摘要：

A novel procedure for the generation of optically active ethyl 4-chloro-3-hydroxybutyrate using bacterial cells was developed. Ethyl (S)-4-chloro-3-hydroxybutyrate was prepared by Pseudomonas sp. OS-K-29, which stereoselectively assimilates 2,3-dichloro-1-propanol. The reaction was based on its kinetic dehalogenation for both enantiomers using the resting cells. The obtained 4-chloro-3-hydroxybutyrate had high enantiomeric excess of >98 % with a yield of 33 % at the microbial resolution step. Moreover, several C4 compounds having the 4-chloro-3-hydroxyl function were also resolved and gave good enantiomeric purities (>95 %ee). Ethyl (R)-4-chloro-3-hydroxybutyrate was also obtained with high enantiomeric purity (>98 %ee) using the cells of Pseudomonas sp DS-K-NR818.

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