A. Forni et al., MICROBIAL SYNTHESIS OF (-)METHYL 4-CHLORO-4,4-DIFLUORO-3-HYDROXYBUTANOATE()METHYL AND (), Journal of molecular catalysis. A, Chemical, 107(1-3), 1996, pp. 405-407
Microbial reduction with baker's yeast or Aspergillus niger of methyl
4-chloro-4,4-difluoro-3-oxobutanoate 1 afforded the optically active m
ethyl(-)-4-chloro-4,4-difluoro-3-hydroxybutanoate 2. When yeast reduct
ion was carried out in the presence of allyl bromide the optically act
ive methyl (+)-4-chloro-4,4-difluoro-3-hydroxybutanoate 2 was obtained
.