| 摘要 |
New enantioselective reduction method of keto compounds (I) comprises the use of an alcohol dehydrogenase (ADH) in a two-phase water-solvent system. New enantioselective reduction method of keto compounds of formula (I) comprises incubating with alcohol dehydrogenase (ADH) in a two-phase system of water, co-factor and organic solvent with log P (octanol-water partition coefficient) = 0.5-4, and then recovering chiral hydroxy compound (II). R 1>-CO-R 2> (I) R 1>, R 2>hydrogen, 1-20C linear or branched alkyl, 2-20C linear or branched alkenyl or alkynyl, with 1-4 unsaturated bonds, 6-14C aryl, or 6-14C aryl(1-8C) alkyl; CO+R 1>+R 2>6-14C aryl or 5-14C heterocycle, and all residues are optionally substituted by 1-3 of hydroxy, halo, nitro, 1-20C alkoxycarbonyl (alkyl linear or branched, optionally substituted by 1-3 of halo, hydroxy, amino or nitro) or 5-14C heterocycle, optionally substituted by 1-3 of halo, hydroxy, amino or nitro. Independent claims are also included for: (1) Alcohol dehydrogenase (ADH') from Lactobacillus minor having a 264 amino acid sequence (X), reproduced; (2) DNA sequence encoding (X); (3) Escherichia coli mutant DSM 14196; (4) Production (M1) of ADH' by recombinant expression of the corresponding DNA in prokaryotic or eukaryotic microorganisms; and (5) Preparation (M2) of (S)-hydroxy compounds (II) by incubating the racemate with ADH in the specified two-phase system. |
