研究了非水有机溶剂体系中脂肪酶不对称转酯化拆分(R,S)-α-苯乙醇反应,比较了15种不同微生物来源的脂肪酶,从中优选出催化活性及对映选择性较高的脂肪酶Lipase PS,系统考察了影响该酶催化不对称转酯化反应的关键因素,获得了优化的催化拆分工艺条件.结果表明,脂肪酶Lipase PS在非水反应体系中,以正己烷为反应介质,初始水活度为0.75,底物苯乙醇和乙酸乙烯酯浓度分别为0.3和0.6 mol/L,加酶量5 mg/ml,35℃,200 r/min,反应14h后,底物(R,S)-α-苯乙醇的转化率达44.7％,产物(R)-乙酸苯乙酯的光学纯度达98.6％.水活度可影响酶对底物的转化率和对映选择性.
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