EP1409704A2 - 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 aromatiqueInfo
- Publication number
- EP1409704A2 EP1409704A2 EP02758523A EP02758523A EP1409704A2 EP 1409704 A2 EP1409704 A2 EP 1409704A2 EP 02758523 A EP02758523 A EP 02758523A EP 02758523 A EP02758523 A EP 02758523A EP 1409704 A2 EP1409704 A2 EP 1409704A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- process according
- ketone compound
- enzyme
- lactobacillus
- reaction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 39
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 title claims abstract description 15
- 125000003118 aryl group Chemical group 0.000 title claims abstract description 11
- 150000008365 aromatic ketones Chemical class 0.000 title claims abstract description 7
- 108090000790 Enzymes Proteins 0.000 claims abstract description 19
- 102000004190 Enzymes Human genes 0.000 claims abstract description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 241000186660 Lactobacillus Species 0.000 claims abstract description 11
- 229940039696 lactobacillus Drugs 0.000 claims abstract description 9
- -1 ketone compound Chemical class 0.000 claims description 18
- 238000006722 reduction reaction Methods 0.000 claims description 16
- 239000002028 Biomass Substances 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000000855 fermentation Methods 0.000 claims description 11
- 230000004151 fermentation Effects 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 241001468191 Lactobacillus kefiri Species 0.000 claims description 8
- 125000004432 carbon atom Chemical group C* 0.000 claims description 8
- 125000000217 alkyl group Chemical group 0.000 claims description 5
- 239000003960 organic solvent Substances 0.000 claims description 5
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 4
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 125000003342 alkenyl group Chemical group 0.000 claims description 3
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- XCIXKGXIYUWCLL-UHFFFAOYSA-N cyclopentanol Chemical compound OC1CCCC1 XCIXKGXIYUWCLL-UHFFFAOYSA-N 0.000 claims description 2
- 239000002054 inoculum Substances 0.000 claims description 2
- 150000003333 secondary alcohols Chemical class 0.000 claims description 2
- XJLXINKUBYWONI-DQQFMEOOSA-N [[(2r,3r,4r,5r)-5-(6-aminopurin-9-yl)-3-hydroxy-4-phosphonooxyoxolan-2-yl]methoxy-hydroxyphosphoryl] [(2s,3r,4s,5s)-5-(3-carbamoylpyridin-1-ium-1-yl)-3,4-dihydroxyoxolan-2-yl]methyl phosphate Chemical compound NC(=O)C1=CC=C[N+]([C@@H]2[C@H]([C@@H](O)[C@H](COP([O-])(=O)OP(O)(=O)OC[C@@H]3[C@H]([C@@H](OP(O)(O)=O)[C@@H](O3)N3C4=NC=NC(N)=C4N=C3)O)O2)O)=C1 XJLXINKUBYWONI-DQQFMEOOSA-N 0.000 claims 1
- 229930027945 nicotinamide-adenine dinucleotide Natural products 0.000 claims 1
- 239000002609 medium Substances 0.000 description 13
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 9
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 9
- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- 102000007698 Alcohol dehydrogenase Human genes 0.000 description 3
- 108010021809 Alcohol dehydrogenase Proteins 0.000 description 3
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 3
- 229910000396 dipotassium phosphate Inorganic materials 0.000 description 3
- 235000019797 dipotassium phosphate Nutrition 0.000 description 3
- 125000001183 hydrocarbyl group Chemical group 0.000 description 3
- 150000002576 ketones Chemical class 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 239000008363 phosphate buffer Substances 0.000 description 3
- 239000012429 reaction media Substances 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- 239000001888 Peptone Substances 0.000 description 2
- 108010080698 Peptones Proteins 0.000 description 2
- 235000015278 beef Nutrition 0.000 description 2
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003480 eluent Substances 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 2
- 235000019341 magnesium sulphate Nutrition 0.000 description 2
- 229940099596 manganese sulfate Drugs 0.000 description 2
- 239000011702 manganese sulphate Substances 0.000 description 2
- 235000007079 manganese sulphate Nutrition 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 125000002950 monocyclic group Chemical group 0.000 description 2
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 2
- 235000019796 monopotassium phosphate Nutrition 0.000 description 2
- 235000019319 peptone Nutrition 0.000 description 2
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000600 sorbitol Substances 0.000 description 2
- 235000010356 sorbitol Nutrition 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000012138 yeast extract Substances 0.000 description 2
- WAPNOHKVXSQRPX-ZETCQYMHSA-N (S)-1-phenylethanol Chemical compound C[C@H](O)C1=CC=CC=C1 WAPNOHKVXSQRPX-ZETCQYMHSA-N 0.000 description 1
- MCYCSIKSZLARBD-UHFFFAOYSA-N 1-[3,5-bis(trifluoromethyl)phenyl]ethanone Chemical compound CC(=O)C1=CC(C(F)(F)F)=CC(C(F)(F)F)=C1 MCYCSIKSZLARBD-UHFFFAOYSA-N 0.000 description 1
- OWEGMIWEEQEYGQ-UHFFFAOYSA-N 100676-05-9 Natural products OC1C(O)C(O)C(CO)OC1OCC1C(O)C(O)C(O)C(OC2C(OC(O)C(O)C2O)CO)O1 OWEGMIWEEQEYGQ-UHFFFAOYSA-N 0.000 description 1
- GUBGYTABKSRVRQ-XLOQQCSPSA-N Alpha-Lactose Chemical compound O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@H]1O[C@@H]1[C@@H](CO)O[C@H](O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-XLOQQCSPSA-N 0.000 description 1
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 description 1
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- 244000168141 Geotrichum candidum Species 0.000 description 1
- 235000017388 Geotrichum candidum Nutrition 0.000 description 1
- 241001104455 Lactobacillus kefiri DSM 20587 = JCM 5818 Species 0.000 description 1
- GUBGYTABKSRVRQ-QKKXKWKRSA-N Lactose Natural products OC[C@H]1O[C@@H](O[C@H]2[C@H](O)[C@@H](O)C(O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@H]1O GUBGYTABKSRVRQ-QKKXKWKRSA-N 0.000 description 1
- GUBGYTABKSRVRQ-PICCSMPSSA-N Maltose Natural products O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@@H](CO)OC(O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-PICCSMPSSA-N 0.000 description 1
- 229930195725 Mannitol Natural products 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- 150000008062 acetophenones Chemical class 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 239000001166 ammonium sulphate Substances 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- GUBGYTABKSRVRQ-QUYVBRFLSA-N beta-maltose Chemical compound OC[C@H]1O[C@H](O[C@H]2[C@H](O)[C@@H](O)[C@H](O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@@H]1O GUBGYTABKSRVRQ-QUYVBRFLSA-N 0.000 description 1
- 125000002619 bicyclic group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 229940041514 candida albicans extract Drugs 0.000 description 1
- 239000006285 cell suspension Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000002577 cryoprotective agent Substances 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 238000010908 decantation Methods 0.000 description 1
- 239000008121 dextrose Substances 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 239000001963 growth medium Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000008101 lactose Substances 0.000 description 1
- 238000004811 liquid chromatography Methods 0.000 description 1
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
- 235000010355 mannitol Nutrition 0.000 description 1
- 239000006872 mrs medium Substances 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 1
- 229920000053 polysorbate 80 Polymers 0.000 description 1
- 229910000160 potassium phosphate Inorganic materials 0.000 description 1
- 235000011009 potassium phosphates Nutrition 0.000 description 1
- CMDGQTVYVAKDNA-UHFFFAOYSA-N propane-1,2,3-triol;hydrate Chemical compound O.OCC(O)CO CMDGQTVYVAKDNA-UHFFFAOYSA-N 0.000 description 1
- 235000013772 propylene glycol Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- YWYZEGXAUVWDED-UHFFFAOYSA-N triammonium citrate Chemical compound [NH4+].[NH4+].[NH4+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O YWYZEGXAUVWDED-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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.
Landscapes
- 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
Applications Claiming Priority (3)
| 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 |
| FR0108742 | 2001-07-02 | ||
| 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 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1409704A2 true EP1409704A2 (fr) | 2004-04-21 |
Family
ID=8865018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02758523A Withdrawn 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 |
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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4014573C1 (fr) * | 1990-05-07 | 1991-10-10 | Forschungszentrum Juelich Gmbh, 5170 Juelich, De |
-
2001
- 2001-07-02 FR FR0108742A patent/FR2826650A1/fr not_active Withdrawn
-
2002
- 2002-06-28 US US10/482,317 patent/US20040191880A1/en not_active Abandoned
- 2002-06-28 WO PCT/FR2002/002251 patent/WO2003004666A2/fr not_active Ceased
- 2002-06-28 CA CA002452263A patent/CA2452263A1/fr not_active Abandoned
- 2002-06-28 EP EP02758523A patent/EP1409704A2/fr not_active Withdrawn
- 2002-06-28 AU AU2002324106A patent/AU2002324106A1/en not_active Abandoned
- 2002-06-28 JP JP2003510824A patent/JP2004533269A/ja not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03004666A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004533269A (ja) | 2004-11-04 |
| FR2826650A1 (fr) | 2003-01-03 |
| AU2002324106A1 (en) | 2003-01-21 |
| CA2452263A1 (fr) | 2003-01-16 |
| WO2003004666A3 (fr) | 2004-02-19 |
| WO2003004666A2 (fr) | 2003-01-16 |
| US20040191880A1 (en) | 2004-09-30 |
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