Effects of medium and of reaction conditions on the enantioselectivity of lipases in organic solvents and possible rationales
作者:Francesco Secundo、Sergio Riva、Giacomo Carrea
DOI:10.1016/s0957-4166(00)80206-2
日期:1992.1
The nature of organic solvents markedly influenced the enantioselectivity, expressed as the enantiomeric ratio, of porcine pancreatic lipase and of Lipase PS in transesterification between trifluoroethyl butanoate and the two unrelated alcohols (±)-sulcatol () and (±)-3-bromo-5-hydroxymethyl isoxazoline (). However, there was no correlation between enantioselectivity and such physicochemical characteristics
有机溶剂的性质显着影响猪胰脂肪酶和脂肪酶PS在三氟乙基丁酸酯与两种不相关的醇(±)-磺胺醇(± )和(±)-3-bromo- 5-羟甲基异恶唑啉()。但是,对映选择性和溶剂的物理化学特性如疏水性和介电常数之间没有相关性。提出了基于溶剂-酶复合物形成的基本原理来解释结果。酶的对映选择性也受温度影响,但不受酰化剂链长的影响,也不受分子筛从反应介质中除去水的影响。还研究了这些参数对酯交换率的影响。