WO2004108698A1 - 環状乳酸オリゴマー2倍量体の製造方法 - Google Patents
環状乳酸オリゴマー2倍量体の製造方法 Download PDFInfo
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- WO2004108698A1 WO2004108698A1 PCT/JP2004/007695 JP2004007695W WO2004108698A1 WO 2004108698 A1 WO2004108698 A1 WO 2004108698A1 JP 2004007695 W JP2004007695 W JP 2004007695W WO 2004108698 A1 WO2004108698 A1 WO 2004108698A1
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- lactic acid
- group
- acid oligomer
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- cyclic lactic
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D323/00—Heterocyclic compounds containing more than two oxygen atoms as the only ring hetero atoms
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P3/00—Drugs for disorders of the metabolism
- A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
- A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/06—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
- C08G63/08—Lactones or lactides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- C08G63/81—Preparation processes using solvents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/91—Polymers modified by chemical after-treatment
- C08G63/912—Polymers modified by chemical after-treatment derived from hydroxycarboxylic acids
Definitions
- the present invention relates to a method for producing a cyclic lactic acid oligomer. More specifically, the present invention relates to a method for producing a cyclic lactic acid oligomer which is a dimer of the starting material from a linear lactic acid oligomer as a starting material.
- Cyclic lactic acid oligomers are expected to have pharmacological effects such as an anti-malignant tumor effect and a blood glucose lowering effect, and have recently been attracting attention as targets for drug development.
- Such cyclic lactic acid oligomers have heretofore been obtained as a mixture of cyclic lactic acid oligomers having various degrees of condensation (that is, different chain lengths) or as a mixture further containing a linear lactic acid oligomer.
- the present inventors have already proposed a method for producing a cyclic lactic acid oligomer containing no chain lactic acid oligomer (see Patent Documents 2 and 3). According to this method, it is possible to selectively obtain substantially only the cyclic lactic acid oligomer by selecting the type of the catalyst.
- the cyclic lactic acid oligomer obtained by this method was a mixture of cyclic lactic acid oligomers having a continuous chain length of 2, 3, 4,...
- Patent Document 1 JP-A-9-1227388
- Patent Document 2 WO 01 / 21613A1 pamphlet
- Patent Document 3 International Publication No. 01 / 21612A1 pamphlet
- Non-Patent Document l O. Kuisle, E. Quinoa, R. Riguera, J. Org. Chem., 1999, 64, P.8063
- An object of the present invention is to provide a method for producing a cyclic lactic acid oligomer having selectivity. More specifically, it is an object of the present invention to provide a method for producing a cyclic lactic acid oligomer capable of obtaining a cyclic lactic acid oligomer which is a dimer in a high yield in view of a chain lactic acid oligomer as a starting material.
- the present inventors have conducted intensive studies in view of the above-mentioned circumstances, and as a result, have found that a reaction product obtained by reacting a linear lactic acid oligomer with a carboxylic acid or a carboxylic acid derivative is converted into a reaction product under a specific temperature condition. It was found that a cyclic lactic acid oligomer mixture having a specific composition containing an overwhelming amount of cyclic lactic acid oligomer having twice the degree of condensation as compared to the starting linear lactic acid oligomer can be produced by the cyclization reaction. The invention has been completed.
- the present invention relates to the following matters.
- the method for producing a cyclic lactic acid oligomer 2 m-mer having 2 m structural units derived from lactic acid according to the present invention comprises:
- R'COX [where R 1 represents an optionally substituted aliphatic group, aryl group, or heterocyclic group; X is a hydroxyl group, a halogen atom, _OCOR 2 (R 2 is the same as R 1 Or an aliphatic group, an aryl group or a heterocyclic group, which may be substituted or different. ]
- reaction product is subjected to a cyclization reaction in an organic solvent at a temperature of 0 to 30 ° C. Is a special feature.
- the R 1 is a dichlorophenyl group, preferably a halogen-substituted phenyl group, more preferably a C 6-24 aryl group which may be substituted.
- the phenyl group is a trichloro mouth phenyl group.
- X is a halogen atom.
- the reaction (i) is preferably performed in the presence of a base, and the base is preferably a tertiary amine.
- the cyclization reaction (ii) is preferably performed in the presence of an aminopyridine.
- the organic solvent is preferably an aromatic hydrocarbon solvent.
- the compound used in the production method of the present invention or the resulting cyclic lactic acid oligomer is not particularly distinguished in stereoisomerism, and may be a mixture of isomers. Similarly, these compounds may be used in various forms such as metal salts (eg, sodium salt, potassium salt, magnesium salt, calcium salt, aluminum salt, zinc salt, etc.), hydrates, solvates, and polymorphs. Can be taken.
- metal salts eg, sodium salt, potassium salt, magnesium salt, calcium salt, aluminum salt, zinc salt, etc.
- hydrates, solvates, and polymorphs can be taken.
- a dimeric cyclic lactic acid oligomer 2m-mer can be selectively produced in view of the linear lactic acid oligomer m-mer as a starting material, It is possible to obtain a cyclic lactic acid oligomer mixture having a unique composition containing a large amount of oligomer 2m-mer.
- the cyclic lactic acid oligomer mixture contains a large amount of a dimeric cyclic lactic acid oligomer as viewed from the starting raw material of the chain lactic acid oligomer mi form. It is possible to selectively obtain a lactic acid oligomer in a high yield.
- the linear lactic acid oligomer m-mer used in the production method of the present invention is derived from lactic acid.
- m represents the number of structural units derived from lactic acid, and is usually 2 to 30, preferably 3 to 20, more preferably 3 to 15, still more preferably 3 to 10, and particularly preferably 3 to 10. — Represents the integer 6
- a method for producing a single linear lactic acid oligomer having such a specific chain length has already been proposed by the present inventors (Japanese Patent Application No. 2002-042009). According to this method, a linear lactic acid oligomer having a constant chain length between 3-20 mer can be directly synthesized as a single compound.
- a lactic acid oligomer having a protected hydroxyl group is reacted with a lactic acid or a lactic acid oligomer having a protected carboxy group, and, if necessary, protecting the hydroxyl group in the resulting lactic acid oligomer having a constant chain length.
- a single linear lactic acid oligomer having a specific chain length can be selectively deprotected by treating the group with hydrofluoric acid and treating the carboxyl-protecting group with trifluoroacetic acid / methylene chloride. Can be obtained.
- tert-butyldimethylsiloxylatatoyl lactic acid and ratatoyl lactic acid tert-lactic acid in the presence of 4-dimethylaminopyridine and N, N'-dicyclohexylcarbodiimide using methylene chloride as a solvent
- 4-dimethylaminopyridine and N, N'-dicyclohexylcarbodiimide using methylene chloride as a solvent
- lactic acid tetramer tert-butyl ester This is treated with hydrofluoric acid to obtain lactic acid tetramer tert-butyl ester, and the lactic acid tetramer tert-butyl ester is further treated with trifluoroacetic acid / methylene chloride to obtain linear lactic acid tetramer.
- a ligomer tetramer can be obtained.
- a linear lactate oligosaccharide desired as a starting material is used.
- the mer can be prepared directly.
- a cyclic oligomer of a dimer of a linear lactic acid oligomer as a starting material can be obtained. Therefore, the desired cyclic lactic acid oligomer to be finally obtained by the above method is obtained. It is preferable to prepare and use a linear lactic acid oligomer having a half degree of condensation.
- R 1 represents an optionally substituted aliphatic group, aryl group, or heterocyclic group
- X represents Hydroxyl group, halogen atom,-. . . ⁇ (Is the same as!
- the carboxylic acid or carboxylic acid derivative represented by the formula (1) reacts with the linear lactic acid oligomer m-mer to form an ester bond and provides —COR 1 to the carboxyl group terminal of the linear lactic acid oligomer m-mer
- carboxylic acid, acid halide and acid anhydride There is no particular limitation as long as it can be used, and it may be any of carboxylic acid, acid halide and acid anhydride.
- R 1 is a substituted, substituted or unsubstituted aliphatic group
- examples of the substituted or unsubstituted aliphatic group include a lower alkyl group and a lower alkenyl group. And a lower alkynyl group, a lower haloalkyl group, a lower alkoxy group, a lower alkoxyalkyl group, a lower alkoxycarbonyl group, a lower alkylthio group, a lower alkylsulfinyl group, and a lower alkylsulfonyl group.
- the number of carbon atoms of the aliphatic group is not particularly limited, it is usually 110, preferably 116, and more preferably 114.
- the chain type is not particularly limited, and may be any of a straight chain, a branched chain, a cyclic chain, and a combination thereof.
- the lower alkyl group includes a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a sec-butyl group and a tert-butyl group; A butyl group, a propenyl group, a butyryl group and the like (further, in the latter two groups, a group which is an isomer depending on the position of a double bond); a lower alkynyl group such as an ethur group or a propynyl group A lower cycloalkyl group such as a cyclopropyl group, a cyclobutyl group, a cyclopentyl group or a cyclopentyl group; Methoxyhexyl group, cycloheptyl group, cyclooctanyl group, etc .; lower haloalkyl groups include fluoro
- alkylthio groups include methylthio group, ethylthio group, propylthio group, butylthio group, and isomers thereof
- anoalkyl sulfier groups include methyl sulfyl group, ethyl sulfier group, and propyl sulfiel group.
- the optionally substituted aryl group is an aryl group having 6 to 24 carbon atoms, preferably 6 to 12 carbon atoms, and the aryl group has one or more substituents. Is also good. Specific examples of aryl groups include, for example, phenyl, trinole, naphthyl, benzyl, phenyl, phenoxy, mesityl, p-methoxyphenyl and the like.
- a substituted or unsubstituted heterocyclic group is a 5- to 10-membered saturated or unsaturated monocyclic ring containing at least one oxygen atom, nitrogen atom, sulfur atom or phosphorus atom. Alternatively, it is a functional group having a condensed ring.
- heterocyclic group examples include, for example, pyridinole, imidazolyl, quinolyl, isoquinolyl, pyrimidinyl, pyrazul, phthalazinyl, triazinyl, furyl, chenyl, pyrrolyl, oxazolyl, isoxazolyl Group, thiazolyl group, thiadiazolyl group, triazolyl group, benzimidazolyl group, pyrrolidino group, morpholino group, pyrazoporyl group and the like.
- These heterocyclic groups may have one or more substituents.
- Examples of the substituent which the aliphatic group, aryl group or heterocyclic group may have include, for example, a halogen atom (a fluorine atom, a chlorine atom, a bromine atom, an iodine atom), a cyano group, Nitro group, amino group, alkyl group, haloalkyl group, alkylthio group, alkylsulfel group, alkylsulfonyl group, asinole group, alkoxy group, alkoxyalkyl group, alkoxycarbonyl group, rubamoyl group, arylino group, aryloxy group, aryl Examples include a carbonyl group, an arylthio group, an arylsulfonyl group, a carbonamide group, an alkylsulfonamide group, an arylsulfonamide group, and a sulfamoyl group.
- a halogen atom a fluorine atom
- R 1 is preferably an aryl group having 6 to 24 carbon atoms which may be substituted, and is preferably an aryl group having 6 to 12 carbon atoms which may be substituted.
- Halogen-substituted phenyl groups which are more preferred, are even more preferred.
- halogen-substituted phenyl group examples include, for example, 2,6-dichlorophenyl group, 2,4,6_trichlorophenyl group, 4_odophenyl group, 2,4,6_tribromophenyl group And a dichlorophenyl group such as a 2,6-dichloromethyl phenyl group and a 2,4,6-trichloromethylphenyl group, or a trichloromethylphenyl group.
- R 2 may be the same as or different from R 1 Represents an aliphatic group, an aryl group, or a heterocyclic group which may be substituted; Examples of such an optionally substituted aliphatic group, aryl group, or heterocyclic group include those described above for R 1 .
- the carboxylic acid or carboxylic acid derivative used in the present invention is an acid halide wherein X is a halogen atom, since the lactic acid oligomer derivative can be obtained with good reactivity and high yield. It is preferable to use
- the acid halide may be an oxyfluoride, an acid chloride, an acid bromide, or an acid iodide.
- acid chloride acid Specifically, bromide is preferred, for example, 2,6-dicyclobenzoyl chloride, 2,4,6-trichlorobenzoyl chloride, 4_benzobenzoyl chloride, 2, 4, 6_tribromobenzoyl bromide and the like.
- dichloro or triclo benzoyl chlorides such as 2,6-dichloro benzoyl chloride and 2,4,6_triclo benzoyl chloride are preferred.
- Norrechloride is preferably used. These are used alone or in combination of two or more. ⁇ Production method of cyclic lactic acid oligomer 2m-mer >>
- the above-mentioned m-chain oligomer of lactic acid is reacted with a carboxylic acid or carboxylic acid derivative represented by R OX, preferably in the presence of a base.
- tertiary amines are preferred. Specific examples include triethylamine, triphenylenoleamine, getylisopropylamine, tribenzinoleamine, dimethylbenzinoleamine, and diisopropylethyl. Amine, triisopropylamine, triisobutylamine, triisooctylamine and the like. These may be used alone or in combination of two or more. Among these, diisopropylethylamine is more preferably used.
- the amount ratio when the linear lactic acid oligomer m-mer is reacted with the carboxylic acid or carboxylic acid derivative represented by R OX is not particularly limited, and is set in consideration of an equilibrium point, cost, and the like. Possible force
- the molar ratio (chain lactic acid oligomer m-mer: I ⁇ COX) is preferably 1: 0.7-1: 20, more preferably 1: 1-1: 1: 10.
- the acid halide is usually 115 equivalents, preferably 113 equivalents, more preferably 112, relative to the linear lactic acid oligomer m-mer. Used in 5 equivalent amounts.
- the tertiary amines are usually used in an amount of 1 to 30 equivalents, preferably 1 to 10 equivalents, more preferably 1 to 13 equivalents, based on the linear lactic acid oligomer m-mer. .
- the reaction is usually carried out at normal pressure, and the reaction temperature is usually 0 to 40 ° C., preferably 4 to 40 ° C., more preferably room temperature, and further in the presence of a suitable reaction solvent. It is desirable to be done in.
- the reaction solvent is not particularly limited as long as it can dissolve the reactant and is inert to the reaction.
- Specific examples of such a reaction solvent include ketone solvents such as acetone, methyl ethyl ketone, cyclopentanone and cyclohexanone; nitrile solvents such as acetonitrile; hydrocarbons such as hexane, benzene, toluene and xylene.
- Amide solvents such as ⁇ , ⁇ -dimethylformamide, ⁇ , ⁇ -dimethylacetamide, ⁇ -methyl-2_pyrrolidone; getyl ether, dimethoxyethane, methoxyethyl ether, tetrahydrofuran, 1,4 Ether solvents such as dioxane, 1,3-dioxane, bis [2- (methoxyethyl)] ether and bis [2- (methoxyethoxy) ethyl] ether; ester solvents such as ethyl acetate and butyl acetate; Dimethylsulfoxide, dimethylsulfone, snoreholane, 1-methynoley 2-pyrrolidino Examples thereof include 1,3-dimethinolein 2-imidazolidinone, tetramethinoleurea, phenol, chlorophenol, cresol, anisole, chloroform, dichloromethane, dichloroethylene,
- reaction time is not particularly limited, but is usually 2-20 hours, preferably 212 hours, from the viewpoint of production efficiency.
- the reaction product (mainly the intermediate) obtained in the reaction (i) is subjected to a cyclization reaction in an organic solvent at a temperature of 0 to 30 ° C.
- a cyclization reaction in an organic solvent at a temperature of 0 to 30 ° C.
- the cyclic lactic acid oligomer mixture obtained by the production method of the present invention is different from the conventional one, and is an aggregate of cyclic lactic acid oligomers having an integer multiple of the degree of condensation when viewed from the starting lactide oligomer m-mer. is there.
- the cyclic lactic acid obtained by the method of the present invention The oligomer mixture selectively contains a large amount of a dimeric cyclic lactic acid oligomer 2 m-mer in view of the starting material linear lactic acid oligomer m-mer and further contains a cyclic 3 m-mer, but contains a cyclic lm-mer. Or a mixture having a very specific composition containing little or no cyclic body of 4 m or more.
- the cyclization reaction is usually performed in an organic solvent at a temperature of 0 to 30 ° C, preferably 6 to 25 ° C, more preferably 10 to 25 ° C.
- a specific temperature range the formation of another cyclic body is suppressed, and a cyclic dimer is selectively produced.
- the organic solvent is not particularly limited as long as it is capable of dissolving the reactants and a reaction auxiliary agent described later, and is not particularly limited as long as it is an inert solvent for the reaction.
- aromatic hydrocarbon solvents are preferred in terms of suppressing the formation of impurities during the cyclization reaction.
- benzene, toluene, xylene, monochlorobenzene, dichlorobenzene, etc. Is mentioned. Of these, benzene and toluene are preferred. These solvents may be used alone or in combination of two or more.
- the cyclization reaction is carried out at a low temperature as described above in order to ensure the selectivity of the reaction, but it is preferable to use a reaction aid from the viewpoint of compensating for a decrease in the reactivity.
- a reaction assistant include aminoviridines, particularly 4-N, N-dimethylaminopyridine (hereinafter referred to as DMAP). Abbreviate. ) are preferred.
- the amount of DMAP used is 0.01 to 10 equivalents, preferably 115 equivalents, based on the linear lactic acid oligomer m-mer.
- the reaction pressure at the time of the cyclization reaction is not particularly limited, and may be usually normal pressure.
- an inert gas atmosphere such as a nitrogen gas or an argon gas can be used.
- the reaction time cannot be determined unequivocally, but it is generally effective for 124 hours, preferably 417 hours.
- the reaction (i) and the cyclization reaction (ii) described above can be usually performed as a continuous reaction without isolating the intermediate represented by the above formula (2) (lactic acid oligoester). it can.
- the cyclic lactic acid oligomer mixture produced by such a series of reactions can be easily subjected to ordinary separation means, for example, column chromatography, high performance liquid chromatography, etc., to easily form a cyclic lactic acid having a desired chain length.
- An oligomer single compound can be obtained in a pure state.
- the cyclic lactic acid oligomer mixture obtained by the production method of the present invention contains a large amount of a dimeric cyclic lactic acid oligomer as viewed from the chain lactic acid oligomer m-mer of the starting material. Therefore, it is possible to obtain the dimeric cyclic lactic acid oligomer in high yield.
- Each of the cyclic lactic acid oligomers contained in such a cyclic lactic acid oligomer mixture can be confirmed by the CI method (isobutane) by measuring the mass spectrum.
- FIG. 1 shows a mass spectrum chart of the obtained cyclic lactic acid oligomer mixture.
- FIG. 2 shows a mass spectrum chart of the obtained cyclic lactic acid oligomer mixture.
- FIG. 3 shows a mass spectrum chart of the obtained cyclic lactic acid oligomer mixture.
- FIG. 1 is a mass spectrum diagram of the cyclic lactic acid oligomer mixture obtained in Example 1.
- FIG. 2 is a mass spectrum diagram of the cyclic lactic acid oligomer mixture obtained in Example 2.
- FIG. 3 is a mass spectrum diagram of the cyclic lactic acid oligomer mixture obtained in Example 3.
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JP2003158247A JP2004359582A (ja) | 2003-06-03 | 2003-06-03 | 環状乳酸オリゴマー2倍量体の製造方法 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH04216822A (ja) * | 1990-02-21 | 1992-08-06 | Boehringer Ingelheim Kg | ヒドロキシカルボン酸に基づくポリエステルの製造方法 |
WO2001021613A1 (fr) * | 1999-09-20 | 2001-03-29 | Amato Pharmaceutical Products, Ltd. | Procede de preparation d'oligomeres cycliques d'acide lactique |
WO2001021612A1 (fr) * | 1999-09-20 | 2001-03-29 | Amato Pharmaceutical Products, Ltd. | Procede de preparation d'oligomeres cycliques d'acide lactique |
JP2002275256A (ja) * | 2001-03-19 | 2002-09-25 | Tendou Seiyaku Kk | 乳酸オリゴマーの製造方法 |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04216822A (ja) * | 1990-02-21 | 1992-08-06 | Boehringer Ingelheim Kg | ヒドロキシカルボン酸に基づくポリエステルの製造方法 |
WO2001021613A1 (fr) * | 1999-09-20 | 2001-03-29 | Amato Pharmaceutical Products, Ltd. | Procede de preparation d'oligomeres cycliques d'acide lactique |
WO2001021612A1 (fr) * | 1999-09-20 | 2001-03-29 | Amato Pharmaceutical Products, Ltd. | Procede de preparation d'oligomeres cycliques d'acide lactique |
JP2002275256A (ja) * | 2001-03-19 | 2002-09-25 | Tendou Seiyaku Kk | 乳酸オリゴマーの製造方法 |
Non-Patent Citations (1)
Title |
---|
KUISLE O. ET AL.: "A general methodology for automated solid-phase synthesis of depsides and depsipeptides. Preparation of a valinomycin analogue", J. ORG. CHEM., vol. 64, 1999, pages 8063 - 8075, XP002980967 * |
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JPH0570445A (ja) | オキサゾール類の製造方法 |
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