化工学报 ›› 2009, Vol. 60 ›› Issue (2): 421-427.

• 生物化学工程与技术 • 上一篇    下一篇

固定化CGMCC No.2266生物转化法制备(S)-(-)-β-羟基苯丙酸乙酯

欧志敏;杨根生;郭钫元   

  1. 浙江工业大学药学院
  • 出版日期:2009-02-05 发布日期:2009-02-05

Preparation of(S)-(-)-β-hydroxy-benzenepropanoic acid ethyl ester by asymmetric reduction of β-carbonyl phenylpropionate with immobilized CGMCC No.2266

OU Zhimin;YANG Gensheng;GUO Fangyuan   

  • Online:2009-02-05 Published:2009-02-05

摘要:

在邻苯二甲酸二丁酯中采用固定化酿酒酵母CGMCC No.2266不对称还原β-羰基苯丙酸乙酯制备(S)-(-)-β-羟基苯丙酸乙酯。将干重为430 mg的100 ml菌液50℃预热处理30 min,以2%海藻酸钠固定化得到的直径为2 mm的固定化细胞增殖培养72 h,在300 ml邻苯二甲酸二丁酯中转化17.2 mmol·L-1β-羰基苯丙酸乙酯,摩尔产率和对映体过剩值可以分别达到92.2%和100%。固定化细胞可以较好地重复利用于转化反应10次。产率随底物浓度的增高而降低,分批加入底物可以降低底物浓度过高对反应过程的抑制。

关键词:

CGMCC No.2266, 不对称还原, (S)-(-)-β-羟基苯丙酸乙酯

Abstract: ((S)-(-)-β-hydroxy-benzenepropanoic acid ethyl ester was synthesized by asymmetric reduction of β-carbonyl phenylpropionate with immobilized CGMCC No.2266 in dibutyl phthalate.100 ml microbial liquor containing 430 mg(dry weight)biomass preheated at 50℃ for 30 min was immobilized.After re-culturing for 72 h,the immobilized cells of 2 mm diameter prepared by 2% sodium alginate was used to reduce 17.2 mmol·L-1 β-carbonyl phenylpropionate in 300 ml dibutyl phthalate.The yield and enantiomeric excess of(S)-(-)-β-hydroxy-benzenepropanoic acid ethyl ester reached 92.2% and 100% respectively.Immobilized CGMCC No.2266 can be reused in reaction for ten times.The yield decreased with increasing substrate concentration.Batch addition of substrate can reduce inhibition of high concentration substrate.

Key words:

CGMCC No.2266, 不对称还原, (S)-(-)-β-羟基苯丙酸乙酯