Influence of the position of the substituent on the efficiency of lipase-mediated resolutions of 3-aryl alkanoic acids
作者:Rebecca E. Deasy、Thomas S. Moody、Anita R. Maguire
DOI:10.1016/j.tetasy.2013.09.019
日期:2013.12
prepared in 96% ee by Pseudomonas fluorescens catalysed ester hydrolysis, while, Candida antarctica lipase B (immob) resolved the α-ethyl substituted 3-arylalkanoic acid (R)-1b in 82% ee. The influence of the position of the substituent relative to the ester site on the efficiency and enantioselectivity of the biotransformation is also explored; the same lipases were found to resolve both the α- and β-substituted
描述了水解酶催化的动力学拆分,以提供对映体富集的α-取代的3-芳基链烷酸。(小号)-2-甲基-3-苯基丙酸(小号) - 1A是通过在96%ee的制备荧光假单胞菌催化酯水解,同时,南极假丝酵母脂肪酶B(immob)解决了α -乙基取代的3-芳基链烷酸(R)-1b在82%ee中。还探讨了取代基相对于酯位的位置对生物转化效率和对映选择性的影响。发现相同的脂肪酶可分解α-和β-取代的链烷酸。此外,讨论了相对于其C3取代的对应物,C2立体发生中心的取代基的空间效率和立体选择性。