A Great Improvement of the Enantioselectivity of Lipase-Catalyzed Hydrolysis and Esterification Using Co-Solvents as an Additive
作者:Tomohiro Nishigaki、Yoshitaka Yasufuku、Sayuri Murakami、Yasuhito Ebara、Shin-ichi Ueji
DOI:10.1246/bcsj.81.617
日期:2008.5.15
improvement of the enantioselectivity of lipase-catalyzed hydrolysis of butyl 2-(4-substituted phenoxy)propanoates in an aqueous buffer solution. On the other hand, lipase lyophilized from an aqueous solution containing the co-solvents catalyzed highly enantioselective esterification of 2-(4-substituted phenoxy)propionic acids, 2-(4-isobutylphenyl)propionic acid (ibuprofen), and 2-(6-methoxy-2-naphthyl)propionic
添加共溶剂如四氢呋喃导致脂肪酶催化的 2-(4-取代苯氧基)丙酸丁酯在缓冲水溶液中水解的对映选择性大大提高。另一方面,从含有共溶剂的水溶液中冻干的脂肪酶催化 2-(4-取代苯氧基)丙酸、2-(4-异丁基苯基)丙酸(布洛芬)和 2-(6 -甲氧基-2-萘基)丙酸(萘普生)在有机溶剂中。对于某些底物,观察到 E 值增加了两个数量级。由共溶剂添加引起的对映选择性增强的起源主要归因于错误结合的对映异构体的初始反应速率显着减慢,与正确结合的对映体相比。从FT-IR、CD和ESR光谱的结果来看,还发现共溶剂的加入导致脂肪酶三级结构的部分破坏。