminomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one of general formula I was done by synthetic route as shown below.
Figure imgf000012_0001
Wherein M is sodium, potassium or trimethvlsilyl and R1 is a C1-C6 alkyl group which may be substituted by 1-3 substituents selected from halogen, hydroxy, formyloxy, azidc, carboxyl, heteroaryl or acetamide; a C2-C4 alkenyl group; a C2-C4 alkynyl group; a C3-C6 cycloalkyl group; a phenyl group which may be substituted by 1-3 substituents selected from hydroxy, halogen, C1-C6 alkoxy group or cyano; a C5-C6 heteroaryl group; a NR2R2 wherein R2 and R3 are the same or different and each is a hydrogen, C1-C6 alkyl group or (7-oxo-1-aza-4-oxabicyclo[3.2.0]hept-3-yl) methyl group or bezyloxy group;.
Certain 3-substituted amidomethyl-4-oxa-1-azabicyclo[3.2.0]-heptan-7-one general formula I when substituent of R1 in -COR1 is acetamide, azide, formyloxy, hydroxy and heteroaryl, were prepared by the scheme as shown below.
Figure imgf000013_0001
Wherein n is 1 to 5; M is defined as above.
Besides the procedure described above the stereoisomer of 3-acetyaminomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one(8, R=CH3) were prepared by the scheme as described below starting from 3-hydroxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one(1). >
Figure imgf000014_0001
Certain derivatives of formula I wherein X is NH and R is SO2R4 , were prepared by following the scheme as shown below starting from 3-azidomethyl-4 -oxa-1-azabicyclo [ 3 . 2 . 0 ] heptan-7 -one ( 6 ) .
Figure imgf000014_0002
Wherein R4 is the same as def ined above .
The amide derivative of amino acids and dipeptides of general formula I were alternatively prepared by the synthetic scheme as shown below in two steps. In the first step, 3-aminomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one(7) was coupled with either N-protected acid in the presence of dicyclohexylcarbodiimide (DCC) or acid chloride in the presence of a base or activated ester followed by coupling with another N-protected amino acid which may or may not be the same. The resulting compounds were deprotected in the presence of H2 and Palladium catalyst under pressure or atmospheric pressure. >
Figure imgf000015_0001
Wherein R5 and R6 are selected from hydrogen, methyl, 1-methylethyl, phenylmethyl, 2-carboxyethyl, carboxymethyl, hydroxymethyl, benzyloxymethyl, acetyloxymethyl, aminobutyl and Z is benzyloxycarbonyl, acetyl, 2-thienylacetyl or tert-butoxycarbonyl.
The ester derivative of amino acids and dipeptides were prepared by the coupling of 3-bromomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one(2) with N-protected aminoacids in the presence of a base. The amine group was deprotected and couples with another molecule of amino acid as shown in the scheme below.
Figure imgf000016_0001
Wherein R5, R6 and Z are defined as above.
In the above descriptions, the reactants are reacted together with solvent at elevated or low temperatures for sufficient time to allow the reaction to proceed to completion. The reaction conditions will depend upon the nature and reactivity of the reactants. Wherever a base is used in a reaction, they are selected from triethylamine, pyridine, 4-dimethylamino-pyridine, diisopropylethylamine, 1,5,-Dizabicyclo[4.3.0]non-5-ene, 1,8-Dizabicyclo[5.4.0]undec-7-ene, sodium carbonate, potassium carbonate or cesium carbonate.
The solvents of choice for the reaction are non reactive solvents such as acetonitrile, tetrahydrofuran, ethanol, methanol,
chloroform, ethylacetate, methylene chloride, dimethylformamide, dimethylsulfoxide, hexamethylphosphoric triamide or the like.
Solvent mixtures may also be utilized.
Reaction temperatures would generally range from between -70°C to 140°C. The preferred molar ratio of reactants are 1:1 to 5.0. The reaction time range from C.5 to 72 hours, depending on the
reactants.
The deprotection of N-prctective group is carried out either by hydrogenation in the presence of acids, such as hydrochloric acid or acetic acid, or by hydrolysis with appropriate acids, such as hydrochloric acid, triflucriacetic acid cr acetic acid in solvents such as methanol, ethanol, propanol or ethylacetate. The
hydrogenation reaction is usually carried out in the presence of a metal catalyst, such as Pd, Pt or Rh, under normal pressure to high pressure.
The compound of the invention, when used as an agent for treating malignant tumors of mammals including humans, may take
pharmaceutical dosage forms including parenteral preparations such as injections, suppositories, aerosols and the like, and oral preparations such as tablets, coated tablets, powders, granules, capsules, liquids and the like. Injections are generally
preferred. The above preparations are formulated in a manner known in the art.
For the formulation of solid preparations for oral administration, an excipient, and if desired, a binder, disintegrator, lubricant, coloring agent, corrigent, flavor, etc. are added to the compound of the invention, and then tablets, coated tablets, granules, powders, capsules or the like are prepared in a conventional manner.
For the formulation of injections, a pH adjusting agent, buffer, stabilizer, isotonic agents, local anesthetic or the like is added to the active ingredient of the invention, and injections for subcutaneous, intramuscular or intravenous administration can be prepared in a conventional manner. For the formulation of suppositories, a base, and if desired, a surfactant are added to the active ingredient of the invention, and the suppositories are prepared in a conventional manner.
The excipients useful for the solid preparations for oral
administration are those generally used in the art, and useful examples are excipients such as lactose, sucrose, sodium chloride, starches, calcium carbonate, kaolin, crystalline cellulose, methyl cellulose, glycerin, sodium alginate, gum arabic and the like, binders such as polyvinyl alcohol, polyvinyl ether, polyvinyl pyrrolidone, ethyl cellulose, gum arabic, schellac, sucrose, water, ethanol, propanol, carboxymethylceilulose, potassium phosphate and the like, lubricants such as magnesium stearate, talc and the like, and further include additives such as usual known coloring agents, disintegrators and the like. Examples of bases useful for the formulation of suppositories are, for example, oleaginous bases such as cacao butter, polyethylene glycol, lanolin, fatty acid triglycerides, Witepsol (trademark, Dynamite Nobel Co., Ltd.) and the like. Liquid preparations may be in the form of aqueous or oleaginous suspension, solution, syrup, elixir and the like, which can be prepared by a
conventional way using additives.
The amount of the compound (I) of the invention to be incorporated into the pharmaceutical composition of the invention varies with the dosage form, solubility and chemical properties of the compound, administration route, administration scheme and the like. Preferably the amount is about 1 to 25 w/w% in the case of oral preparations, and about 0.1 to about 5 w/w% in the case of injections which are parenteral preparations.
The dosage of the compound (I) of the invention is suitably determined depending on the individual cases taking symptoms, age and sex of the subject and the like into consideration. Usually, the dosage in the case of oral administration is about 50 to 1000 mg per day for an adult in 2 to 4 divided doses, and the dosage in the case of injection, for example, by intravenous administration is 2 ml (about 1 to 50 mg) which is administered once a day for adults wherein the injection may be diluted with physiological saline or glucose injection liquid if so desired, and slowly administered over at least 5 minutes. The dosage in the case of suppositories is about 1 to 500 mg which is administered once or twice a day at an interval of 6 to 12 hours wherein the
suppositories are administered by insertion into the rectum.
Reference Example 1
(3R, 5S)-3-[(4-Chlorobenzenesulfonyl)oxymethyl]-4-oxa-1-azabicyclo [3.2.0]heptan-7-one
A mixture of (3R, 5S)-3-Hydroxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (790mg), Triethylamne (726mg), 4-Chlorobenzenesufonyl chloride (1.51g) in Dichloromethane was stirreed for lβhrs. The reaction mixture was purified by silicagel column chromatography, using Chloroform-Ethyl acetate (5:1) as eluent and desired sulfonate was obtained as solid.
Yield: 84%
m.p. :153.6-155.1°C, [α]D 25=-90.0° (c=0.67, CDCl3)
1H NMR(CDCl3,δ) : 2.82 (1H, d, J=16.1), 2.84 (1H, dd, J=5.6, 5.9),3.28(1H, ddd, J=1.0,2.9,16.1), 3.98 (1H, dd, J=7.1, 11.7), 4.09 (1H, dd, J=4.4, 10.8), 4.21 (1H, dd,J=3.6,10.8), 4.47-4.58(1H, m), 5.27 (1H, d, J=2.6), 7.56(2H, d, J=8.7), 7.86 (2H, d, J=8.7).
IR(Nujol, cm-1) :1776,1450.
Reference Example 2 (3S, 5S)-3-Azidomethyl-4-oxa-1-azabicyclo[3.2.0]hentan-7-one
The sulfonate of reference example 1 (1.45g) was treated with Sodium azide (767mg) in Dimethylformamide (10ml) at 70°C for 2.5hrs. The reaction mixture was diluted with Ethyl acetate, washed with water, brine and dried over Magnesium sulfate. The solvent was removed in vacuo and the residue was purified by silicagel column chromatography using Hexane-Ethyl acetate (2:1) as eluent.
Yield:94%(oil)
[α]D 23=-159.0° (c=0.67, CDCl3)
3-H NMR (CDCl3 , δ) : 2 . 84 ( 1H , dd , J=11 . 7 , 6 . 9 ) , 2 . 67 ( 1H , d , J = 16 . 2 ) , 3 . 26- 3.38 (2H, m), 3.54(1H, dd, J=3.7,13.2), 3.98 (IK, dd, J=6.7, 11, 7 ),4.43-4.54 (1H, m), 5.40(1H, d, J=2.6).
IR(Neat, cm-1) : 2960, 2100, 1778. Reference Example 3
Allyl [(3RS, 5RS)-7-oxo-1-aza-4-oxabicyclo]3.2.0]hept-3-yl]
methylamino succinate
300mg of (3RS,5RS)-3-Azidomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one was hydrogenated with 200 mg of 5% Palladium on activated carbon in 30ml of Ethyl acetate at 50 psi for 1hr. After removal of catalyst by filtration, 20mg ( 0.21mmol) cf Triethylamine, 360mg (2.30mmol) of Allyl hydrogen succinate and 480mg (2.30mmol) of 1,3-Dicyclohexyl carbodiimide were added under ice cooling. The reaction mixture was stirred at room temperature for 4hrs. The resulted solid was filtered off and the filtrate was concentrated. The residue was purified by silica gel column using Hexane-Ethylacetate (1:1) as eluent. 150mg of title compound was
obtained.
Yield:30%
1H NMR(CDCl3, δ) : 2.47-2.96 (6H, m), 3.25-3.59 (3H, m), 3.94 (1H, dd, J=6.4,
11.8), 4.30-4.42 (1H, m), 4.57-4.61 (2H, m), 5.21-5.37 (3H, m) , 5.81-6.04
(2H, m).
IR (Neat, cm-1) : 3330,2955, 1783, 1736.
Example 1
(3RS, 5RS)-3-(N-Acetylaminomethyl)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (1)
2.75g of (3RS, 5RS)-3-Azidomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one, prepared by the known method, was hydrogenated over l.Og of 10% Palladium on activated carbon in Ethyl acetate at 50psi for lhr. After removal of catalyst by filteration, 2.3ml of
Triethylamine was added and then 1.2ml cf Acetyl chloride was added dropwise at 5°C. The reaction mixture was then stirred for 2hrs. The resulting mixture was loaded on flash silicagel column and eluted with Ethyl acetate. The title compound was obtained as white solid. Yield: 67%
m.p. :59-61°C
1H NMR(CDCl3,δ) : 2.02 (3H, s), 2.64 (1H, dd, J= 6.5, 11.7), 2.84 (J=16.2),
3.26-3.39 (2H, m), 3.56 (1H, ddd, J=3.6, 6.5, 14.3), 3.96 (1H, dd, J=6.5, 11.9 ),4.37 (1H, m), 5.32 (1H, d, J=2 , 7), 5.80 (1H, br. s).
IR(Nujol, cm-1) : 3565, 1768, 1646, 1540.
Example 2
(3S, 5S)-3-(N-Acetylaminomethyl)-4-oxa-1-azabicyclo[3.2.0]heotan-7-one (2)
(3S, 5S)-3-Azidomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one of reference example 2 (710mg) was hydrogenated in presence of
Acetic anhydride (431mg) in Ethyl acetate (20ml) at 50psi for 1hr. The reaction mixture was purified by silicagel column chromatography using Ethyl acetate-Acetone (5:1) as eluent and the title compound was obtained as solid.
Yield: 89%
m.p. :82.5-84.5°C, [α]D 25= -174.0° (c=1.0, CHCl3)
1H NMR(CDCl3,δ) :2.02(3H,s), 2.68 (1H, dd, J=7.0, 11.8), 2.84(1H, d, J=16.2), 3.26-3.40(2H,m), 3.56 (1H, ddd, J = 3.6, 6.3, 14.2), 3.96(1H,dd, J=6.4, 11.8), 4.31-4.43 (1H,m), 5.33 (1H, d, J=2.5) , 5.86 (1H, br. s) . IR(Nujol, cm-1) : 3340, 1764, 1646, 1540.
Example 3
(3R, 5R)-3-(N-Acetylaminomethyl)-4-oxa-1-azabicyclo[3.2.0]heotan-7-one (3)
According to the similar method as described m reference example 1,2 and example 2, the title compound was obtained from (3S, 5R)-3-Hydroxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one. Yield:87%
m.p. :86.0-87.6°C, [α]D 25=+192.0° (c=1.0, CHCl3)
1H NMR(CDCl3,δ) :2.02 (3H, s) , 2.68 (1H, dd, J=7.0, 11.8) , 2.84 (1H, d, J = 16.5) , 3.26-3.40(2H, m) , 3.56 (1H, ddd, J=3.6, 6.3, 14.2) , 3.96(1H, dd, J = 6.4, 11.8) , 4.31-4.43 (1H, m) , 5.33 (1H, d, J=2.6) , 5.87 (1H, br. s) .
IR(Nujol, cm-1) : 3345, 1764, 1646, 1542.
Example 4
(3RS, 5RS)-3-(N-Hexanoylaminomethyl)-4-oxa-1-azabicyclo[3.2.0] heptan-7-one (4)
According to the same method as desribed in example 1, the title compound was obtained as solid.
Yield:41%
m.p.:56-57°C
1H NMR(CDCl3,δ) : 0.90 (3H, t, J=6.6), 1.27-1.40 (4H, m), 1.56-1.71(2H, m),
2.20(2H,t,J=7.9),2.68 (1H, dd, J=7.0, 11.8), 2.84 (1H, d, J=16.1), 3.26-3.42 (2H, m), 3.55(1H, ddd, J=3.8, 6.3, 14.3), 3.95 (1H, dd, J=6.5, 11.8),4.31-4.43(1H, m), 5.32(1H, d, J=2.6), 5.87(1H, br. s).
IR(Nujol, cm-1) : 3320, 1762, 1659, 1631.
Example 5
(3RS, 5RS)-3-[N-(2-Methylpropanoyl)aminomethyl]-4-oxa-1-azabicyclo [3.2.0]heptan-7-one (5)
According to the same method as desribed in example 1, the title compound was obtained as solid.
Yield:53%
m.p. :76-77°C
1H NMR(CDCl3,δ) : 1.17 ( 6H, d, J=6.9), 2.35-2.42 (1H, m), 2.67 (1H, dd, J=
7.0,11.7), 2.85(1H, d, J=16.3), 3.27-3.42 (2H, m), 3.51-3.65 (1H, m), 3.96 (1H, dd, J=6.4,11.8), 4.30-4.45 (1H, m), 5.32 (1H, s), 5.75 (1H, br . s). IR(Nujol, cm-1) :3325, 2960, 1766.
Anal . :
calcd: C, 56.59; H, 7.60; N, 13.20
Found: C, 56.36; H, 7.79; N, 12.98
Example 6
(3RS, 5RS)-3-(N-Cyclohexyloarbonylaminomethyl)-4-oxa-1-azabicyclo [3.2.0]heptan-7-one (6)
According to the same method as desribed in example 1, the title compound was obtained as solid. m.p. :83-85°C
Yield: 5%
1H NMR(CDCl3,δ) : 1.14-1.95 (10H, m), 2.02-2.20(1H, m), 2.60-2.72 (1H, dd,
J=6.8, 11.7), 2.84(1H, d, J=16.2), 3.22-3.42 (2H, m), 3.46-3.64 (1H, m), 3.95 (1H, dd, J=6.5, 11.8), 4.31-4.43 (1H, m), 5.33 (1H, d, J=2.7) 5.68-5.82 (1H, m).
IR(Nujol, cm-1) :3305, 2930, 1781.
Example 7
(3RS, 5RS)-3-[N-(Trifluoroacetyl)aminomethyl]-4-oxa-1-azabicyclo [3.2.0]hentan-7-one(7)
According to the same method as desribed in example 1, the title compound was obtained as solid.
Yield:74%
m.p. :54-57°C
1H NMR(CDCl3, δ) : 2.78 (1H, dd, J=6.7, 11.5), 2.89 (1H, d, J=16.8), 3.30+ 3.49 2H, m), 3.68 (1H, ddd, J=2.4, 6.5, 14.3), 4.03 (1H, dd, J=6.5, 11.9), 4.37-4.49 (1H, m), 5.36 (1H, d, J=2.7), 6.62 (1H, br. s).
IR (Nujol, cm-1) : 3300, 1773, 1710, 1550. Example 8
(3RS, 5RS)-3-(N-Chloroacetylaminomethyl)-4-oxa-1- azabicyclo
[3.2.0]heptan-7-one (8)
According to the same method as desribed m example 1, the title compound was obtained as solid.
Yield:51%
m.p. :65-66.4°C
1H NMR(CDCl3, δ) : 2.68 (1H, dd, J=6.8, 11.7), 2.67 (1H, d, J=16.0), 3.32(1H, dd, J=2.2,16.7), 3.43-3.50 (1H, m), 3.60 (1H, ddd, J=3.6, 6.2, 14.2), 3.99 (1H, dd,J=6.5,11.9), 4.09 (2H, s), 4.36-4.46 (1H, m), 5.36 (1H, d, J=2.6), 6.88(1H,br.s).
IR(Nujol, cm-1):3315,1764.
Example 9
(3RS, 5RS)-3-[N-(Azidoacetyl)aminomethyl]-4-oxa-1-azabicyclo
[3.2.0]heptan-7-one (9)
(1) (3RS, 5RS)-3-(N-Chloroacetylaminomethyl)-4-oxa-1-azabicyclo
[3.2.0]heptan-7-one(500mg), of example 8, and Sodium azide(297mg) were stirred in Dimethyl sulfoxide(lθml) at room temperature for 14hrs. The reaction mixture was diluted with Ethyl acetate, washed with water, brine and dried over Magnesium sulfate. The residue, which obtained after removal of solvent in vacuo, was purified by silicagel column chromatography (Hexane + Ethyl acetate 1:2). The title compound was obtaine as oil.
Yield:89%
(2) (3RS, 5RS)-3-Azidomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (1.0g) was hydrogenated with 5% Palladium on activated carbon (250mg) in Ethyl acetate (20ml) at 50psi for 2hrs. To the reaction mixture, Triethylamine (121mg), Azidoacetic acid(1.21g), 1,3-Dicyclohexyl carbodiimide(2.46g) and Ethyl acetate (10ml) was added and stirred for 1hr at room temperature. After removal of solid by filtration, the solvent was removed in vacuo and the residue was purified by silicagel column chromatography (Hexane-Ethyl acetate 1:3). Desired azidoacetamide was obtained as oil. Yield:52%.
(3) A mixture of (3RS, 5SR)-3-Bromomethyl-4-oxa-1-azabicyclo
[3.2.0]heptan-7-one (1.0g), Azidoacetic acid (735mg),
Triethylamine (737mg) and Hexamethylphosphoric triamide (5ml) was heated with stirring at 60-70°C fcr 24hrs. The reaction mixture was then diluted with Ethyl acetate, washed with water, brine and dried over Magnesium sulfate. The residual oil after removal of solvent in vacuo, was purified by silicagel column chromatography using Hexane-Ethyl acetate (2:3) as eluent. The desired
azidoacetate was obtained as oil.
Yield:36%. 1H NMR(CDCl3, δ) : 2.81 (1H, dd, J=6.2, 11.7), 2.67 (1H, d, J=16.2), 3.28 (1H, ddd, J=0.7,2.8, 16.2), 3.95 (2H, s), 4.02 (1H, dd, J=6.9, 11, 7), 4.29 (2H, d,J=7.8) ,4.53-4.65 (1H, m), 5.35 (1H, d, J=2.7).
IR(Neat, cm-1) :2115,1784,1751,1193.
Example 10 (3RS, 5RS)-3-[N-(1,2,3-Triazole-1-yl)acetylaminomethyl]-4-oxa-1-azabicyclo[3.2.0]hentan-7-one (10)
150mg of (3RS, 5RS)-3-[N-(Azidoacetyl)aminomethyl]-4-oxa-1-azabicyclo[3.2.0]heptan-7-one was dissolved in 10ml of Acetone and Acetylene was bubbled at -78°C for 5 minutes. The reaction mixture was heated at 60-70°C in seal tube for 17hrs. After reaction completed, solvent was removed in vacuo and the residue was purified by silicagei column chromatography (Ethyl acetate + Acetone 3:1). The title compound was obtained as oil.
Yield: 69%
1H NMR(CDCl3,δ) :2.57 (1H, dd, J=6.9, 11.7), 2.82 (1H, d, J=16.0), 3.28
(1H, dd, J=2.9,16.8), 3.40-3.51 (2H, m), 3.94 (1H, dd, J=6.5, 11.9), 4.29- 4.41 (1H, m), 5.12 (2H,s), 5.24 (1H, d, J=2.6), 7.73 (1H, d, J=0.8), 7, 80 ( 1H , d , J=0 . 7 ) .
IR ( Neat , cm-1 ) : 3310 . 1779 , 1689 , 1555 .
Example 11
(3RS, 5RS)-3-[N-(Formyloxyacetyl)aminomethyl]-4-oxa-1-azabicyclo [3.2.0]hentan-7-one (11)
A mixture of (3RS, 5RS)-3-(N-Chloroacetylaminomethyl)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (260mg), Sodium formate (97mg) in Dimethyl sulfoxide (5ml) was stirred at room temperature for 15hrs, then 70°C for 3days. The reaction mixture was poured into water, extracted with Chloroform and dried over Magnesium sulfate. The residue which obtained after removal of solvent in vacuo, was purified by flash chrmatography (Ethyl acetate). The title compound was obtained as oil.
Yield:33%
1H NMR(CDCl3, d) : 2.68 (1H, dd, J=6.7, 11.6), 2.86 (1H, d, J=15.9), 3.27- 3.47 (2H, m), 3.64(1H, ddd, J=3.5,6.4,14.2), 4.34-4.46 (1H, m), 4.69
(2H,s), 5.34(1H, d, J=2.6), 6.48 (1H, br. s), 8.16 (1H, s).
IR (Neat, cm-1) : 3315, 1770, 1719, 1667, 1537.
Example 12
( 3RS , 5RS ) -3 - [N- (Hydroxyacetyl ) aminomethyl ]-4 -oxa- 1-azabicyclo [3.2.0]hentan-7-one(12)
To a solution of (3RS, 5RS)-3-[N-(Formyloxyacetyl)aminomethyl]-4-oxa-1-azabicyclo[3.2.0]heptan-7-one(55mg) in a mixture of
Methanol(1ml) and water (0.1ml), Sodium hydrogenecatbonate (20mg) was added and stirred at room temperature for 10 minutes.
Reaction mixture was loaded directly on flash column and eluted with Ethyl acetate + Acetone (1:2). The title compound was obtained as solid. Yield:69%
m.p. :103-105°C
1H NMR(CDCl3, δ) :2.54 (1H, t, J=5.1), 2.70 ( 1H, dd, J=7.4 , 12.2), 3.31 (1H, dd, J=2.2, 15.9), 3.44 (1H, dd, J=7.8, 14.2), 3.60 (1H, ddd, J=3.8, 5.3, 14.2) ,3.98 (1H, dd, J= 6.5,11.8), 4.16 (2H, d, J=5.1), 4.35-4.47 (1H, m), 5.35 (1H, d, J=2.6), 6.80 (1H, br.s).
IR(Nujol, cm-1) : 3330, 1769, 1650, 1531.
Example 13
( 3RS , 5RS ) -3 - [N- ( 6-Bromohexanoyl ) aminomethyl ]-4 -oxa- 1-azabicyclo [3.2.0]heptan-7-one (13)
According to the same method as desribed m example 1, the title compound was obtained as oil.
Yield: 50%
1H NMR(CDCl3,δ) : 1.50-2.40 (8H, m), 2.67 (1H, dd, J=6.9, 11.7), 2.85
(1H, d, J=16.1), 3.38-3.76(5H, m), 2.96 (1H, dd, J=6.4, 11.8), 4.43-4.56 (1H, m), 5.33(1H, d,J=2.6), 5.80-5.93 (1H, m).
IR(Neat, cm-1) :3310, 1772, 1639.
Example 14 (3RS, 5RS)-3-[N-(6-Formyloxyhexanoyl)aminomethyl]-4-oxa-1-azabicyclo[3,2,0]heptan-7-one (14)
According to the same method as desribed in example 11, the title compound was obtained as solid.
Yield:25%.
m.p. :61.5-63°C
1H NMR(CDCl3,δ) : 1.37-1.81 (6H, m), 2.22 (2H, t, J=7.5), 2.67 (1H, dd,
J=7.0,11.7), 2.85(1H, d,J=16.2), 3.28-3.65 (3H, m), 3.96(1H, dd,
J=6.4,11.8), 4.17(2H,t,J=6.6), 4.32-4.42 (1H, m), 5.32 (1H, d, J=2.6), 5.74(1H br.s), 8.06(1H,s). IR(Nujol, cm-1) :3315, 1763, 1715
Example 15
(3RS, 5RS)-3-[N-(6-Azidohexanoyl)aminomethyl]-4-oxa-1-azabicyclo [3.2.0]heptan-7-one (15)
According to the same method as desribed in example 9, the title compound was obtained as oil.
Yield: 70%.
1H NMR(CDCl3, δ) : 1.33-2.30 (7H, m), 2.62-2.72 (1H, dd, J=6.7, 11.7), 2.84
(1H, d,J=16.0), 3.22-3.65(5H, m), 5.92 (1H, dd, J=6.5.11.8), 4.30-4.45 (1H, m), 5.32(1H, d,J=2.6), 5.73-5.85 (1H, m).
IR (Neat, cm-1) : 3310, 2935, 1772, 1629.
Example 16
(3RS, 5RS)-3-[N-[(1,2,3-Triazol-1-yl)hexanoyl]aminomethyl]-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (16)
According to the same method as desribed in example 10, the title compound was obtained as solid.
Yield:37%
m.p. :108-109°C
1H NMR(CDCl3,δ) : 1.24-2.04 ( 6H, m), 2.21 (2H, t, J=7.3), 2.65 (1H, dd, J=7.2,
11.9),2.83(1H, d,J=16.3), 3.24-3.61 (3H, m), 3.94 (1H, dd,J=6.4, 11.8), 4.30-4.46 (3H, m) , 5.31 (1H, d,J=2.6), 5.74-5.67 (1H, m), 7.55(1H,s), 7.71 (1H,s).
IR(Nujol,cm-1) : 3315, 2945, 1783, 1715. Example 17
(3RS, 5RS)-3-[N-(6-Acetylaminohexanoyl)aminomethyl]-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (17)
According to the same method as described in example 10, the title compound was obtained as solid.
Yield: 10%
m.p. :117-118°C
1H NMR(CDCl3, δ) : 1.33-1.76 (6H, m), 1.97 (3H, s), 2.21 (2H, t, J=7.2), 2.68
(1H, dd J=7.0,11.9), 2.86 (1H, d, J=16.3), 3.21-3.66 (5H, m),3.98(1H, dd, J=6.4,11.8), 4.30-4.43 (1H, m), 5.32 (1H, d, J=2.7), 5.52-5.65 (1H, m), 5.78-5.92(1H, m).
IR(Nujol, cm-1) :3275, 1776, 1634.
Example 18
Sodium {N-[(3RS, 5RS)-7-oxc-1-aza-4-oxabicyclo[3.2.0]hept-3-yl] methylamino} succinate (18)
The protected compound obtained in reference example 3 was
dissolved in a mixture of Ethyl acetate and Dichloromethane (1:1, 4ml) and Sodium 2-ethylhexanoate (0.30ml), Triphenylphosphine
(13mg), and Tetrakis (triphenylphosphine) palladium (0) (22mg) were added. The reaction mixture was stirred at room temperature for 2hrs and solid was collected by suction. Solid was washed with Acetonitrile and dried. 65mg of the title compound was
obtained as white solid.
Yield:46%
m.p. :100°C(dec.).
1H NMR(DMSO-d6,δ) : 2.08-2.25 (4H, m), 2.61-2.81 (2H, m), 3.11-3.36 (3H, m),
3.76(1H, dd, J=6.6,11.5), 4.27-4.33 (1H, m), 5.33 (1H, d, J=2.5), 8.86-8.98
(1H, m).
IR(Nujol, cm-1):3330,1781,1651 Example 19
(3R5, 5RS)-3-[N-(4-Pentenoyl)aminomethyl]-4-oxa-1-azabicyclo[3.2.0]heotan-7-one (19)
600mg of (3RS, 5RS)-3-Azidomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one was hydrogenated with 1.0g of 10% Palladium on activated carbon in Ethyl acetate at 50psi for lhr. After removal of catalyst by filtration, 360mg (3.6mmol) of 4-Pentenoic acid and 300mg (1.8mmol) of 1,3-Dicyclohexyl carbcdiimide were added under ice-cooling. The reaction mixture was then stirred at room temperature for 2hrs. Resulted solid was filtered off and the filtrate was concentrated in vacuo. The residue was purified by flash silicagel column using Hexane-Ethyl acetate (1:1) as eluent and the title compound was obtained as oil.
Yield: 15%.
1H NMR(CDCl3, δ) : 2.25-2.48 (4H, m), 2.66 (1H, dd, J=7.5, 11.7), 2.84 (1H, d,
J=16.0), 3.25-3.43 (2H, m), 3.48-3.64 (1H, m), 3.97 (1H, dd, J=6.5, 11.8), 4.31-4.44 (1H, m), 4.98-5.14 (2H, m), 5.33 (1H, d, J=2.6), 5.75-5.92 (2H, m). IR(Neat,cm-1) :3275, 1776, 1634.
Example 20
(3RS, 5RS)-3-[N-Propynoylaminomethyl]-4-oxa-1-azabicyclo[3.2.0] heotan-7-one (20)
According to the same method as described in example 19, the title compound was obtained as solid.
Yield:29%.
m.p. :76.5-78°C.
1H NMR(CDCl3, δ) : 2.68 (1H, dd, J=5.3, 10.0), 2.67 (1H, s), 2.88 (1H, d,
J=10.5), 3.33(1H, d, J=11.1), 3.63 (1H, ddd, J=2.6, 4.7, 10.0), 3.99(1H, dd, J=4.7, 7.9), 4.36-4.44 (1H, m), 5.35 (1H, d, J=2.1), 6.20 (1H, br. s).
IRjNujol, cm-1) : 3270, 2115, 1782, 1657. Example 21
(3RS, 5RS)-3-[N-(Benzyloxycarbonyl)aminomethyl]-4-oxa-1-azabicyclo[3.2.0]hentan-7-one (21)
According to the same method as described in example 1, the title compound was obtained as oil.
Yield: 54%
1H NMR(CDCl3, δ) : 2.70 (1H, dd, J=6.6, 12.3), 2.66 (1H, d, J=16.6), 3.22-
3.55(1H, m), 3.96(1H, dd, J=5.1, 11.5), 4.31-4.47 (1H, m), 5.06 (1H, br. s), 5.10(2H, s), 5.31(1H, d, J=2.6).
Example 22
(3RS, 5RS)-3-aminomethyl-4-oxa-l-azabicyclo[[3.2.0]heotan-7-one hvdrochloride (22)
890mg of (3RS, 5RS)-3-Azidomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one was hydrogenated as described in example 1. After removal of catalyst by filtration, 5ml cf 1N-HCl was added at -78°C.
Water layer was then separated ana lyophiiized. The title compound was obtained as pale yellow solid.
Yield:73%
1H NMR(CDCl3,δ) : 2.78-2.86 (1H, m), 2.82 (1H, d, J=15.6), 2.98 (1H, d, J=
6.12),3.99(1H, d, J=15.6), 3.87 (1H, dd, J=6.7, 11.7), 4.54-4.57 (1H, m), 5.38(1H, dd, J= 2.6), 8.38 (2H,br.s).
IR(Nujol,cm-1) : 3325, 1806, 1775.
Example 23
(3RS, 5RS)-3-(N-Benzoylaminomethyl)-4-oxa-1-azabicyclo[3.2.0] heotan-7-one (23)
According to the same method as described in example 1, the title compound was obtained as solid. Yield:53%
m.p. :115-116°C
1H NMR(CDCl3,δ) : 2.76 (1H, dd, J=7.3, 11.6), 2. Sc (1H, d,J=16.7), 3.31 (1H, dd, J= 2.9,16.8), 3.49-3.62 (1H, m), 2.78 (1H, ddd, J=2.5, 6.4, 14.2), 4.02 (1H, dd, J= 6.4,11.8), 4.42-4.55 (1H, m), 5.36 (1H, d,J=2.7), 6.46(1H, br.s), 7.40-7.57 (3H, m),7.76-7.61 (2H, m).
IR(Nujol,cm-1) :3335,1779,1639,1534.
Anal. :
calcd: C, 62.40; H, 5.72; N, 11.35
Found: C, 62.39; H, 5.69; N, 11.25
Example 24
(3RS, 5RS)-3-[N-(4-Hydroxybenzoyl)aminomethyl]-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (24)
According to the same method as described in example 19 , the title compound was obtained as oil.
Yield:25%
1H NMR(CDCl3,δ) : 2.76 (1H, dd, J=6.2, 11.5), 2.79 (1H, d,J=16.3), 3.29- 3.55 (3H, m), 3.80 (1H, dd, J=6.6, 11.5), 4.41-4.47 (1H, m), 5.33 (1H, d, J= 2.5), 6.79(2H, d, J=8.7), 7.72 (2H, d, J=8.7), 8.37 (1H, br. s), 9.97 (1H, s). IR(Nujol, cm-1) :3315, 1765, 1600.
Example 25
(3RS, 5RS)-3-[N-(4-Methoxybenzoyl)aminomethyl]-4-oxa-1-azabicyclo [3.2.0]heptan-7-one (25)
According to the same method as described in example 1, the title compound was obtained as solid.
Yield:23%
m.p. :142.6°C 1H NMR(CDCl3,δ) : 2.75 (1H, dd, J=7.4,12.2), 2.86 (1H, d, J=16.7),3.31 (1H, dd, J= 2.9,15.9), 3.47-3.61 (1H, m), 3.76 (1H, ddd, J=3.5, 6.4, 14.3), 3.86 (3H,s), 4.01(1, dd, J=6.5, 11.9), 4.42-4.54 (1H, m), 5.25 (1H, d, J=2.7), 6.35 (1H, br. s), 6.94 (2H, d, J=6.8), 7.75 (2H, d, J=8.9).
IR(Nujol,cm-1) : 3290, 1774, 1625.
Example 26
(3RS, 5RS)-3-[N-(3,4-Dimethoxybenzoyl)aminomethyl]-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (26)
According to the same method as described in example 1, the title compound was obtained as solid.
Yield:45%
m.p. :170-190°C(dec.).
1H NMR(CDCl3, δ) : 2.76 (1H, dd, J=7. C, 11.8), 2.69 (1H, d,J=9.1), 2.32 (1H, dd, J=2.4, 16,5), 3.52-3.81 (2H, m), 3.93 (3H,s),3.94 (3H,s), 4.02 (1H, dd, J=6.5,11.9), 4.46- 4.51(1H, m), 5.36 (1H, d, J=2.6), 6.38 (1H,br. s), 6.87 (1H, d,J=8.3), 7.26-7.31(1H, m), 7.43 (1H, d, J=2.0).
IR(Nujol,cm-1) : 3370, 2850, 1794, 1774
Example 27
(3RS, 5RS)-3-[N-(4-Fluorobenzoyl)aminomethyl]-4-oxa-1-azabicyclo [3.2.0]heptan-7-one (27)
According to the same method as describec in example 1, the title compound was obtained as oil.
Yield: 16%
1H NMR(CDCl3,δ) : 2.67 (1H, dd, J=6.9, 11.7), 2.76 (1H, d,J=16.6), 3.23(1H, dd, J=2.8, 16.6), 3.39-3.52 (2H, m), 3.67 (1H, ddd, J=3.7, 6.3, 14.3), 3.93 (1H, dd, J= 6.5,11.9), 4.35-4.46 (1H, m), 5.28 (1H, d, J=2.6), 6.56(1H, br.s), 7.00-7.08 (2H, m), 7.69 (2H, m).
IR(Nujol, cm-1) :3345,2965,1783 Example 28
(3RS, 5RS)-3-[N-(2,5-Difluorobenzoyl)aminomethyl]-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (26)
According to the same method as described in example 1, the title compound was obtained as solid.
Yield:43%
m.p. :88.8-90.7°C
1H NMR(CDCl3,δ) : 2.76 ( 1H, dd, J=7.1, 11.8), 2.67 (1H, d,J=16.4), 3.32(1H, dd,J=2.6,16.3), 3.57-3.80 (2H, m), 4.02 (1H, dd, J=6.5, 11.8), 4.44-4.56 (1H, m) , 5.38(1H, d, J=2.6), 7.06-7.20 (3H, m), 7.42 (1H, m).
IR(Nujol, cm-1) :3340, 2935, 1776
Anal.:
calcd: C, 55.30; H, 4.29; N, 9.93
Found: C, 55.05; H, 4.18; N, 9.74
Example 29
(3RS, 5RS)-3-[N-(2,4,5-Trifluorobenzoyl)aminomethyl]-4-oxa-1-azabicyclo[3.2.0]heotan-7-one (29)
According to the same method as described in example 1, the title compound was obtained as solid.
Yield:45%
m.p. :76.5-78.1°C
1H NMR(CDCl3,δ) : 2.74 (1H, dd, J=7.1, 11.8), 2.87 (1H, d, J=16.3), 3.33(1H, d, J=16.4), 3.57-3.72(2H, m), 4.02 (1H, dd, J=6.5, 11.8), 4.67-4.52(1H, m), 5.38 (1H,s), 6.96-7.09(2H, m), 7.89-8.02 (1H, m).
IR(Nujol, cm-1) :3300, 2960, 1786
Anal. :
calcd: C, 52.01; H, 3.69; N, 9.33
Found: C, 51.79; H, 3.49; N, 9.15 Example 30
(3RS, 5RS)-3-[N-(4-Cyanobenzoyl)aminomethyl]-4-oxa-1-azabicyclo
[3,2,0]hentan-7-one (30)
According to the same method as described in example 1, the title compound was obtained as solid.
Yield:45%
m.p. :130-170°C(dec.).
1H NMR(CDCl3, δ) : 2.74 (1H, dd, J=6.9, 11.8), 2.66 (1H, d,J=16.5), 3.26(1H, dd,J=2.9,16.7), 3.46-3.60(1H, m), 3.80 (1H, ddd, J=3.5, 6.4 , 14.2), 4.03 ( 1H, dd, J=6 .4 , 11 . 8 ) , 4 .43 -4 . 55 ( 1H, m) , 5 .37 ( 1H, d , J=2 . 6 ) , 6 . 65 ( 1H, br.s), 7.75(2H, d, J=8.5), 7.90 (2H, d, J=8.5).
IR(Nujol,cm-1) : 3360, 2235, 1795, 1774
Example 31
(3RS, 5RS)-3-[N-(Thiophen-2-yl)acetylaminomethyl]-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (31)
500mg (3.0mmol) of (3RS, 5RS)-3-Azidomethyl-4-oxa-1-azabicyclo
[3.2.0]heptan-7-one was hydrogenated as usual manner. The solution was filtered through celite and to the filtrate 0.8ml of
Triethylamine was added. Under cooling, Thiophen-2-yl-acetyl chloride, prepared from 1.0g of Thiophen-2-yl-acetic acid, was slowly added to it and the mixture was stirred at room temperature for 1 hr. The solution was filtered through silica gel column and the title compound was obtained as oil.
Yield: 18%.
1H NMR(CDCl3,δ) :2.63 (1H, dd, J=7.26), 2.80 (1H, d,J=16.2), 3.26(1H, dd,
J=2.3,16.0), 3.40-3.48 (2H, m), 3.81 (2H, s), 2.92 (1H, dd, J=6.5, 11.9), 4.28-4.40 (1H, m), 5.16 (1H, d, J=2.6), 5 . 88 (1H, br.s), 6.93-7.04
(2H, m), 7.23-7.30(1H, m).
IR(Nujo1,cm-1) :3310, 1767, 1644. Example 32
(3RS, 5RS)-3-[N-[(Pyridin-3-yl)carbonyl]aminomethyl]-4-oxa-1-azabicyclo[3.2.0]heotan-7-one (32)
According to the same method as described in example 19, the title compound was obtained as oil.
Yield:7%.
1H NMR(CDCl3,δ) : 2.75 (1H, dd, J=6.9, 11.8), 2.88 (1H, d, J=16.2), 3.34
(1H, dd, J=2.2,16.0), 3.46-3.63 (1H, m), 3.82 (1H, ddd, J=3.4, 6.4, 14.3), 4.04 (1H, dd, J=6.4,11.9), 4.44-4.56 (1H, m), 5.38 (1H, d, J=2.7), 6.54 (1H,br.s), 7.43 (1H, dd, J=4.8, 7.7), 8.15 (1H, dt, J=2.2, 7.8), 8.78
(1H, dd,J=1.6,4.9), 9.00(1H, d, J=1.8).
Example 33
(3RS, 5RS)-3-[N-(N,N-Diethylcarbamyl)]aminomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (33)
According to the same method as described in example 1, the title compound was obtained as oil.
Yield:31%
1H NMR(CDCl3,δ) : 1.13 (6H, t, J=7.2), 2.72 (1H, dd, J=7.2, 12.0), 2.84 (1H, dd,J= 16.0), 3.21-3.34(3H, m), 3, 54 (1H, ddd, J=3.6, 6.3, 1.3), 3.95(1H, dd,J=6.5,11.8), 4.34-4.46(1H, m), 4.46 (1H, br. s), 5.31 (1H, d, J=2.7). IR(Neat, cm-1) :3355, 1780,1629.
Example 34
N,N'-Di-{[(3RS,5RS)-7-oxo-1-aza-4-oxabicyclo[3.2.0]hept-3- yl]methyl}urea (34)
A solution of 340mg(2.0mmol) of (3RS, 5RS)-3-Azidomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one in 30ml of Ethyl acetate was hydrogenated under 45psi with 150 mg of 10% Palladium on activated carbon. The reaction mixture was filtered through celite and concentrated to 15ml at cool temperature. At this point, Phosgene (20% in Toluene, 260mg, 2 mmol) was added dropwise while the pH of the mixture was kept at 7 by adding cf a saturated solution of K2CO3. The reaction mixture was extracted with Ethyl acetate (3 × 20ml) and the combined organic layer was dried over MgSO4 and concentrated. Crystallization of the yellow residue in Ethyl acetate gave product as a white prisms.
Yield:42%
m.p.: >300°C(dec.)
1H NMR (DMSO-d6,δ) : 2.64 (2H, dd, J=6.4, 11.5), 2.77 (2H, d, J=16.3), 3.18
(4H, t, J=5.4), 3.33(2H, dd,J=2.7, 16.2), 4.22-4.34 (2H, m), 5.30 (2H, d, J=2.6), 6.15(2H, br.t, J=5.8).
IR(Nujol,cm-1) :3320,1770.
Example 35
(3RS, 5RS)-3-(N-Methanesulfonylaminomethyl)-4-oxa-1-azabicyclo
[3.2.0]heptan-7-one (35)
According to the same method as described in example 1, the title compound was obtained as solia.
Yield:23%
m. p . : 115-190°C ( gradually dec ) .
1H NMR (CDCl3 , δ) : 2 . 82 ( 1H, dd, J=7 . 5 , 11 . 8 ) , 2 . 87 ( 1H, d, J=16 . 8 ) , 3 . 01
(3H,s), 3.22-3.67 (3H, m), 4.00 (1H, dd, J=6.4, 11.9), 4.35-4.49 (1H, m), 4.58 (1H, br.s), 5.35(1H, d, J=2.8).
IR(Nujol, cm-1) :3235, 1783, 1302.
Example 36
(3RS, 5RS)-3-[N-(4-Toluenesulfonyl)aminomethyl]-4-oxa-1-azabicyclo [3.2,0]heptan-7-one (36)
According to the same method as described in example 1, the title compound was obtained as solid.
Yield:74% m.p. :123-125°C
1H NMR(CDCl3, δ) :2.44(3H,s),2.74(1H, dd,J=11.6,7.4),2.81(1H, d,J=
15.8), 2.97-3.21 (2H, m), 3.28 (1H, dd, J=2.2, 15.9), 3.01(1H, dd, J=11.9, 17.3), 4.26-4.38 (1H, m), 4.75 (1H, br.t, J=6.3), 5. 2 8 (1H, d,J=2.6), 7.33 (2H, d,J=8.1), 7.74(2H, d,J=5.3).
IR(Nujol, cm-1) :3275, 1778, 1153.
Example 27
(3RS, 5RS)-3-[N-(4-Chlorobenzenesulfonyl)aminomethyl]-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (37)
According to the same method as described in example 1, the title compound was obtained as solid.
Yield:35%
m.p. :101-103°C
1H NMR(CDCl3, δ) : 2.78 (1H, dd, J=7.4, 11.6), 2.62 (1H, d,J=15.9), 2.99- 3.23 (2H, m), 3.29 (1H, dd, J=6.5, 11.9), 4.28-4.40 (1H, m), 4.89 (1H, br.t, J=6.4), 5.27(1H, d, J=2.7), 7.51 (2K, d, J=8.7), 7.80 (2H, d, J=8.7).
IR(Nujol, cm-1) : 3275, 1764, 1320, 1153.
Example 38
(3RS, 5RS)-3-N-(4-Methoxybenzenesulfonyl)aminomethyl-4-oxa-1- azabicyclo[3.2.0]heotan-7-one (38)
According to the same method as described in example 1, the title compound was obtained as solid.
Yield: 66%
m.p. : 116.5-118.5°C
1H NMR(CDCl3,δ) :2.79 (1H, dd, J=5.2, 7.3), 2.80 (1H, d,J=16.0), 2.96-3.21
(3H, m), 3.27(1H, dd, J=2.5,16.7), 3.88 (3H, s), 3.92 (1H, dd, J=5.4, 6.5),
4.24-4.38 (1H, m), 4.89 (1H, br.t, J=6.4), 5.26 (1H, d, J=2.6), 6.99 (2H, d, J=
8.9), 7.79(2H, d, J=8.9).
IR(Nujol, cm-1) : 3265, 1770, 1578, 1489. Example 39
(3RS , 5SR)-3-(Aminoacetyl)oxymethyl-4-oxa-1-azabicyclo[3.2.0] heotan-7-one hydrochloride (39)
Azidoacetate (390mg) obtained in example 9, 5% Palladium on activated carbon(390mg) were shaken in Ethanol-Ethyl acetate (10ml each) at 50psi for 1hr. After the reaction, catalyst was removed by filtration and 1.5ml of 1N-HCl was added under cooling
condition. Reaction mixture was purified on HP-20 column by elution with water. The title compound was obtained after
lyophylization as solid.
Yield:46%
m.p. :85-110°C(dec.).
1H NMR (DMSO-d6,δ) :2.76-2.88(1H, m), 2.80 (1H.d, J=16.3), 2.98 (1H, d, J=
9.4), 3.83-4.28 (6H, m), 4.57-4.83 (1H, m), 5.36 (1H, d,J=2.5), 7.66(1H, br.s), 8.43 (2H,br.s).
IR(Nujol, cm-1) :3205, 1751, 1651.
Example 40
(3RS, 5SR)-3-[N-(N-Benzyloxycarbonylaminoacetyl)aminoacetyl]oxymethyl-4-oxa-1-azabicyclo[3.2.0]hentan-7-one (40A) and
(3RS, 5SR)-3-[N-(Aminoacetyl)aminoacetyl]oxymethyl-4-oxa-1-azabicyclo[3.2.0]heotan-7-one hydrochloride (40B)
a mixture of (3RS, 5SR)-3-Bromomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (2.0g, 9.71mmol), N-(benzyloxycarbonylaminoacetyl) aminoacetic acid (2.6g, 11.6mmol) and Cesium carbonate (3.8g, 11.6mmol) in Hexamethylphosphoric triamide (15ml) was stirred at 65-70°C for 2hrs. Resulting mixture was poured onto ice-water and extracted with Ethyl acetate. The extract was washed with water, brine and dried over Magnesium sulfate. Solvent was removed in vacuo and the residue was purified on a silica gel column chromatography using ethyl acetate-acetone (9:1) as the eluent gave an off-white solid (40A). Yield:3.0g (79%).
1H NMR (DMSO-d6,δ) : 2.70-2.55 (2H, m), 3.30 (1H, dd, J=16.1, 2.4), 3.62-4.20
(7H, m),4.48-4.62(1H, m) , 5.11(2H,s) , 5.32 (1H, d, J=2.5), 7.35(5H,s),7.55
(1H,t,J=5.7), 8.35(1H,t, J=5.7).
IR(Nujol,cm-1) :3461, 3405, 1781, 1750, 1722, 1636.
N-(benzyloxycarbonylaminoacetyl)aminoacetoxy derivative, obtained above (1.1g, 2.81mmol) and Palladium on activated carbon (10%, 53.8% moist, 0.8 g) in Methanol (140ml) was shaken at 50psi for 1hr under Hydrogen atmosphere. After the reaction, catalyst was filtered off using celite pad. The filtrate was concentrated in vacuo and the residue was re-dissolved in Ethyl acetate.
Acidification (1N HCl 2.4ml, water 26ml) and followed by freezedrying gave a solid (40B).
Yield: 660mg(80%).
1H NMR(DMSO-d6,δ) : 2.62-2.76 (2H, m), 3.10-4.14 (8H, m), 4.44-4.55(1H, m),
5 . 27 ( 1H, d , J=2 . 5Hz ) , 8 . 23 ( 3H . br . s ) , 8 . 94 ( 1H , t , J=5 . 7 ) .
IR (Nujol , cm-1 ) : 3125 , 1774 , 1748 , 1682 , 1618 .
Example 41
(3RS, 5SR)-3-[N-(L-2-N-Benzyloxycarbonylaminopropanoyl)aminoacetyl]oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (41A) and (3RS, 5SR)-3-[N-(L-2-Aminopropanoyl)aminoacetyl]oxymethyl-4-oxa-1-azabicyclo [3.2.0]heptan-7-one hydrochloride (41B)
A solution of (3RS,5SR)-3-[N-(Benzyloxycarbonyl)aminoacetyl] oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (1.0g,2.99mmol) in Ethyl acetate (80ml) was hydrogenolysed at 50psi for 15 hr using Palladium on activated carbon (10%, 53.8% moist, 0.75g). The mixture was filtered through a pad of celite and cooled in an ice-bath. 1,3-Dicyclohexyl carbodiimide (740mg, 3.56mmol) was added to an ice-cold solution of N-Benzyloxycarbonyl-L-2-aminopropanoic acid (1.33g, 5.98mmol) in Ethyl acetate (80ml) and the mixture was stirred for 1 hr. The N-Benzyloxycarbonyl-L-2-aminopropanoic acid-DCC complex was added to the ice-cold Ethyl acetate solution of the amine prepared above. The mixture was stirred at room temperature overnight. The precipitated urea was filtered off, the filtrate was concentrated and passed through a silica gel column using Ethyl acetate as the eluent to give a thick oil (41A).
Yield: 83%
1H NMR(CDCl3,δ) : 1.40 (3H, d, J=7.1 ),2.74-2.88(2H, m),3.29 (1H, dd, J=16.4,
2.7), 3.93-4.60(6H, m), 5.11(2H, m), 5.29-5.41(2H, m), 5.35 (1H,br. s), 6.74(1H, br.s), 7.34(5H,s).
(N-protected aminopropanoyl) aminoacetyl ester derivative was deprotected as same manner described in example 40 and the title compound (41B) was obtained as solid.
Yield:720mg(63%).
1H NMR(DMSO-d6, δ) :1.41(3H, d,J=6.9), 2.75-2.83 (2H, m), 3.31(1H), 3.81- 4.24 (6H, m), 4.55 (1H, m), 5.34 (1H, d, J=2.4), 8.39 (3H,br.s), 9.12 (1H,br.s) IR(Nujol, cm-1) :3345, 3195, 1770, 1746, 1681.
Example 42
(3RS, 5SR)-3-[N-(L-2-N-Benzyloxycarbonylamino-3-methylbutyryl) aminoacetyl]oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (42A) and (3RS, 5SR)-3-[N-(L-2-Amino-3-methylbutyryl)aminoacetyl]
oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one hydrochloride (42B) According to the same manner described as in example 40, L-(2-N-benzyloxycarbonylamino-3-methylbutyl)aminoacetic acid was coupled with (3RS, 5SR)-3-Bromomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one and N-protected title compound (42A) was obtained as off-white solid.
Yield: 83%
m.p. :143-145°C.
1H NMR(CDCl3,δ) : 0.94 (3H, d,J=6.8), 0.98 (3H, d,J=6.8), 2.09-2.25 (1H, m),
2.73-2.88 (2H, m), 3.29 (1H, dd,J=16.3, 2.4), 3.93-4.31 (7H, m), 4.48-4.59 (1H, m) , 5.11 (2H,s) , 5.32-5.40 (2H, m), 6.58 (1H,br.t), 7.34 (5H,s). IR(Nujol, cm-1) : 3295, 1793, 1750, 1687, 1647, 1619.
The benzyloxycarbonyl group was hydrogenciysed according to the same manner described as in example 40, the title compound (42B) was obtained as solid.
Yield: 64%
1H NMR(DMSO-d6,δ) : 0.91 ( 6H, d, J=6.8), 2.02-2.12 (1H, m), 2.66-2.76 (2H, m),
3.29(1H, dd, J=16.1,2.6), 3.62-4.17 (6H, m), 4.40-4.55 (1H, m), 5.26 (1H, d, J=2.5), 8.25(3H, br.s), 9.0 (1H, br. t).
IRmujol,cm-1) : 3195, 1776, 1750, 1677, 1621.
Example 43
(3RS, 5RS)-3-N-(Aminoacetyl)aminomethyl-4-oxa-1-azabicyclo[3.2.0] heptan-7-one hydrochloride (43 )
Azidoacetamide compound, obtained in reference example 9 (890mg), was hydrogenated in presence of 5% Palladium on activated
carbon(800mg) in Ethanol (20ml) at 50psi fcr 2hr. After removal of catalyst by filtration, 3.0ml of 1N-HCl was added under cooling condition and solvent was removed in vacuo. The residue was purified on HP-20 column using water as eluent and the title compound was obtained after lyophilization as yellow solid(43). Yield: 62%
1H NMR(CDCl3,δ) : 2.70 (1H, dd, J=6.5, 11, 6), 2.79 (1H, d,J=16.4), 3.19- 3.44(3H, m), 3.56 (2H,s), 3.82 (1H, dd, J=6.5, 11.6), 4.27-4.39 (1H, m), 5.34 (1H, d,J=2.6), 8.21(2H,br.s), 8.72 (1H,br. t, J=5.6).
IR(Nujol,cm-1) :3255,1768
Example 44
( 3RS , 5RS ) -3 -N- (N-Acetylaminoacetyl ) aminomethyl-4-oxa-1-azabicyclo [ 3 . 2 . 0 ] heptan-7 -one ( 44 ) Acetic anhydride (17ml) was added dropwise at 5°C to a mixture of N-(aminoacetyl) aminomethyl amido derivative which was obtained in example 45(20mg) and Triethylamine (17mg) in Dichloromethane (1ml). The mixture was stirred under same condition for 30 minutes. The reaction mixture was purified by silicagel column chromatography using Acetone as eluent and title compound (44) was obtained as white solid.
Yield: 44%
m.p.142-144°C
1H NMR(CDCl3,δ) : 1.85 (3H, s), 2.66 (1H, dd, J=6.4, 11.5), 2.78 (1H, d, J=
16.3), 3.14-3.38 (3H, m), 3.65 (2H, d,J=10.2), 3.77 (1H, dd, J=6.6, 11.6), 4.24-4.36 (1H, m), 5.30 (1H, d, J=2.6), 7.99-8.06 (2H, m).
IR(Nujol,cm-1) : 3280, 3095, 1800, 1636
Example 45
(3RS, 5RS)-3-[N-(L-2-N-Benzyloxycarbonylamino-3-methylbutyryl)aminoacetyl]aminomethyl-4-oxa-1-azabicyclo[3.2.0]heotan-7-one (45A) and (3RS,5RS)-3-[N-(L-2-amino-3-methylbutyryl)aminoacetyl]-aminomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one
hydrochloride (45B)
According to the same manner as described in example 41, N-protected title compound (45A) was obtained as solid.
Yield:23%
3-H NMR (DMSO-d6,δ) :0.79(6H, m), 1.84-1.94 (1H, m), 2.54-2.74 (2H, m),3.15-
3.29 (5H, m), 3.62-3.80(3H, m), 4.19-4.25 (1H, m), 4.96 (2H, s), 5.23 (1H, d, J=2.6), 7.29 (5H,s), 7.82 (1H,br.t), 8.15 (1H, br.s).
N-protected amide derivative, obtained as above, was deprotected as same manner described in example 43 and the title compound (45B) was obtained as solid.
Yield:0.40g(70%).
3-H NMR(DMSO-d6,δ) :0.80(6H, m), 1.94-2.10 (1H, m), 2.60-2.74 (2H, m), 3.05- 3.35(5H,m) , 3.50-3.80 (3H, m) , 5.25 ( 1H, d, J=2.6) , 8.35 (3H, br.s) , 8.80 (1H, br.s) .
IR (Nujol, cm-1) : 3195, 1782, 1718, 1678, 1653, 1603.
Example 46
(3RS, 5RS)-3-N-[N-(L-2-N-Benzyloxycarbonylamino-3-carboxypropanoyl)aminoacetyl]aminomethyl-4-oxa-1-azabicyclo [3.2.0]heptan-7-one
(46A) and (3RS,5RS)-3-N-[N-(L-2-Amino-3-carboxypropanoyl)
aminoacetyl]aminomethyl-4-oxa-1-azabicyclo[3.2.0]heotan-7-one (46B)
Azidoacetamide derivative of clavam compound, obtained in example 43, was coupled with protected aspartic acid derivative using similar method described in example 41 and the protected title compound was obtained (46A).
Yield:42%.
1H NMR(CDCl3,δ) : 2.62-2.88 (2H, m), 2.76 (1H, d,J=16.6), 3.10-3.25 (2H, m),
3.34-3.42 (2H, m), 3.77-4.17 (3H, m), 4.30-4.40 (1H, m), 4.53-4.63 (1H, m), 5.13 (4H,s), 5.28(1H, t,J=3.1), 5.75-5.82 ( 1H, m), 6.67-6.75 (1H, m), 6.94- 7.03 (1H, m), 7.30-7.38(10H, m).
0.5g of the protected compound and 0.5g of 5% Palladium on activated carbon in 10 ml Methanol was stirred under Hydrogen atmosphere at normal pressure for 2.5hrs. Later the catalyst was filtered through celite and filtrate was concentrated.
Acetonitrile was added to the residue and solid was collected by filtration(46B) .
Yield:34%.
m.p. :200°C(dec.).
1H NMR(CDCl3,δ) : 2.64-2.69 (1H, m), 2.77 (1H, d, J=16.2), 3.08-3.85 (6H, m),
3.32(1H, d,J=13.4), 4.25-4.38 (1H, m), 5.30 (1H, d, J=2.4), 8.25-8.56
(2H, m) .
IR (Nujol, cm-1) :3290,1773. Example 47
(3RS, 5RS)-3-N-[N-(D-4-N-benzylcxycarbonylamino-4-benzyloxy- carbonylbutyryl)aminoacetyl]aminomethyl-4-oxa-1-azabicyclo-
[3.2.0]heptan-7-one (47A) and (3RS,5RS)-3-X-[N-(D-4-Amino-4-carboxybutyryl)aminoacetyl]aminomethyl-4-oxa-1- -azabicyclo-
[ 3 . 2 . 0 ] heptan-7 -one ( 47B )
(3RS, 5RS)-3-[N-(Azidoacetyl)aminomethyl]-4-oxa-1-azabicyclo
[3.2.0]heptan-7-one, obtained in example 43, was coupled with [4-(Benzyloxycarbonylamino)-4-benzyloxycarbonyl] butyric acid using similar method described in example 41 and the protected title compound was obtained (47A).
Yield:21%.
m.p. :45°C
1H NMR(CDCl3,δ) : 1.97-2.19 (1H, m), 2.17-2.3C (1H, m), 2.40-2.50 (2H, m),
2.73(1H, dd, J=6.1,11.6), 3.25 (1H,d, J=16.2), 3.94 (1H, dd, J=6.9, 11, 6),
4.05-4.20 (4H, m), 4.40-4.55 (2H, m), 5.10 (2H, m), 5.17 (2H, m),5.30 (1H, t,
J=2.8), 5.39 (br.s), 7.35 (10H, s).
IR (Neat, cm-1) : 3355, 1784, 1739, 1525.
This protected amide derivative obtained above was deprotected by using same method as described in example 46 and the title compound (47B) was obtained as solid.
Yield: 10%.
m.p. :220°C(dec)
1H NMR(DMSO-d6, δ) : 1.90-2.04 (2H, m), 2.75 (1H, dd, J=5.9, 16.4), 2.50-2.57
(4H, m), 2.80(1H, d,J=16.4), 2.33 (1H, dd, J=2.6, 16.2), 3.84 (1H, dd, J=7.1, 11.6), 4.12(2H, d,J=3.4), 4.22-4.47 (1H, m), 5.29 (1H, d,J=2.5), 5.08-5.21 (1H, br.d).
Example 46
(3RS, 5SR)-3-(L-2-N-Benzyloxycarbonylaminopropanoyl)oxymethyl-4-oxa-1-azabicyclo[3.2.0]heotan-7-one (48A) and (3RS, 5SR)-3-(L-2- Aminopropanoyl)oxymethyl-4-oxa-1-azahicyclo[3.2 . 0]heptan-7-one hydrochloride (48B)
According to the same method described in example 40, N-protected title compound (48A) was obtained as oil.
Yield: 68%.
1H NMR(CDCl3,δ) : 1.44 (3H, d,J=7.2), 2.70-2.67 (1H, m), 2.84 (1H,d, J=
16.2),3.27(1H, d,J=16.0), 3.98 (1H, dd, J=7.1, 11.6), 4.18-4.56 (2H, m), 4.30-4.65 (2H, m) , 5.12 (2H,s) , 5.16-5.30 (1H, m), 5.32 (1H,s),7.35 (5H,s). IR (Neat, cm-1) : 3550, 1784, 1748, 1720, 1525.
The N-protected ester derivative obtained above was deprotected by catalytic hydrogenation in Methanol using 5% Palladium on activated carbon at room temperature (50psi, 1hr). After removal of catalyst, 1N-HCl (1.7ml) was added to the reaction mixture under cooling condition and resulted solution was then purified by HP-20 column chromatography using water as eluent. The title compound (48B) was obtained after lyophilization as solid.
Yield:15% 1H NMR(DMSO-d6,δ) : 1.43 (3H, d,J=7.4 ), 2.70-2.59 (1H, m), 2.80 (1H, d, J= 15.7),3.26-3.40(1H, m), 3.88 (1H, dd, J=6.7, 11.6), 4.02-4.37 (4H, m), 4.50-4.70 (1H, m) , 5.35 (1H,t,J=3.4), 8.57 (2H, br.s).
IR(Nujol, cm-1) :3400, 3275, 1746.
Example 49
(3RS, 5SR)-3-[L-2-N-(L-2-N-Benzyloxycarbonylamino-3-methylbutyryl) aminopropanoyl]oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (49A) and (3RS, 5SR) -3- [L-2-N- (L-2-Amino-2-methylbutyryl) amino propanoyl]oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one hydrochloride ( 49B)
According to the same method as descried in example 41, protected title comoound(49A) was obtained as an off-white solid. Yield: 65%
m.p. :167-169°C.
1H NMR (CDCl3,δ) :0.93(3H, d, J=6.8),C.98(3H, d,J=6.S),1.35(3H, d, J=
2.04-2.18 (1H, m),2.73-2.89 (2H, m),3.33 (1H, dd, J=16.2, 2.6 ),3.94-4.03 (2H, m),4.21-4.25 (2H, m),4.55-4.62 (2H, m) , 5.11 (2H,s) , 5.35 (2H,br.s), 6.30 (1H, d, J=7.1),7.35 (5H,s).
IR (Nujol, cm-1) :3315, 1785, 1746, 1688, 1648.
The N-protected ester derivative was deprotected as same manner described in example 40 and the title compound (49B) was obtained as solid.
Yield: 66%.
% NMR(DMSO-d6,δ) : 0.98 ( 6H, d,J=6.8), 1.35 (3K, d,J=7.2 ), 2.12-2.15 (1H, m), 2.75-2.83 (2H,m) , 3.31-3.38 (1H,m) , 3.64-4.56 (6H,m) , 5.35 (1H, d, J= 2.9), 8.30(3H,br.s) , 9.06 (1H,br .a, J=6.6) .
IR (Nujol, cm -1) : 3120, 1792, 1763, 1740, 1683, 1650.
Example 50
(3RS, 5RS)-3-N-(L-2-N-Benzyloxycarbonylaminopropanoyl)aminomethyl¬4-oxa-1-azabicyclo[3.2.0]heptan-7-one (50A) and (3RS, 5RS)-3-N-(L-2-Aminopropanoyl)aminomethyl-4-oxa-1-azabicyclo[3.2.0]heotan-7-one hydrochloride (50B)
According to the same procedure described in example 43, N-protected title compound (50A) was obtained.
Yield: 68%
1H NMR(CDCl3,δ) : 1.42 (3H, d, J=17.3 ), 2.72-2.57 (1H, m), 2.81 (1H, d, J=
16.6),3.48(1H, dd,J=3.4,16.6), 3.33-3.57 (2H, m), 3.85-4.00 (1H, m), 4.16-5.76 (2H, m), 5.12 (2H, s), 5.26-5.31 (1H, m), 6.39 (1H,br.s), 7.33 (5H,s).
IR (Neat, cm-1) : 3295, 1782, 1653, 1533. The title compound (50B) was obtained after decrctection as described in example 43, followed by salt formation.
1H NMR(DMSO-d6,δ) : 1.35 ( 3K, d, J=6.9), 2.65-2.70 (1H, m), 2.79 (1H, dd, J= 3.1,16.4), 3.10-3.50 (3H, m), 2,77-3.90 (2H, m),4.27-5.92 (1H, m) , 5.32 (1H, t, J=3.1), 8.12 ( 2H, br.s),8.66 (1H, m) .
IR(Nujol, cm-1) : 3380, 3230, 1774, 1670, 1562.
Example 51
(3RS, 5SR)-3-(D-2-N-Benzyloxycarhonylaminopropanoyl)oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (51A) and (3RS, 5SR)-3-(D-2-Aminopropanoyl)oxymethyl-4-oxa-1-azabicyclo[3.2.0]heotan-7-one hydrochloride (51B)
According to the same procedure described in example 43, N-protected title compound (51A) was obtained as oil.
Yield: 58%
1H NMR(CDCl3,δ) : 1.44 (3H, d, J=7.2), 2.20-2.56 (1H, m), 5.68 (1H, d, J=
16.3),6.54(1H, d,J=15.9), 2.97 (1H, dd, J=7. C, 11.6), 4.17-4.25 (2H, m), 4.38-4.63 (2H, m) , 5.11 (2H,s) , 5.25 (1H, br. d,J=6.4) , 5.32 (1H,s),7.35 (5H, m).
IR (Neat, cm-1) : 3355, 1704, 1748,1720, 1526.
The title compound (51B) was obtained after deprotection as described in example 43, followed by salt formation.
Yield: 18%
1H NMR(DMSO-d6,δ) : 2.87 (3H, d,J=7.4), 2.71-2.92 (2H, m),3.30-3.94
(1H, m),3.88(1H, dd, J=6.9,11.8), 3.96-4.44 (3H, m), 4.50-4.69 (1H, m), 5.35 (1H,t, J=3.5), 8.57 (1H.br. s).
IR(Nujol,cm-1): 3400, 1746, 1645.
Example 52 (3RS, 5SR)-3-{D-2-N-[D-2-N-(Thiophen-2-yl)acetylaminopropanoyl]- aminopropanoyl}oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (52)
According to the similar method as described in example 40, the title compound (52) was obtained as solid.
Yield:
m.p. :122-125°C
1H NMR(CDCl3,δ) : 1.34 (3H, d,J=7.0), 1.40 (3H, d, J=7.2), 2.80 (1H, dd, J=
6.3,17.9), 2.85(1H, d,J=15.4), 3.20 (1H, dd, J=2.6, 16.2 ), 3.78 (2H, s), 3.97 (1H, dd,J=6.7,11.6), 4.20-4.26 (2H, m), 4.47-4.55 (2H, m), 5.32-5.35 (1H,t,J=3.3) ,6.23 (1H,br.d,J=7.1), 6.67 (1H,br.d,J=7.1), 6.95-7.01 (2H, m),7.24-7.26(1H, m).
IR(CHCl3,cm-1) : 3295, 1778, 1747, 1646.
Example 53
(3RS, 5RS)-3-N-(D-2-N-Benzyloxycarbonylaminopropanoyl)aminomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one(53A) and (3RS,5RS)-3-N-(D-2-Aminopropanoyl)aminomethyl-4-oxa-1-azabicyclo[3.2.0]heotan-7-one hydrochloride (53B)
According to the same method described in example 43 , N-protected title compound (53A) was obtained as oil.
Yield: 60%
1H NMR(CDCl3,δ) : 1.42 (3H, d,J=17.3), 2.72-2.57 (1H, m), 2.81 (1H, d, J=
16.6),3.48(1H, dd,J=3.3,16.6), 3.33-3.57 (2H, m), 3.85-4.00 (1H, m), 4.16-5.76 (2H, m), 5.12 (2H, s), 5.26-5.31 (1H, m), 6.39 (1H,br.s), 7.33 (5H,s).
IR (Neat, cm-1) : 3295, 1782, 1653, 1533.
The title compound (53B) was obtained after deprotection as described in example 43, followed by salt formation.
Yield:73%
1H NMR(DMSO-d6,δ) : 1.35 (3H, d,J=6.9), 2.65-2.70 (1H, m), 2.79 ( 1H, dd, J=
3.1,16.4), 3.10-3.50(3H,m), 3, 77-2.90 (2H, m), 4.27-5.92 (1H, m), 5.32 (1H, t, J=3.1) , 8.12 (2H,br.s) , 8.65(1H, br.s) .
IR (Nujol, cm -1) : 3380, 3230, 1774, 1670, 1562.
Example 54
(3RS,5SR)-3-(L-2-N-Benzyloxycarbonylamino-3-methylbutyryl)oxymethyl-4-oxa-1-azabicyclo[3.2.0]hentan-7-one (54A) and
(3RS,5SR)-3-(L-2-Amino-3-methylbutyryl)oxymethyl-4-oxa-1-azabicyclo[3.2.0]heotan-7-one hydrochloride(54B)
According to the same procedure described in example 43, N-protected title compound (54A) was obtained as oil.
Yield:49%
1H NMR(CDCl3,δ) :0.91(3H,d,J=6.9), 0.98 (3H, d,J=6.8), 2.13-2.22 (1H, m),2.84(2H, d, J=16.3), 3.23-2.33 (1H, m), 4.0C (1H, dd,J=7.0, 11.6), 4.17- 4.33 (3H, m), 4.50-4.60(1H,m), 5.11 (2H, s), 5.20-5.26 (1H, m), 5.33 (1H, s), 7.36(5H,s).
The title compound (54B) was obtained after deprotection as described in example 43, followed by salt formation.
Yield:71%
1H NMR(DMSO-d6,δ) : 0.95-0.99 ( 6H, m), 2.16-2.22 (1H, m), 2.76-2.86
(2H, m), 3.32-3.40(1H,m), 3.84-4.32 (4H, m), 4.57-4.60 (1H, m), 5.35 (1H.d,
2.6),8.54(3H, br.s).
IR(Nujol, cm-1) :1778, 1742, 1683, 1646
Example 55
(3RS, 5SR)-3-[L-2-(N-Benzyloxycarbonylaminoacetyl)amino-3-methylbutyryl]oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (55A) and (3RS,5SR)-3-[L-2-(N-Aminoacetyl)amino-3-methylbutyryl] oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one hydrochloride (55B) According to the similar method described as in example 40, N-protected title compound (55A) was obtained as oil.
Yield:81%.
1H NMR(CDCl3,δ) :0.93(3H, d,J=6.6),0.95(3J, d,J=6.6),2.05-2.28(1H, m),
2.74-2.90 (2H, m), 3.30 (1H, dd, J=16.1, 2.4 ),2.53-4.05 (3H, m),4.12-4.35 (2H, m),4.48-4.66(2H,m), 5.11(2H,s) , 5.34-5.47(2H,br.s),6.50(1H, d, J=8.0),7.35(5H,s).
IR (Nuj ol , cm - 1 ) :3345, 1784, 1740, 1680.
The title compound (55B) was obtained after deprotection as
described in example 40, followed by salt formation.
Yield:48%.
1H NMR(DMSO-d6,δ) : 0.93 (6H, d,J=6.6), 2.04-2.14 (1H, m), 2.76-2.83 (2H, m),
3.32-3.40(1H,m), 3.63-4.31 (6H, m),4.54-4.59 (1H, m), 5.33 (1H, dd, J=7.0, 2.5),8.82(3H,br.s), 8.86 (1H br,s).
IR (Nuj ol , cm - 1 ) : 3185, 1779, 1735, 1681.
Example 55
(3RS, 5SR)-3-[L-2-N-(L-2-N-Benzyloxycarbonylamino-3-methylbutyryl) amino-3-methylbutyryl]oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (56A) and (3RS, 5SR)-3-[L-2-N-(L-2-Ammo-3-methylbutyryl)amino-3-methylbutyryl]oxymethyl-4-oxa-1-azabicyclo-[3.2.0]heptan-7-one hydrochloride ( 56B)
According to the similar methoa described in example 41, protected title compound (56A) was obtained.
Yield:77%.
1H NMR(CDCl3,δ) : 0.89-0.98 (12H, m), 2.06-2.21 (2H, m), 2.73-2.88 (2H, m),
3.29(1H, d, J=16.2), 3.93-4.25 (4H, m), 4.52-4.59 (2H, m), 5.11 (2H, s), 5.33 (1H, d, J=2.8), 5.45(1H, d, J=6.8), 6.54 (1H, d, J=8.4),7.34 (5H,s).
The title compound (56B) was obtained after deprotection as
described in example 40, followed by salt formation. Yield : 64% .
1H NMR(DMSO-d6δ) :0.94-1.00 (12H, d, J=6.7), 2.10-2.20 (2H, m), 2.71-2.84
(2H, m),3.32-3.40 (2H, m),3.80-3.90 (2H, m),4.15-4.23 (3H, m), 4.50-4.10 (1H, m), 5.34(1H, d, J=2.8), 5.33 (3H, br.s), 8.75 (1H, d,J=7.1).
IR(Nujol, cm-1) :3325, 3200, 1793, 1762, 1741, 1685, 1653.
Example 57
(3RS, 5RS)-3-N-[L-2-N-(L-2-N-Benzyloxycarbonylamino-3-benzyloxycarbonylpropanoyl)amino-3-methylbutyryl]oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (57A) and (3RS, 5RS)-3-N-[L-2-N-(L-2-Amino-3-carboxypropanoyl)amino-3-methylbutyryl]oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (57B)
According to the similar method as described in example 46, protected title compound (57A) was obtained.
Yield:89%.
1H NMR(CDCl3, δ) :0.90(6H, t, J=7.2), 2.12-2.15 (1H, m), 2.69-2.88
(3H, m),3.08(1H, dd,J=4.2,17.4), 2.29 (1H, d, J=16.4),3.92-4.07 (1H, m), 4.10-4.25(2H, m), 4.43-4.62 (3H, m) , 5.13 (4K,s), 5.30-5.34 (1H, m), 5.97-6.04 (1H.br.d), 6.95-7.04 (1H, br.d), 7.35 (10H, d, J=3.0).
IR (Nuj ol , cm - 1 ) : 3425, 1783, 1737, 1679.
According to the similar method described as in example 46, the title compound (57B) was obtained as solid.
Yield:72%
m.p.190°C(dec.).
1H NMR (DMSO-d6 , δ) : 0 . 90 ( 6K , d, J=6 . 3 ) , 2 . 0-2 . 40 ( 2H, m) , 2 . 68-2 . 85 (2H, m) ,
3.16(1H,s), 3.25-3.39(1H, m) , 3.63-3.90 (2H, m), 4.08-4.26 (3H, m),4.48-4.58 (1H, m) , 5.32 (1H,s), 8.62-8.75 (1H, m).
IR (Nuj ol , cm- 1 ) : 1783, 1742. Example 58
(3RS, 5RS)-3-N-(L-2-N-Benzyloxycarbonylamino-3-methylbutyryl)aminomethyl-4-oxa-1-azabicyclo[3.2.0]neptan-7-one (58A) and
(3RS, 5RS)-3-N-(L-2-Amino-3-methylbutyryl)aminomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one hydrochloride (58B)
According to the same procedure described in example 43, N-protected title compound (55A) was obtained as solid.
Yield:44%
1H NMR(CDCl3,δ) : 0.97 (6H, d,J=7.0), 2.15 (1H, q, J=6.8),2.58-2.70
(1H, m),2.82(1H, d, J=16.6), 3.28 (1H, d, J=16.3), 3.34-3.62 (2H, m), 3.36-4.01(2H, m),4.25-4.41(1H,m), 5.12 (2H, d, J=1.4), 5.28 (1H, d, J=2.5) , 5.25 (1H,br.s), 6.19 (1H,br.s), 7.36 (5H,s).
IR (Nuj ol , cm- 1 ) : 3295, 1781, 1684, 1646, 1532.
The title compound (58B) was obtained after deprotection as described in example 43, followed by salt formation.
Yield: 57%
1H NMR(DMSO-d6, δ) :0.93 (6H, d, J=6.6), 2.00-2.16 (1H, m), 2.64-2.69 (1H, m), 2.79(1H, dd, J=3.7,16.6), 3.29-3.50 (4H, m), 3.60 (1H, d, J=4.8), 3.77-3.88(1H, m), 4.27-4.42 (1H,m) , 5.34 (1H,s),8.16 (2H,br.s), 8.68-8.81 (1H, m).
IR(Nujol, cm-1) : 3350, 3225, 1716, 1670.
Example 59
(3RS, 5RS)-3-N-(D-2-N-Benzyloxycarbonylamino-3-methylbutyryl) aminomethvl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (59A) and (3RS, 5RS)-3-N-(D-2-Amino-3-methylbutyryl)aminomethyl-4-oxa-1- azabicyclo[3.2.0]heotan-7-one hydrochloride (59B)
According to the same procedure described in example 43, N-protected title compound (59A) was obtained as solid. Yield:55%
m.p. :141-143°C
1H NMR(CDCl3, δ) : 0.91-0.99 ( 6H, m), 2.15 (1H, q, J=6.4), 2.59-2.72 (1H, m),
2.82(1H, d, J=16.3), 3.28 (1H, d,J=16.3), 3.36-2.62 (2H, m), 3.39-4.00 (2H, m), 4.28-4.41 (1H, m) , 5.12 (2H,s) , 5.25 (1H, d, J=2.6) , 5.31 (1H, br.s), 6.20(1H, br.s), 7.36(5H,s).
The title compound (59B) was obtained after deprotection as described in example 43, followed by salt formation.
Yield:31%
1H NMR(DMSO-d6,δ) :0.93 (6H,d,J=6.6), 2.00-2.16 (1H, m), 2.64-2.69 (1H, m),2.79(1H, dd, J=3.7,16.6), 3.29-3.50 (4H, m), 3.60 (1H, d, J=4.8),3.77-3.88(1H, m), 4.27-4.42 (1H, m) , 5.34 (1H, s), 8. IS (2H,br.s), 8.68-8.81 (1H, m).
IR(Nujol, cm-1) : 3350, 3225, 1716,1670.
Example 60
(3RS, 5SR)-3-(D-2-Benzyloxycarbonylamino-3-methylbutyryl)- oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (60A) and
(3RS, 5SR)-3-(D-2-Amino-3-methylbutyryl)oxymethyl-4-oxa-1-azabicyclo[3.2.0]heotan-7-one hydrochloride (60B)
According to the same procedure described in example 43, N-protected title compound ( 60A) was obtained.
Yield:85%
1H NMR(CDCl3,δ) : 0.91 (3H, d,J=6.9), 0.99 (3H, d,J=6.9), 2.10-2.22 (1H, m), 2.79-2.89 (2H, m), 3.27 (1H, d, J=16.1), 3.93-4.33 (3H, m),4.51-4.56 (1H, m) , 5.11(2H,s), 5.24(1H, d,J=9.0), 5.32 (1H, d, J=2.6),7.35(5H,s).
The title compound (60B) was obtained after deprotection as described in example 43, followed by salt formation.
Yield:70%
1H NMR(DMSO-d6, δ) : 0.88-0.96 (6H,m), 2.09-2.15 (1H, m), 2.68-2.96 (2H, m),3.27-3.40 (1H, m),3.77-4.24 (4H, m),4.30-4.53 (1H, m) , 5.28 (1H, d, J=2.6), 8.46(3H,br.s).
IR(Nujol,cm-1) :3255, 1781, 1748, 1635.
Example 61
(3RS, 5SR)-3-(D-2-Acetylamino-3-methylbutyryl)oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (61)
According to the same procedure described in example 44, title compound (61) was obtained.
Yield:49%
1H NMR(DMSO-d6,δ) : 0.90 (6H, m), 2.05 (3H, s ), 2.10-3.15 (1H, m), 2.75-2.90
(2H, m),3.30(1H, d, J=16.2), 3.90-4.15 (6H, m), 5.35 (1H, d,J=2.6) , 5.92
(1H, d, J=2.5).
IR(Nujol, cm-1) : 3315, 2945, 1794, 1743, 1665.
Example 62
(3RS, 5SR)-3-[D-2-N-(D-2-N-Benzyloxycarbonylamino-3-methylbutyryl)amino-3-methylbutyryl]oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (62A) and (3RS, 5SR)-3-[D-2-N-(D-2-Amino-3-methylbutyryl)amino-3-methylbut-yryl]oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan- 7-one hydrochloride (62B)
According to the same procedure described in example 41, N-protected title compound ( 62A) was obtained.
Yield:70%
1H NMR(CDCl3,δ) : 0.92-0.99 ( 12H, m), 2.09-2.22 (2H, m), 2.74-2.89 (2H, m),
3.30(1H, J=16.2), 3.94-4.24(4H,m), 4.52-4.59 (2H, m), 5.12 (2H, s), 5.33 (2H, m),6.36(1H,d,J=8.5), 7.34(5H,s).
The title compound (62B) was obtained after deprotection as described in example 43, followed by salt formation. Yield: 58%.
1H NMR(DMSO-d6,δ) : 0.96 (12H, d, J=6.7),2.06-2.16(2H,m),2.71-2.82
(2H, m), 3.38-3.39 (2H, m), 3.76-3.59 (2H, m),4.17-4.23 (3H, m),4.51-4.5:
(1H, m), 5.34(1H, d, J=2.8), 5.23 (3K, br.s), 8.73 (1H, d, J=7.1).
IR(Nujol, cm-1) : 3355, 3215, 1784, 1748, 1681, 1554.
Example 63 (3RS, 5RS)-3-N-(L-2-N-Benzyloxycarbonylamino-3-phenylpropanoyl) aminomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (63A) and
(3RS, 5RS)-3-N-(L-2-Amino-3-phenylpropanoyl)aminomethyl-4-oxa-1-azabicyclo[3.2.01heptan-7-one hydrochloride ( 63B)
According to the same procedure described in example 43, N-protected title compound (63A) was obtained as white solid.
Yield:55%
m.p. :149-151°C
1H NMR(CDCl3,δ) : 2.44 (1H, dd,J=7.2, 11.7), 2.56 (1H, dd,J=7.2, 11.9),
2.76(1H, d, J=16.7), 2.96-2.27 (4H, m), 3.77-3.90 ( 1H, m), 4.10-4.30 (1H, m),4.31-4.43 (1H, m), 5.04 (1H, d,J=2.6) , 5.09(2H,s), 5.18 (1H, d, J=2.6), 5.28 (1H, br.s) , 5.98 (1H, br.s), 7.27-7.35 (5H, m).
IR(Nujol, cm-1) : 3315, 1783, 1681, 1665.
The title compound (63B) was obtained after deprotection as described in example 43, followed by salt formation. m.p. :220-233°C(dec.)
1H NMR(DMSO-d6,δ) : 2.45 (1H, dd, J=6.7, 11.8 ), 2.62 (1H, dd, J=6.7, 11.6),
2.76(1H, d, J= 16.3), 3.06-3.39 (10H, m), 3.59-3.78 (2H,m) , 4.04 (1H, br.t, J=6.7) , 4.17-4.18 (1H,m), 5.22 (1H, a, J=2.3) , 5.28 (1H, a, J=2.4) , 7.22-7.36(10H, m), 8.37 (4H,br.s), 8.74 (2K,m) .
IR(Nujol, cm-1) .3205, 1776, 1561. Example 64
(3RS, 5RS)-3-N-[L-2-N-(L-2-N-Benzyloxycarbonylamino-3-carboxypropanoyl)amino-3-phenylpropanoyl]aminomethyl-4-oxa-1-azabicyclo- [3.2.0]heptan-7-one (64A) and (3RS.5RS)-3-N-[L-2-N-(L-2-Amino-3-carboxypropanoyl)amino-3-phenylpropanoyl]aminomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (64B)
A mixture of compound63B, obtained in example 63 (500mg), 3-N-Benzyloxycarbonylamino-3-benzyloxycarbonylpropanoic acid(822mg), 1,3-Dicyclohexyl-carbidiimide (475mg), Triethylamine (0.35ml) in Dichloromethane (20ml) was stirred at room temperature for 2hrs. Resulted mixture was loaded on silicagel column, eluted with Hexane-Ethyl acetate (1:2-1:3) and protected dipeptide (64A) was obtained as solid.
Yield: 51%
1H NMR(CDCl3,δ) : 2.44-2.61 (1H, m), 2.76 (1H, d,J=16.4), 2.90-3.12 (3H, m), 3.20(1H, dd, J=2.7,16.3), 3.33 (2H, t, J=5.3), 3.77-3.88 (1H, m), 4.19-4.23 (1H.m), 4.52-4.61 (1H, m), 5.08 (2H, s), 5.10 (2H, s), 5.20 (1H, d, J= 2.6), 5.71 (1H, br.s), 6.27 (1H, br.s), 6.79 (1H,br.d, J=7.7), 7.16-7.36 (10H, m).
IR(Nujol, cm-1) : 3285, 1782, 1730, 1693.
The protected compound, obtained above, was deprotected as in example 46 and the title compound (64B) was obtained as solid.
1H NMR(DMSO-d6,δ) : 1.70-1.96 (1H, m), 2.19-2.36 (1H, m), 2.67 (1H, dd, J= 6.4,11.5), 2.78(1H, d, J=17.1), 3.04-3.45 (3H, m), 3.12 (1H, dd, J=2.9, 16.5),3.78(1H, dd,J=6.5,11.5), 4.23-4.47 (1H, m), 5.31 (1H, d,J=2.6), 6.72 (2H, br.s), 8.35 (1H, br.s).
IR (Nuj ol , cm- 1 ) :3300,1782.
Example 65
(3RS, 5SR)-3-(L-3-N-Benzyloxycarbonylamino-3-benzyloxycarbonylpropanoyl)oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (65A) and (3RS.5SR)-3-(L-3-Amino-3-carboxypropanoyl)oxymethyl-4-oxa-1- azabicyclo[3.2.0]heotan-7-one (65B)
A mixture of (3RS, 5SR)-3-Bromomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (1.0g), (3-N-Benzyloxycarbonylanimo-3-benzyloxycarbonyl)propanoic acid(2.5g), Cesium carbonate (1.63g) and
Hexamethylphosphoric triamide (10ml) was heated with stirring at 60-70°C for 16hrs. The reaction mixture was then diluted with Ethyl acetate, washed with water, brine and dried over Magnesium sulfate. The residual oil after removal of solvent in vacuo, was purified by silicagel column chromatography eluted with Hexane-Ethyl acetate (1:1). The desired title compound ( 65A) was obtained as oil.
Yield: 86%.
1H NMR(CDCl3,δ) : 2.62-3.26 (5H, m), 3.83 -4.20 (3H, m), 4.36-4.46 (1H, m),
4.66-4.75 (1H, m), 5.10 (2H, s), 5.16 (2H, s), 5.23-5.26 (1H, m), 5.74-5.84
(1H, m),7.30(10H,s).
IR (Nuj ol , cm - 1 ) :3355, 2965, 1787, 1745.
The protected ester, obtained above, was deprotected as described in example 46 and the title compound (65B) was obtained as solid.
Yield: 69%.
m.p. :175°C.
1H NMR(DMSO-d6,δ) : 2.57-3.00 (4H, m), 3.23-3.70 (2H, m), 3.83-3.98 (1H, m),
4 . 13-4 . 25 (2H, m) , 4 . 53 -6 . 67 ( 1H, m) , 5 . 39 ( 1H, d , J=2 . 5 ) .
IR (Nuj ol , cm - 1 ) : 3130 , 1793 , 1736 .
Example 66
(3RS, 5SR)-3-(L-2-N-Benzyloxycarbonylamino-3-benzyloxycarbonylpropanoyl)oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (66A) and (3RS, 5SR)-3-(L-2-Amino-3-carboxypropanoyl)oxymethyl-4-oxa-1-azabicyclo[3.2.0]heotan-7-one (66B)
According to the same procedure described in example 65, protected title compound ( 66A) was cbtained.
Yield : 74%.
2H NMR(CDCl3, δ) :2.68-2.86 (1H, m), 2.79 (1H, dd, J=2.4, 16.5 ),2.90-3.10
(1H, m),3.19(1H, d, J=16.3), 3.84-3.96(1H, m), 4.17-4.22(2H, m), 4.41-4.56 (1H, m),4.62-4.77 (1H, m) , 5.12(4H,s), 5.26 (1H, d,J=2.6) , 5.74(1H, br.d),7.34(5H,s), 7.36(5H,s).
IR (Neat, cm-1) : 3355, 1781, 1753, 1731, 1518.
The protected compound, obtained above, was deprotected as described in example 46 and the title compound (66B) was obtained as solid.
Yield:55%
m.p. :150-180°C(dec.).
1H NMR(DMSO-d6,δ) : 2.77-2.64 (1H, m), 2.91 (1H, dd, J=4.3, 11.2), 2.94(1H, d,J=16.7),3.40(1H, dd,J=1.6,19.6), 4.05 (1H, dd, J=7.0, 11.9), 4.28-4.52 (3H, m),4.70-4.79 (1H, m), 5.46 (1H, d,J=2.4).
IR(Nujol, cm-1) :3375, 1776, 1752.
Example 67
(3RS, 5RS)-3-N-(L-2-N-Benzyloxycarbonylamino-3-benzyloxycarbonyl propanoyl)aminomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one(67A) and (3RS, 5RS)-3-N-(L-2-Amino-3-carboxypropanoyl)aminomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one(67B)
(3RS, 5RS)-3-Azidomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one, (1.0g), was hydrogenated by using 10% Palladium on activated carbon(250mg) at 50psi for lhr. After removal of catalyst, L-(2-N-Benzyloxycarbonylamino-3-benzyloxycabonyl)propanoic acid
(2.55g), and Triethylamine (0.1ml) was added to the filtrate, followed by dropwise addition cf a solution of 1,3-Dicyclohexylcarbodiimide (1.47g) in Ethyl acetate (10ml) under ice-cooled condition. After 1hr stirring, the reaction mixture was loaded on silicagel column and eluted with Hexane-Ethyl acetate (2:3). The desired protected amide derivative (67A) was obtained as oil. Yield:50%
1H NMR(CDCl3,δ) : 2.56-2.71 (1H, m), 2.61 (1H, d, J=16.7 ), 3.06-3.18
(1H, m),3.26(1H, dd, J=2.8,16.4 ), 2.36-3.52 (2H, m), 3.63-3.94 (1H, m), 4.23-4.37 (1H.m),4.50-4.64 (1H, m), 5.13 (4K, d,J=2.8), 5.24-5.29 (1H, m), 5.90(1H,br, d), 6.71 (1H,br, s),7.34 (5H,s),7.36(5H,s).
IR (Neat, cm-1) : 3330, 1778, 1727, 1667, 1529.
The protected amido derivative obtained above was deprotected as described in example 46 and the title compound (67B) was obtained as solid.
Yield:74%
m.p.275-285°C(dec.)
1H NMR(DMSO-d6,δ) : 2.65-2.86 (3H, m), 2.93 (1H, d,J=17.2),4.40(1H, dd,
J=2.2,16.7), 3.47-3.55(2H, m), 4.00 (1H, dd,J=6.6, 11.9 ),4.23 (1H, dd, J=5.6,7.4), 4.51-4.56(1H, m), 5.43 (1H, d, J=2.6).
IR(Nujol,cm-1) :3215, 1677, 1562.
Example 68
(3RS, 5SR)-3-(D-4-N-Benzyloxycarbonylamino-4-benzyloxycarbonyl butyryl)oxymethyl-4-oxa-1-azabicyclo[3.2.0]hentan-7-one (68A) and (3RS, 5SR)-3-(D-4-Amino-4-carboxvbutyryl)oxymethyl-4-oxa-1- azabicyclo[3.2.0]heptan-7-one (68B)
According to the same procedure as example 65, protected title compound (68A) was obtained as oil.
Yield: 48%
1H NMR(CDCl3,δ) : 1.97-2.19 (1H, m), 2.17-2.30 (1H, m), 2.40-2.50 (2H, m),
2.73(1H, dd,J=6.1,11.6), 3.25 (1H, d,J=16.2), 3.94 (1H, dd, J=6.9, 11, 6), 4.05-4.20 (2H, m), 4.40-4.55 (2H, m), 5.10 (2H, m), 5.1772H, m), 5.30 (1H, t, J=2.8) , 5.39 (br.s),7.35(10H,s).
IR (Neat, cm-1) : 3355, 1784, 1739, 1525.
The protected ester derivative obtained above was deprotected as described in example 46 and the title compound ( 68B) was obtained as solid.
Yield: 82%
m.p. :>250°C(dec.)
1H NMR(DMSO-d6,δ) : 1.90-2.04 (2H, m), 2.75 (1H, dd, J=5.9, 16.4),2.50-2.57
(2H, m),2.80(1H, d, J=16.4), 3.33 (1H, dd, J=2.6, 16.2 ), 3.84 (1H, dd, J=7.1, 11.6),4.12(2H, d,J=3.4), 4.52-4.60 ( 1H, m), 5.32 (1H, d,J=2.5).
Example 69
(3RS.5RS) -3-N- (D-4-N-Benzyloxycarbonylamino-4-benzyloxycarbonyl butyryl)aminomethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (69A) and (3RS.5RS)-3-N-(D-4-Amino-4-carboxybutyryl)aminomethyl-4-oxa-1-azabicyclo[3.2.0]heptan--7-one (69B)
According to the same procedure as example 67, protected title compound (69A) was obtained as solid.
Yield: 22%
1H NMR(CDCl3,δ) : 1.90-2.10 (1H, m), 2.11-2.35 (3H, m) , 2.60-2.72 (1H, m),
2.81(1H, d,J=16.2), 3.20-3.60(3H, m), 3.92 (1H, dd, J=7.4, 12.0),4.30-4.50 (1H, m) , 5.11 (2H,s) , 5.17 (2H,s) , 5.30 (1H,s) , 5.59 (1H,br.s) ,6.16 (1H,br.s), 7.35(10H,s).
IR (Neat, cm-1) : 3345, 1783, 1720, 1654, 1533.
The protected amido derivative obtained above was deprotected as described in example 46 and the title compound (69B) was obtained as solid.
Yield:48%
1H NMR(DMSO-d6,δ) : 1.74-1.83 (1H, m), 1.84-1.93 (1H, m), 2.26 (2H, t, J=
7.9), 2.67(1H, dd,J=6.4,11.5), 2.77 (1H, d, J=16.3 ), 3.13-3.18 (1H, m), 3.19-3.22 (1H, m),3.25-3.33(1H, m), 3.32 (1H, dd, J=2.7, 16.3), 3.77(1H, dd,J=6.6, 11.6), 4.28-4.34 (1H, m), 5.31 (1H, d, J=2.9), 7, 30 (1H,br.s), 8.33(1H.br,s). Example 70
(3RS, 5SR)-3-(L-2-N-Benzyloxycarbonylamino-3-hydroxypropanoyl) oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (70)
780mg (3.8 mmol) of (3RS, 5SR)-3-Bromomethyl-4-oxa-1-azabicyclo
[3.2.0]heptan-7-one and 1.0g of sodium salt of L-(2-N-Benzyloxycarbonylamino-3-hydroxy)propanoic acid in 0.8 ml of Hexamethylphosphoric triamide was heated at 65°C fcr 3hrs. General work-up and purification gave the title compound as oil.
Yield: 64%.
1H NMR(CDCl3.δ) : 2.19-2.32 (1H, m), 2.75-2.87 (2H, m), 3.21-3.32 (1H, dd,
J=2.6,13.6), 3.92-4.55(7H, m), 5.13 (2H, s), 5.32 (1H, s), 5.66-5.74 (1H, m),7.34(5H,s).
IR(Nujol,cm-1) : 3430,2963, 1780, 1751.
Example 71
(3RS, 5SR)-3-[L-2-N-(D-2-N-Benzyloxycarbonylaminopropanoyl)amino- 3-hydroxypropanoyl]oxymethyl-4-oxa-1-azabicyclo[3.2.0]heotan-7- one (71)
600mg (1.65mmol) of compound(70) and 450mg of 10% Palladium on activated carbon in 20 ml Ethyl acetate was shaken under Hydrogen atmosphere for lhr and filtered through celite. To the filtrate 370mg (1.6mmol) of D-2-(N-Benzyloxy-carbonyl) aminopropanoic acid and 170mg (0.80mmol) of 1,3-Dicyclohexylcarbodiimide were added under cooling and stirred at room temperature fcr 3 hrs. The solid was removed by filtration and the solution was concentrated. The residue was purified by flash column using Ethyl acetateHexane(4:1) as eluent. The title compound (71) was obtained as solid.
Yield:3%.
m.p. :150-155°C.
1H NMR(CDCl3,δ) : 1.41 (3H, d,J=7. C), 2.38 (1H, s), 2.77-2.90 (2H, m), 3.27 (1H, dd, J=2.3,11.5), 3.85-4.57(8H, m) , 5.12 (2H,s) , 5.34 (1H,s: 95 (1H, d, J=7.2), 7.35(5H,s), 7.56 (1H, J=7.6) .
Example 72
(3R5, 5SR)-3-L-(2-N-Benzyloxycarbonylamino-3-benzyloxypropanoyl) oxymethyl-4-oxa-1-azabicyclo[3.2.0]hentar-7-one (72)
According to the same procedure as example 61, the title compound (72) was obtained as oil.
Yield: 94%.
1H NMR(CDCl3,δ) : 2.70-2.82 (2H, m), 2.14-3.22 (1H, m), 2.66-3.74 (1H, m),
3.84-3.95(2H, m), 4.16-4.33 (2H, m), 4.44-4.56 (4H, m), 5.12 2H, s) , 5.24 (1H, dd,J=2.3,6.7), 5.62(1H, d, J=4.5), 7.25-7.36 (10H, m).
IR (Neat, cm-1) :3345, 1781, 1718.
Example 73
(3RS,5SR)-3-[L-2-N-(D-2-N-Benzyloxycarbonylaminopropanoyl)amino¬3-benzyloxypropanoyl]oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (73)
According to the same procedure as example 41, the title compound (73) was obtained as solid.
Yield:34%.
m.p. :107-108°C.
1H NMR(CDCl3,δ) : 1.48 (3H, d,J=2.6 ), 2.68-2.80 (2H, m), 3.14-3.22 (1H.m),
3.60-3.70(1H, m), 3.85-3.94 (2H,ιr.), 4.04-4.55 (6H, m), 4.70-4.78 (1H, m), 5.10(2H,s) , 5.25 (1H, dd,J=2.3, 6.8) , 5.30-5.38 (1H, m),6.85-6.92
(1H, m),7.25-7.34(10H, m).
IR(Nujol, cm-1) :3315,1780. Example 74
(3RS, 5SR)-3-[L-2-N-(L-2-N-Benzyloxycarbonylamino-3-methylbutyryl)amino-3-henzyloxypropanoyloxymethyl]-4-oxa-1-azabicyclo[3.2.0] heptan-7-one (74A) and (2RS, 5SR)-3-[L-2-N-(L-2-N-Amino-3- methylbutyryl)amino-3-benzyloxypropanoyloxymethyl]-4-oxa-1- azabicyclo[3.2.0]heptan-7-one hydrochloride (74B)
According to the same procedure as example 41, protected title compound (74A) was obtained as solid.
Yield: 51%.
m.p. :100-102°C.
1H NMR(CDCl3,δ) : 0.90-0.95 (3H, d,J=3.0), 0.95-1.04 (3H, d, J=2.8), 2.10- 2.18(1H, m), 2.67-2.82 (2H, m), 3.17-3.27 (1H, m), 3.62-3.68(1H, m), 3.86-3.96(2H, m), 4.05-4.26 (3H, m), 4.42-4.56 (3H, m), 4.72-4.78 (1H, m), 5.13 (2H,s) , 5.23 (1H, dd,J=2.4,16.2), 5.34 (1H, d,J=4.5), 6.58 (1H, d, J=4.4), 7.25-7.36(10H, m).
IR(Nujol, cm-1) :3320, 2970, 1781.
The title compound (74B) was obtained after deprotection as described in example 43, followed by salt formation. yleld:77%.
m.p.:168°C (dec)
1H NMR(DMSO-d6,δ) : 0.98-1.18 (6H, m), 2.12-2.22 (1H, m), 2.72-2.86 (2H, m),
3.28-3.34(1H, m), 3.68-3.94 (4H, m), 4.20-4.28 (2H, m), 4.52-4.77 (4H, m), 5.34(1H, dd,J=2.5,16.2), 7.40 (5H, s), 8.24-8.32 (3H, s), 9.06 (1H, d, J=8.1).
IR(Nujol, cm-1) : 3335,1772,1678.
Example 75
(3RS, 5SR)-3-(L-2-Acetamido-3-hydroxypropanoyl)oxymethyl-4-oxa-1- azabicyclo[3.2.0]heptan-7-one (75A) and (3RS,55R)-3-(2-Acetamido- 3-acetoxypropanoyl)oxymethyl-4-oxa-1-azabicyclo[3.2.0]heotan-7-one (75B)
500mg (1.3 mmol) of the compound 72 was deprotected as usual manner. To this 140mg (1.37mmol. cf Trietrylamine was added and cooled to 0°C. 110mg (1.37mmol) Acetyl chloride was added, stirred at the same temperature for 1hr followed by at room temperature for 1hr. The solution was filtered and the filtrate was concentrated. The compound was purified over silica gel using Ethyl acetate first and then Ethyl acetate-Acetone (5:1). Two fractions were collected. N-Acetyl compound (75A) and N,O-diacetyl compound (75B) were obtained.
Monoacetyl compound (75A) :
Yield:39%
1H NMR(CDCl3,δ) : 2.07 (6H, s), 2.75-2.90 (2H, m), 3.25-3.38 (1H, m), 3.95- 4.07 (1H, m), 4.24-4.36(3H, m), 4.50-4.60 (2H, m), 4.84-4.92 (1H, m), 5.34 (1H, d, J=2.5), 6.20-6.30 (1H, m).
IR(Nujol, cm-1) :3335,2960,1779,1664.
Diacetyl compound ( 75B ) :
Yield: 26%
1H NMR(CDCl3,δ) : 2.08 (3H, s), 2.44 (1H, t, J=6.9), 2.77-2.90 (2H, m), 3.30
(1H, dd, J=2.8,12.2), 3.95-4.40 (5H, m), 4.54-4.64 (1H, m),4.70-4.78 (1H, m), 5.36(1H, d, J=2.6), 6.38-6.46 (1H, m).
IR (Neat, cm-1) : 3360, 2968, 1774, 1652.
Example 76
(3RS, 5RS)-3-[N-(L-2-N-Benzyloxycarbonylamino-3-hydroxypropanoyl) aminomethyl]-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (76A) and (3RS, 5RS)-3-[N-(L-2-Amino-3-hydroxypropanoyl)aminomethyl]-4-oxa-1-azabicyclo[3.2.01heptan-7-one hydrochloride (76B)
According to the same procedure described in example 43, N-protected title compound (76A) was obtained as white solid.
Yield:38%
m.p. : 114-116, 124.5-137°C
1H NMR(CDCl3,δ) : 2.69 (1H, dd, J=6.2, 11.0,), 2.51 (1H, d,J=15.8), 3.25 (1H, d,J=16.3), 3.47(2H, t,J= 5.3), 3.62-3.77 (1H, m),3.85-3.47 (3H, m), 4.17-4.30 (1H, m), 4.30-4.43 (1H, m), 5.13 (2H,s), 5.28-5.31 (1H, m), 6.11-6.21(1H, m), 7.10 (1H, br.s), 7.36 (5H,s).
IR(Nujol, cm-1) : 3280, 1772, 1553, 1554, 1457.
The title compound (76B) was obtained after deprotection as described in example 43, followed by salt formation.
Yield:38%
1H NMR(D2O,δ) : 2.72-2.88 (1H, m), 2.91 (1H,d,J=13.3), 3.39 (1H, dd, J=2.6,
16.3), 3.50(2H, d,J=5.3), 3.70-4.20 (4H, m), 4.462H, m), 5.46(1H, d,
J=2.6).
IR(Nujol, cm-1) : 3360, 3325,1766, 1679, 1630.
Example 77
(3RS, 5SR)-3-(L-2, 6-N-Dibenzyloxycarbonylaminohexanoyl)oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one(77A) and (3RS, 5SR)-3-(L-2,6-Diacetamidohexanoyl)oxymethyl-4-oxa-1-azabicyclo[3,2,0]-heotan-7-one(77B)
According to the same procedure described in example 40, (2,6-Dibenzyloxycarbonylamino)hexanoyloxy derivative (77A) was obtained as thick oil.
Yield:76%
1H NMR(CDCl3,δ) : 1.42-1.80 (6H, m), 2.73-2.86 (2H, m), 3.18-3.30 (3H, m),
3.91-4.52 (5H, m), 4386-5340 (7H, m), 7.33(10H,s).
IR (Neat, cm-1) : 3355, 3070, 2960, 1781, 1751, 1721.
To a solution of (2, 6-Dibenzyloxycarbonylamino)hexanoyloxy derivative (77A) obtained above (1.8g, 3.33mmol) and Acetic anhydride (3.2ml, 3.33mmol) in Ethyl acetate (100ml) was added Palladium on activated caroon (10%, 53.8% moist, 2.0 g) and the mixture was hydrogenolysed at 50 psi for 2 hr. The catalyst was filtered off over a pad of celite and the solution was
concentrated. Purification on a silica gel column using Ethyl acetate-acetone (1:2:5) as the eluent gave a thick oil(77B).
Yield:63%.
1H NMR(CDCl3,δ) : 1.19 -1.87 (6H, m),1.98(3H, s , 2.04 (3H, s), 2.76-2.89
(2H, m), 3.14-3.34(3H, m), 3.93 (1H, dd, J=11.6, 7.0), 4.10-4.25 (2H, m), 4.47-4.58 (2H, m), 5.36 (1H, br.s), 5.89 (1H, br. z), 6.49 (1H, d,J=7.0).
IR (Neat, cm-1) : 3320, 3075, 2693, 1784, 1762, 1741, 1656.
Example 78
(3RS, 5SR)-3-(L-5-acetamide-2-N-Benzyloxycarbonylaminohexanoyl) oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptar-7-one (78)
To a Ethyl acetate(60ml) solution of 2, 5-dibenzyloxycarbonylamino hexanoyloxy derivative (77A), (1.0g, 1.85mmol) was added Palladium on activated carbon (10%,1.0g) and the mixture was hydrogenolysed at 50 psi for 2 h. The mixture was filtered through a pad of celite and cooled in an ice-bath. Acetic anhydride
(0.44ml, 4.66mmol) and Triethylamine (0.77ml) were added and the mixture was stirred for 2 h and washed with water (60ml) and brine. The Ethyl acetate solution was dried over Magnesium sulfate, concentrated and passed through a silica gel column chromatography using Ethyl acetate as the eluent to give an oil(78)
Yield: 12%.
1H NMR(CDCl3,δ) : 1.29-1.89 (6H, m), 2.01 (3H, s), 2.72-2.88 (2H, m), 3.14- 3.31(3H, m), 3.96 (1H, dd, J=11.6, 6.9), 4.13-4.29 (2H, m), 4.53-4.56 (2H, m), 4.97 (1H, br.t), 5.09(2H, s), 5.32 (1H, br. s), 6.29 (1H, d, J=7.0), 7.34 (5H
,s).
IR(Nujol, cm-1) : 3335, 2950, 1783, 1740, 1717, 1659. Example 79
(3RS, 5SR)-3-(L-2-N-Benzyloxycarbonylamino-3-phenyl)propanoyl-oxymethyl-4-oxa-1-azabicyclo[3.2.0]heptan-7-one (79)
According to the same procedure described in example 43, N-protected title compound (79) was obtained.
Yield: 63%
1H NMR(CDCl3, δ) : 2.57-2.74 (1H, m), 2.82 (1H, d,J=16.2), 3.11 (2H, d,
J=6.1), 3.25(1H, dd, J=2.3, 16.0), 2.53-3.95 (1H, m), 4.12-4.23 (2H, m), 4.40-4.55 (1H, m), 4.59-4.75 (1H, m), 5.10(2H, s), 5.12-5.27 (2H, m), 7.20- 7.38(10H, m).
IR (Neat, cm-1) : 3335, 1784, 1747, 1722.
TEST EXAMPLE
In Vitro KB Cell Cytotoxicity Assay
In vitro KB cell cytoxocity assay was done by modification of the crystal violet assay (Grillis et al.. Anal Biochem., 159, 109-113 (1986).
KB cells were cultivated in Eagles minimum essential medium supplemented with 10% calf serum and incubated at 37°C in a
humidified 5% CO2 atmosphere to prepare a cell stock. Cells were counted using a neubauer hemocytometer and seeded in 96 well plates at 100 μl of 3 × 104 cells/ml and cultured for one day. Test compounds were diluted and 100 μl of the solution was added in triplicate wells to give final concentration of 10, 5, 1, 0.5, 0.1, 0.05 and 0.01μg/ml. Control wells were identical except that test compound was absent. These were cultured fcr three days.
Then the cells were fixed with addition of 20 μl of 25%
glutaraldehyde for 15 minutes, washed with water and dried. Then stained with 100 μl of 0.05% crystal violet for 15minutes, washed with water and dried. The wells are eluted with 100μl of 0.05M NaH2PO4/ethanol (1:1 v/v) and read at OD540 on a multiscan
spectrophotometer. Inhibition value of cell growth was calculated based on optical density using the following equation;
Figure imgf000070_0001
TD50 values were calculated from linear regression ines of the log-logit plot.
The compound of formula (I) was assayed by this method against KB cell lines and their TD50 values are reported in Table 1. TEST EXAMPLE 2
In Vitro L1210 and P388 Cell Cytotoxicity Assay
In vitro :L1210 and P388 cell cytotoxicity assay was done by the method of microculture tetrazolium assay (Alley et al., Cancer Research, 48, 589-601 (1988).
L1210 and P388 cells were cultivated in RPMI 1640 medium
supplemented with 10% fetal calf serum and 50 μl of 2-mercaptoethanol at 37ºC m humidified 5% CO2 atmosphere to prepare a cell stock. Cells were counted using neubauer hemocytometer and seed in 96 well plates at 100 μl of 0.5 × 104 cells per ml. The test compounds were diluted and 100 μl of the solution was added in triplicate wells to give the final concentration of 10, 5, 1, 0.5, 0.1, 0.05 and 0.01 μg/ml. Control wells were identical except that the test compound was absent. These were cultured for three days. Results were assayed using the microculture tetrazolium assay briefly. 50 μl of MTT formazoan working solution (1:5 v/v in culture medium) was added to each well and cultures were incubated at 37°C for 4 hrs. Culture plates were centrifuged at low speed for 5 minutes. All but 10-20 μl of culture medium
supernatant was removed by slow aspiration and replaced by
mechanical shaker and read at OD540 on a multiscan
spectrophotometer. Inhibition value of cell growth was calculated based on optical density using the following equation;
Figure imgf000071_0001
TD50 values were calculated from linear regression ines of the log-logit plot.
The compound of formula (I) was assayed by this method against L1210 and P388 cell lines and their TD50 values are reported in
Table 2. TABLE 1
In Vitro Cell Toxicity of Compounds of
General Formula I
Example No. X R KB Cell Cytotoxicity
(TD50 μg/ml)
1 NH COCH3 0.263
2 NH COCH3 (3 S , 5S ) 0.77
3 NH COCH3 (3R, 5R) 3.15
4 NH CO(CH2)4CH3 0.312
5 NH COCH(CH3)2 0.181
6 NH COC6H11 (alicyclic) 0.073
7 NH COCF3 0.205
8 NH COCH2Cl 0.084
9 NH COCH2N3 0.296
10 NH COCH2-triazole(1(,2,3) 0.282
11 NH COCH2CCHO 0.147
12 NH COCH2OH 0.125
13 NH CO(CH2)5Br 0.491
14 NH CO(CH2)5OCHO 0.243
15 NH CO(CH2)5N3 0.254
16 NH CO(CH2)5-triazole(1,2,3) 0.318
17 NH CO(CH2)5NHCOCH3 0.439
18 NH CO(CH2)2-COOH 2.85
19 NH CO(CH2)2-CH=CH2 0.266
20 NH COC=CH 0.333
21 NH COOCH2C6H5 0.340
22 NH H.HCl 0.344
23 NH COC6H5 C.088
24 NH COC6H4OH(4) C.276
25 NH COC6H4OCH3(4) 0.255
26 NH COC6H3(OCH3)2(3,4) 0.249
27 NH CCC6H4F(4) 0.24
28 NH COC6H2F2(2,5) 0.379
29 NH COC6H2F3(2,4,5) 0.535 Table 1 (continued )
Example No. X R KB Cell Cytotoxicity
(TD50 μg/ml)
30 NH COC6H4CN(4) 0.378
31 NH COCH2-thiophene(2) 0.098
32 NH CO-pyridine (3) 0.78
33 NH CON(C2H5)2 0.246
34 NH CONHCH2 clavair. 0.151
35 NH SO2CH3 0.198
36 NH SO2C6H4CH3 (4) 0.338
37 NH SO2C6H4Cl (4) 0.484
38 NH SO2C6H4OCH3 (4) 0.158
39 O COCH2NH2.HCI 0.613
40B O COCH2NHCOCH2NK2.HCl 0.636
41B O COCH2NH-(L)-COCH(CH3)NH2·HCl 0.295
42B O COCH2NH-(L)-COCH[CH(CH3)2]NH2.HCl 0.388
43 NH COCH2NH2 ·HCl 0.429
44 NH COCH2NHCOCH3 0.341
45B NH COCH2NH-(L)-COCH[CH(CH3)2_NH2.HCl 1.97
46B NH COCH2NH-(L)-COCH(NH2)CH2COOH 2.63
48B O (L)COCH(CH3)NH2.HCl 0.878
49B O (L)COCH(CH3)NH-(L)- 0.537
COCH[CH(CH3)2]NH2.HCl
50B NH (L)COCH{CH3)NH2.HCl 0.657
5IB O (D) COCH(CH3)NH2.HCl C.867
52 O (D) COCH(CH3)NH-(D)-COCH- 0.197
{CH3)NHCOCH2-thiophene (2)
53B NH (D) COCH(CH3)NH2.HCl 0.316
54B O (L) COCK[CH(CH3)2]NH2.HCl 1.9
55B O (L)COCH[CH(CH3)2]NH- 0.522
COCH2NH2.HCI
56B O (L)COCH[CH(CH3)2]NH- 0.283
(L)-COCH[CH(CH3)2]NH2·HCl
57B O (L)COCH[CH(CH3)2]NH- 1.54
(L)-COCH(NH2)CH2COOH
60B O (D)COCH[CH(CH3)2]NH2·HCl 0.903 Table 1 (continued)
Example No. X KB Cell Cytotoxicity
(TD50 μg/ml)
61 O (D) COCH[CH(CH3)2]NHCOCH3 0.385
62B O (D) COCH[CH(CH3)2]NK- 0.3B1
(D)-COCH[CH(CH3)2]NH2-HCl
63B NH (L) COCH(CH2C6H5)NH2.HCl 0.573
64B NH (L) COCH(CH2C6H5)NH- 2.65
(L) -COCH(NH2)CH2COOH
65B O (L) COCH2CH(NH2)COOH C.451
66B O (L) COCH(NH2)CH2COOH 0.204
67B NK (L) CCCH (NH2)CH2COOH 6.04
68B O (D) CO(CH2)2CH(NH2)COOH 0.189
69B NH (D) CO (CH2)2CH(NH2)COOH 2.47
70 O (L)COCH(CH2OH)NHZ 0.352
71 O (L)COCH(CH2OH)NH- 0.549
(D)-COCH(CH3)NHZ
72 O (L) COCH(CH2OCH2C6H5)KHZ 1.67
73 O (L)COCH(CH2OCH2C6H5)NH- 2.22
(D)-COCH(CH3)NHZ
74B O (L)COCH(CH2OCH2C6H5)NH- 0.669
(L)-COCH[CH(CH3)2]NH2·HCl
75A O (L)COCH(CH2OH)NHCOCH3 1.9B
75B O (L)COCH(CH2OCOCH3)NHCOCH3 0.567
76B NH (L) CCCH(CH2OH)NH2·HCl 8.81
77A O (L)COCH(NKZ)(CH2)4NHZ 1.18
78 O (L)COCH(NHCOCH3) (CH2) 2NHZ 3.38
Z ;Benzyloxycarbonyl TABLE 2
In Vitro Cell Toxicity of Compounds of General Formula I
Against Sensitive and Resistant Tumor Cell Lines
Cell Toxicity(μg/ml)
Example No. L-1210(S) L-1210(R) p388(S) P388(R)
1 0.103 0.104 3.103 0.074
G0069A 2.17 1.67 1.02 0.751
Adriamycin 0.004 0.35 C.003 0.575
Vincristine 0.002 0.20 2.95×10-7 0.279
TEST EXAMPLE In Vivo Antitumor Activity Against Sarcoma 180
The compounds of general formula (I) were tested in vivo against Sarcoma 180 xenografted tumor to mice as illustrated herein after.
Sarcoma 180, 5×106 cells were inoculated by S.C. to male ICR mice (6 weeks old) on day 0. Drugs were administered on days 1, 5 and 9. Mice were killed and tumor weight was measured on day 12 after transplantation. The percentage inhibition of tumor growth was calculated from the mean tumor weight cf the treated group
compared with that of the control group. Number of mice used in each group was between 6 to 7. The percentage inhibition of tumor Sarcoma 180 group by compound cf formula (I) are summarized in Table 3.
TABLE 3
Effect of Compounds of Formula (I) Against Sarcoma 180
(s.c. - i.p.) in Male ICR
Example No. Dose Mortality % Inhibition
(mg/kg/day) in 12 days
1 12.5 0/6 71.4
6.25 0/6 49.3
3.1 0/6 33.9
2 20 1/7 77.5
10 0/6 44.7
4 100 0/6 49.4
6 80 0/6 43.3
40 0/6 35.7
20 0/6 32.1 Effect of Compounds Against Sarcoma 180 (contonued)
Example No. Dose Mortality % Inhibition
(mg/kg/day) in 12 days
7 100 2/6 39.8
8 35 1/6 64.0
17.5 0/6 51.3
8.6 0/6 39.0
22 80 0/6 40.3
40 0/6 26.7
23 100 0/6 27.8
31 40 1/6 35.5
33 90 0/6 74.5
45 0/6 66.2
22.5 0/6 46.6
34 25 5/6 92.5
12.5 0/6 76.3
6.2 0/6 59.8
35 100 1/6 64.6
38 100 1/6 72.0
50 0/6 55.4
25 0/6 26.5
39 50 0/6 76.7
25 0/6 56.7
12.5 0/6 41.9
40B 50 0/6 72.0
25 0/6 54.0
12.5 0/6 48.3
41B 25 0/6 62.8
12.5 0/6 43.9
42B 50 0/6 85.8
25 0/6 69.0
12.5 0/6 49.9
43 50 0/6 72.1
25 0/6 58.9
12.5 0/6 57.0
6.3 0/6 48.7 Effect of Compounds Against Sarcoma 180 (contonued)
Example No, Dose Mortality % Inhibition
(mg/kg/day in 12 days
44 25 4/6 85.3
12.5 0/6 45.9
45B 50 0/6 81.7
25 0/6 39.3
46B 50 1/6 76.9
25 0/6 55.7
12.5 0/6 44.7
48B 50 2/6 77.3
25 0/6 66.8
12.5 0/6 44.9
49B 50 0/6 71.0
25 0/6 55.7
51B 100 5/6 93.8
50 0/6 82.4
25 0/6 50.6
12.5 0/6 40.9
52 100 2/6 70.7
50 0/6 63.9
25 0/6 45.2
53B 25 1/6 73.8
12.5 0/6 61.9
6.3 0/6 47.3
54B 100 0/6 84.3
50 0/6 53.8
25 0/6 28.5
55B 50 0/6 74.4
25 0/6 47.6
56B 50 0/6 73.2
25 0/6 69.2
12.5 0/6 48.9
57B 50 1/6 83.1
25 0/6 58.1
12.5 0/6 40.9 Effect of Compounds Against Sarcoma 180 (contonued)
Example No. Dose Mortality % Inhibition
(mg/kg/day) in 12 days
60B 100 0/6 77.7
50 0/6 49.8
62B 100 0/6 42.1
63B 100 0/6 57.6
50 0/6 50.3
66B 25 0/6 62.9
12.5 0/6 53.2
6.3 0/6 33.7
65B 100 0/6 55.0
67B 100 0/6 65.9
50 0/6 41.1
68B 50 3/6 80.3
25 0/6 69.7
12.5 0/6 49.1
69B 100 0/6 37.8
74B 100 1/6 84.1
50 0/6 49.9
75A 25 0/6 61.9
12.5 0/6 42.8
75B 50 4/6 77.8
25 0/6 65.1
12.5 0/6 37.8
77A 100 2/6 67.3
50 0/6 39.1

Claims

1. 3-(substituted methyl)-4-oxa-1-azabicyclo[3.2.0]heptan- 7-one derivatives of formula I or a pharmaceutically
acceptable salt thereof,
Figure imgf000080_0001
wherein X is NH or 0,
when X is NH,
R is hydrogen, -COR1, wherein R1 is (i) a C1-C6 alkyl group which may be substituted by 1-3
substituents selected from halogen, hydroxy, formyloxy, azido, carboxyl, heteroaryl or acetamide, (ii) a C2-C4 alkenyl group, (iii) a C2-C4 alkynyl group, (iv) a C3-C6 cycloalkyl group, (v) a phenyl group which may be substituted by 1-3 substituents selected from hydroxy, halogen, C1-C6 alkoxy group or cyano, (vi) a C5-C6 heteroaryl group, (vii) a NR2R3 wherein R2 and R3 are the same or different and each is a hydrogen, C1-C6 alkyl group or (7-oxo-1-aza-4-oxabicyclo[3.2.0]hept-3- yl)methyl group or (viii) benzyloxy group;
-SO2R4 wherein R4 is a C1-C6 alkyl group or a phenyl group which may be substituted by 1-3 substituents selected from C1-C6 alkyl group, halogen or C1-C6 alkoxy group;
1-2 amino acid residue which may be substituted with protective group, when X is 0,
R is 1-2 amino acid residue which may be
substituted with protective group.
2. The derivatives of formula I as set forth in claim 1 wherein X is NH and R is -COR1 wherein Ri is C 1-C 6 alkyl group which may be substituted by 1-3 substituents selected from halogen, hydroxy, formyloxy, azido, carboxy, heteroaryl or acetamido.
3. The derivatives of formula I as set forth in claim 1
wherein X is NH and R is -COR1 wherein R1 is a NR2R3 wherein R2 and R3 are the same or different and each is a hydrogen, C1-C6 alkyl group or (7-oxo-i-aza-4-oxabicyclo[3.2.0]hept-3- yl)methyl group.
4. The derivatives of formula I as set forth in claim 1
wherein X is NH or O and R is 1-2 amino acid residue which may be substituted with protective group.
5. The derivatives cf formula I as set forth in claim 1
wherein X is NH, having (3R,5R) or (3S,5S) configuration at two asymmetric carbons on 4-oxa-1-azabicyclo[3.2.0]heptan-7- one ring system or the mixture of them.
6. The derivatives of formula I as set forth in claim 1
wherein X is O, having (3R,5S) or (3S, 5R) configuration at two asymmetric carbons on 4-oxa-1-azabiyclo[3.2.0]heptan-7- one ring system or the mixture of them.
7. The pharmaceutically acceptable salts of formula I as set forth in claim 1 are selected from sodium, potassium, magnesium, calcium, hydrogen chloride, tartaric acid, succinic acid, fumaric acid or p-toluenesulfonic acid.
8. A pharmaceutical composition comprising of a compound as set forth in claim 1 and pharmaceutically acceptable carrier.
9. An antitumor composition comprising of an effective
amount of a compound as set forth in claim 1 and
pharmaceutically acceptable carrier. A process for preparing 3-(substituted methyl)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one derivatives having the general formula I
Figure imgf000082_0001
when X is 0;
The said process comprising the reaction of compound having general formula II with substituted carboxylic acid in presence of base in solvent,
Figure imgf000082_0002
when X is NH;
The compound having general formula II was converted to amino by reaction with metal azide followed by reduction in presence of metal catalyst and the resulting amino compound was reacted with acid halide, acid anhydride or activated ester in presence of base in solvent, wherein R and X are same as defined as above and L is an appropriate leaving group.
PCT/GB1995/000024 1994-01-07 1995-01-06 Novel 3-(substituted methyl)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one derivatives useful as antitumor agents WO1995018807A1 (en)

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AU13250/95A AU678879B2 (en) 1994-01-07 1995-01-06 Novel 3-(substituted methyl)-4-oxa-1-azabicyclo{3.2.0}heptan-7-one derivatives useful as antitumor agents
US08/513,802 US5994342A (en) 1994-01-07 1995-01-06 3-(substituted methyl)-4-oxa-1-azabicyclo[3.2.0]heptan-7-one derivatives useful as antitumor agents
EP95904658A EP0688324A1 (en) 1994-01-07 1995-01-06 Novel 3-(substituted methyl)-4-oxa-1-azabicyclo 3.2.0]heptan-7-one derivatives useful as antitumor agents

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997032580A1 (en) * 1996-03-06 1997-09-12 Synphar Laboratories Inc. 3-substituted-4-oxa-1-azabicyclo[3,2,0]heptan-7-one as cysteine protease inhibitors
WO1997038008A1 (en) * 1996-04-10 1997-10-16 Synphar Laboratories Inc. 6-substituted amino-4-oxa-1-azabicyclo[3,2,0] heptan-7-one deriv atives as cysteine protease inhibitors

Citations (5)

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GB1515241A (en) * 1976-01-27 1978-06-21 Beecham Group Ltd Beta-lactam antibiotics
US4202819A (en) * 1979-05-04 1980-05-13 Hoffman-La Roche Inc. 2-(3-Alanyl)clavam antibiotic
GB1585661A (en) * 1976-06-08 1981-03-11 Glaxo Lab Ltd Clavam derivatives
DE3427651A1 (en) * 1983-07-29 1985-06-27 Ciba-Geigy Ag, Basel Clavam compounds
WO1994001109A1 (en) * 1992-07-09 1994-01-20 Taiho Pharmaceutical Co. Ltd. 4-oxa-1-azabicyclo [3,2,0] heptan-7-one derivatives as antitumor agents

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
GB1515241A (en) * 1976-01-27 1978-06-21 Beecham Group Ltd Beta-lactam antibiotics
GB1585661A (en) * 1976-06-08 1981-03-11 Glaxo Lab Ltd Clavam derivatives
US4202819A (en) * 1979-05-04 1980-05-13 Hoffman-La Roche Inc. 2-(3-Alanyl)clavam antibiotic
DE3427651A1 (en) * 1983-07-29 1985-06-27 Ciba-Geigy Ag, Basel Clavam compounds
WO1994001109A1 (en) * 1992-07-09 1994-01-20 Taiho Pharmaceutical Co. Ltd. 4-oxa-1-azabicyclo [3,2,0] heptan-7-one derivatives as antitumor agents

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997032580A1 (en) * 1996-03-06 1997-09-12 Synphar Laboratories Inc. 3-substituted-4-oxa-1-azabicyclo[3,2,0]heptan-7-one as cysteine protease inhibitors
US5925633A (en) * 1996-03-06 1999-07-20 Synphar Laboraties, Inc. 3-Substituted-4-oxa-1-azabicyclo 3,2,0!heptan-7-one as cysteine protease inhibitors
WO1997038008A1 (en) * 1996-04-10 1997-10-16 Synphar Laboratories Inc. 6-substituted amino-4-oxa-1-azabicyclo[3,2,0] heptan-7-one deriv atives as cysteine protease inhibitors
US5905076A (en) * 1996-04-10 1999-05-18 National Research Council Of Canada 6-substituted amino-4-oxa-1-azabicyclo 3,2,0! heptan-7-one derivatives as cysteine protease inhibitors

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