作者:Kaoru Nakamura、Masamichi Kinoshita、Atsuyoshi Ohno
DOI:10.1016/s0040-4020(01)85007-9
日期:1994.4
Lipase-catalyzed transesterifications of cis- and trans-4-methylcyclohexanols with vinyl acetate in various organic solvents have been studied, and the effect of solvent on activity and stereoselectivity of lipase has been investigated. Initial rate of the reaction increases with the increase in hydrophobicity of the solvent exerting a good correlation with logP', a corrected index of logP. However
研究了在各种有机溶剂中脂肪酶催化的顺式和反式-4-甲基环己醇与乙酸乙烯酯的酯交换反应,并研究了溶剂对脂肪酶活性和立体选择性的影响。与在施加与记录中的良好的相关性的溶剂的疏水性的增加而增加,反应初始速率P”,日志的校正索引P。然而,由于立体选择性也受溶剂分子的影响,因此立体选择性因子γ和log P′之间的相关性很差。借助两参数关系,溶剂对立体选择性的影响与出色的线性相关。γ= a(ε[R - 1)/(2ε - [R + 1)+ b V米,其中ε - [R和V米分别表示介电常数和分别溶剂的摩尔体积。