Enzymatic production of (S)-3-cyano-5-methylhexanoic acid ethyl ester with high substrate loading by immobilized Pseudomonas cepacia lipase
作者:Ren-Chao Zheng、Ai-Peng Li、Zhe-Ming Wu、Jian-Yong Zheng、Yu-Guo Zheng
DOI:10.1016/j.tetasy.2012.10.011
日期:2012.12
acid ethyl ester is a valuable synthetic intermediate for pregabalin. Immobilized lipase PS from Pseudomonas cepacia was screened and shown to be the best biocatalyst for the enantioselective hydrolysis of 3-cyano-5-methylhexanoic acid ethyl ester, a racemic mixture involving a β-stereocenter. The optimum temperature and pH for the biocatalytic process were 35 °C and 6.0, respectively. Lipase PS IM exhibited
(S)-3-氰基-5-甲基己酸乙酯是普瑞巴林的有价值的合成中间体。筛选了洋葱假单胞菌的固定化脂肪酶PS ,显示其是3-氰基-5-甲基己酸乙酯(一种涉及β-立体中心的外消旋混合物)的对映选择性水解的最佳生物催化剂。生物催化过程的最佳温度和pH分别为35°C和6.0。脂肪酶PS IM对高达2.0 M(366 g / l)的高底物浓度表现出很强的耐受性。在按比例放大的生物转化中,以0.89 M(162.9 g / l),99.2%ee和44.5%的产率生产(S)-3-氰基-5-甲基己酸乙酯。这些结果表明脂肪酶PS IM催化了(S)-3-氰基-5-甲基己酸乙酯,可作为大规模生产普瑞巴林的有效途径。