WO2003004666A2 - Procede de reduction enantioselectif d'une cetone aromatique prochirale comprenant au moins un groupe trifluoromethyle sur le cycle aromatique - Google Patents
Procede de reduction enantioselectif d'une cetone aromatique prochirale comprenant au moins un groupe trifluoromethyle sur le cycle aromatique Download PDFInfo
- Publication number
- WO2003004666A2 WO2003004666A2 PCT/FR2002/002251 FR0202251W WO03004666A2 WO 2003004666 A2 WO2003004666 A2 WO 2003004666A2 FR 0202251 W FR0202251 W FR 0202251W WO 03004666 A2 WO03004666 A2 WO 03004666A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- process according
- ketone compound
- enzyme
- lactobacillus
- reaction
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/02—Preparation of oxygen-containing organic compounds containing a hydroxy group
- C12P7/22—Preparation of oxygen-containing organic compounds containing a hydroxy group aromatic
Definitions
- the subject of the present invention is a method of enantioselective reduction of a prochiral aromatic ketone comprising at least one trifluoromethyl group on the aromatic ring, according to a biocatalysis or bioconversion method.
- optically active phenylalkanolic compounds and in particular (R) or (S -1-phenylethanol, are compounds widely used as synthons in the field of pharmacy and agrochemistry.
- the objective is to obtain the enantiomer having the desired property and to minimize the formation of the other enantiomer.
- the described method leading to an alcohol (S), the objective of the invention is to provide a desired optically active alcohol of configuration (R) according to a method of enantioselective reduction of the corresponding ketone.
- a method of enantioselective reduction of a prochiral aromatic ketone comprising at least one trifluoromethyl group on the aromatic cycle characterized in that the reduction is carried out in the presence of the enzyme from Lactobacillus.
- the preferred enzyme used according to the invention is the enzyme originating from Lactobacillus Kefiri.
- the method of the invention provides predominantly access to the alcohol of configuration (R).
- ketone compound denotes the starting substrate, namely, the prochiral aromatic ketone comprising at least one trifluoromethyl group on the aromatic cycle. According to the invention, the reduction is carried out in the presence of an enzyme of the alcohol dehydrogenase type.
- a first variant of the invention consists in using the isolated enzyme. Another variant of the invention is to bring into play a biomass comprising said enzyme.
- ketone compound corresponding to the general formula is used in the process of the invention:
- Ri represents an alkyl, alkenyl, cycloalkyl, aryl or arylalkyl group
- - n is a number at least equal to 1, preferably between 1 and 3, - at least one trifluoromethyl group is in position 3, 4 or 5.
- alkyl means a linear or branched hydrocarbon chain having from 1 to 15 carbon atoms and preferably from 1 or 2 to 10 carbon atoms.
- alkenyl is meant a hydrocarbon group, linear or branched having from 2 to 15 carbon atoms, comprising one or more double bonds, preferably 1 to 2 double bonds.
- cycloalkyl is meant a cyclic hydrocarbon group, comprising from 3 to 8 carbon atoms, preferably a cyclopentyl or cyclohexyl group.
- aryl is meant an aromatic mono- or polycyclic group, preferably mono- or bicyclic comprising from 6 to 12 carbon atoms, preferably phenyl or naphthyl.
- arylalkyl is meant a hydrocarbon group, linear or branched carrying a monocyclic aromatic ring and comprising from 7 to 12 carbon atoms, preferably benzyl.
- Ri represents an alkyl group having from 1 to 4 carbon atoms, preferably 1 or 2, - and n is a number equal to 1 or 2.
- the reduction is carried out by using preferentially, the enzyme originating from Lactobacillus Kefiri.
- the microorganism is a collection microorganism DSM20587.
- the reduction can be carried out in the presence of the isolated enzyme or of a biomass containing it.
- the enzyme is introduced into a buffered medium having a pH of around 7, preferably obtained with a phosphate buffer comprising 0.1 mol / l of mono- and dipotassium phosphate.
- a co-factor is added, namely, NADPH (nicotine-adenine-dinucleotide-phosphate).
- NADPH nicotine-adenine-dinucleotide-phosphate
- the final concentration of the co-factor in the final medium is preferably between 0.1 to 1 mmol / l.
- the co-factor which undergoes oxidation during the reaction is regenerated by conventional means such as, for example, the use of a secondary alcohol, preferably cyclopentanol or l isopropanol.
- the amount of alcohol used is in excess of the stoichiometry of the substrate. It is determined so that the concentration of alcohol in the medium is between 20 to 100 mmol / l.
- the ketone compound to be reduced is then introduced. It is implemented at a concentration advantageously between 5 to 20 mmol / l.
- the reaction is carried out at a temperature preferably between 30 ° C and 37 ° C.
- the reaction is carried out at atmospheric pressure and the reaction medium is preferably stirred.
- the medium is kept under stirring for a period which can be very variable. It is most often between 6 and 24 hours.
- the optically active alcohol obtained is separated in the usual way, for example, by carrying out an extraction using a suitable organic solvent such as, for example, dichloromethane, ethyl ether, ethyl acetate or any other suitable solvent.
- a suitable organic solvent such as, for example, dichloromethane, ethyl ether, ethyl acetate or any other suitable solvent.
- the enzyme contained in the cells of the microorganism is used.
- a first step in the process of the invention consists in carrying out the fermentation of the strain Lactobacillus Kefiri, in a conventional medium used to cultivate Lactobacilli.
- a second step is to carry out the reduction reaction in the presence of the biomass previously obtained.
- a fermentation medium comprising, for example, a carbon source, a nitrogen source and mineral salts.
- carbon sources mention may in particular be made of maltose, glucose, sucrose, lactose, glycerol, starch, sorbitol, mannitol, propylene glycol.
- yeast extracts beef extracts, peptone, ammonium sulphate, ammonium citrate, sodium nitrate or any other source of nitrogen containing amino acids.
- mineral salts can be added and in addition to those mentioned as a nitrogen source, there may be mentioned sodium acetate, magnesium sulfate, manganese sulfate or potassium phosphate. Reference will be made to the examples to illustrate the composition and the concentrations of the various constituents of the fermentation medium.
- Lactobacilli The cultivation of Lactobacilli is carried out anaerobically or pseudo-anaerobically and the skilled person knows how to conduct fermentation under these conditions. From a practical point of view, the fermentation medium is seeded with an inoculum of Lactobacillus, preferably Lactobacillus Kefiri which is present, most often in the form of an aqueous suspension which may contain a cryo-protective agent for example , dimethylsulfoxide or glycerol at a concentration, for example, from 10 to 20% by weight. Fermentation takes place at a pH advantageously between 6 and 7 and at a temperature preferably between 25 to 30 ° C.
- a cryo-protective agent for example , dimethylsulfoxide or glycerol
- the fermentation time is generally 2 to 4 days and is most often 3 days.
- the biomass is recovered in a conventional manner. For example, a centrifugation can be carried out for approximately 3 to 15 min, then the supernatant is removed by decantation and a pellet is recovered, which is most often washed with physiological water.
- the Lactobacillus biomass obtained is 1 to 5 g / l expressed in dry cells.
- the enantioselective reduction of the ketone compound is then carried out in the presence of the Lactobacillus biomass expressing the activity of alcohol dehydrogenase.
- the biomass is introduced in an amount of 10 to 30 g of dry matter per liter of reaction medium also comprising a buffer.
- a buffered medium having a pH of approximately 7 is chosen as above, preferably obtained with a phosphate buffer comprising 0.1 mol / l of mono- and dipotassium phosphate.
- the ketone compound to be reduced is then introduced. It is implemented at a concentration advantageously between 5 to 20 mmol / l.
- the reaction is carried out at a temperature advantageously between 30 ° C. and 37 ° C.
- the reaction is carried out at atmospheric pressure and the reaction medium is preferably stirred.
- the medium is kept under stirring for a period which can be very variable. It is most often between 6 and 24 hours.
- the biomass is separated in a conventional manner, for example by centrifugation.
- the supernatant comprising the optically active alcohol is recovered and separated, in a usual manner for example, by carrying out an extraction using a suitable organic solvent such as, for example, dichloromethane, ethyl ether, ethyl acetate or any other suitable solvent.
- a suitable organic solvent such as, for example, dichloromethane, ethyl ether, ethyl acetate or any other suitable solvent.
- the optically active alcohol can be obtained from a prochiral ketone with an excellent yield and a very high enantiomeric excess of up to 100%.
- the alcohol obtained mainly is of configuration (R).
- the strain Lactobacillus kefiri DSM20587 is cultivated in quasi-anaerobic static culture in the Man-Rogosa-Sharp medium (MRS) described below at 25 ° C, for 72 hours.
- MRS Man-Rogosa-Sharp medium
- the culture medium [MRS medium (Difco-0881)] has the following composition: - Peptone n ° 3 10 g
- the pH is 6.5.
- the medium is first of all sterilized in a conventional manner by heating in an autoclave at a temperature of 121 ° C., for 20 min.
- the medium (100 ml) is seeded with 0.1 ml of a cell suspension of Lactobacillus Kefiri socked in glycerol water (15% glycerol) and incubated for 72 hours at 25 ° C.
- the biomass obtained is 1.5 g / l expressed in dry cells.
- the cells obtained are washed with physiological water.
- BTA 3,5-bis (trifluoromethyl) acetophenone
- the enantiomeric excess ee expressed in% which is the ratio between [(R) - (S)] and [(R) + (S)] x 100, is determined by gas chromatography (GPC) on the chiral column Chiralsil Dex CB: 100 ° C to 160 ° C with a speed of 2 ° C per min.
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- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Zoology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Microbiology (AREA)
- General Chemical & Material Sciences (AREA)
- Biotechnology (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02758523A EP1409704A2 (fr) | 2001-07-02 | 2002-06-28 | Procede de reduction enantioselectif d'une cetone aromatique prochirale comprenant au moins un groupe trifluoromethyle sur le cycle aromatique |
JP2003510824A JP2004533269A (ja) | 2001-07-02 | 2002-06-28 | 芳香環上に少なくとも1個のトリフルオロメチル基を含むプロキラル芳香族ケトンのエナンチオ選択的還元法 |
CA002452263A CA2452263A1 (fr) | 2001-07-02 | 2002-06-28 | Procede de reduction enantioselectif d'une cetone aromatique prochirale comprenant au moins un groupe trifluoromethyle sur le cycle aromatique |
AU2002324106A AU2002324106A1 (en) | 2001-07-02 | 2002-06-28 | Method for the enantioselective reduction of a prochiral aromatic ketone comprising at least one trifluoromethyl group on the aromatic cycle |
US10/482,317 US20040191880A1 (en) | 2001-07-02 | 2002-06-28 | Method for the enentioselective reduction of a prochiral aromatic ketone comprising at least one trifluoromethyl group on the aromatic cycle |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0108742A FR2826650A1 (fr) | 2001-07-02 | 2001-07-02 | Procede de reduction enantioselectif d'une cetone aromatique prochirale comprenant au moins un groupe trifluoromethyle sur le cycle aromatique |
FR01/08742 | 2001-07-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003004666A2 true WO2003004666A2 (fr) | 2003-01-16 |
WO2003004666A3 WO2003004666A3 (fr) | 2004-02-19 |
Family
ID=8865018
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2002/002251 WO2003004666A2 (fr) | 2001-07-02 | 2002-06-28 | Procede de reduction enantioselectif d'une cetone aromatique prochirale comprenant au moins un groupe trifluoromethyle sur le cycle aromatique |
Country Status (7)
Country | Link |
---|---|
US (1) | US20040191880A1 (fr) |
EP (1) | EP1409704A2 (fr) |
JP (1) | JP2004533269A (fr) |
AU (1) | AU2002324106A1 (fr) |
CA (1) | CA2452263A1 (fr) |
FR (1) | FR2826650A1 (fr) |
WO (1) | WO2003004666A2 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1828391A2 (fr) * | 2004-12-16 | 2007-09-05 | Merck & Co., Inc. | Procede de synthese du (s)-1-(3,5-bis(trifluoromethyl)-phenyl)ethan-1-ole |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0456107A2 (fr) * | 1990-05-07 | 1991-11-13 | Forschungszentrum Jülich Gmbh | Procédé enzymatique de réduction de composés oxygénés, en particulier l'acétophénone et l'enzyme pour cela |
-
2001
- 2001-07-02 FR FR0108742A patent/FR2826650A1/fr not_active Withdrawn
-
2002
- 2002-06-28 JP JP2003510824A patent/JP2004533269A/ja not_active Withdrawn
- 2002-06-28 EP EP02758523A patent/EP1409704A2/fr not_active Withdrawn
- 2002-06-28 US US10/482,317 patent/US20040191880A1/en not_active Abandoned
- 2002-06-28 AU AU2002324106A patent/AU2002324106A1/en not_active Abandoned
- 2002-06-28 CA CA002452263A patent/CA2452263A1/fr not_active Abandoned
- 2002-06-28 WO PCT/FR2002/002251 patent/WO2003004666A2/fr not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0456107A2 (fr) * | 1990-05-07 | 1991-11-13 | Forschungszentrum Jülich Gmbh | Procédé enzymatique de réduction de composés oxygénés, en particulier l'acétophénone et l'enzyme pour cela |
Non-Patent Citations (3)
Title |
---|
BRADSHAW C W ET AL: "LACTOBACILLUS KEFIR ALCOHOL DEHYDROGENASE: A USEFUL CATALYST FOR SYNTHESIS" JOURNAL OF ORGANIC CHEMISTRY, AMERICAN CHEMICAL SOCIETY. EASTON, US, vol. 57, no. 5, 28 février 1992 (1992-02-28), pages 1532-1536, XP000676600 ISSN: 0022-3263 * |
HAGE, A. ET AL: "Asymmetric reduction of ketones via whole cell bioconversions and transfe hydrogenation: complementary approaches" TETRAHEDRON: ASYMMETRY, vol. 12, no. 7, 8 mai 2001 (2001-05-08), page 1025-1034 XP002248235 * |
NAKAMURA K ET AL: "Asymmetric reduction of ketones by the acetone powder of Geotrichum candidum" JOURNAL OF ORGANIC CHEMISTRY, AMERICAN CHEMICAL SOCIETY. EASTON, US, vol. 63, no. 24, 27 novembre 1998 (1998-11-27), pages 8957-8964, XP002157672 ISSN: 0022-3263 cité dans la demande * |
Also Published As
Publication number | Publication date |
---|---|
US20040191880A1 (en) | 2004-09-30 |
WO2003004666A3 (fr) | 2004-02-19 |
CA2452263A1 (fr) | 2003-01-16 |
EP1409704A2 (fr) | 2004-04-21 |
FR2826650A1 (fr) | 2003-01-03 |
JP2004533269A (ja) | 2004-11-04 |
AU2002324106A1 (en) | 2003-01-21 |
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