AIM: To optimize the asymmetric reduction of ethyl 4-chloro-3-oxobutanoate (COBE) to (S)-ethyl 4-chloro-3-hydroxybutanoate [(S)-CHBE] directly catalyzed by yeast (Saccharomyces cerevisiae) fermentation broth.

• 目的优化酵母发酵液直接催化4-氯乙酰乙酸乙酯(COBE)合成(S)-4-氯-3-羟基-丁酸乙酯((S)-CHBE)的反应条件.