Enantioselective esterification of (RS)-2-(4-chlorophenoxy)propionic acid via Carica papaya lipase in organic solvents
作者:Yu-Chi Cheng、Shau-Wei Tsai
DOI:10.1016/j.tetasy.2004.05.036
日期:2004.9
the crude papain is found to be enantioselective for the kinetic resolution of (RS)-2-(4-chlorophenoxy)propionic acid via esterification in anhydrous organic solvents. Of the alcohols screened, trimethylsilylmethanol acted as the best acyl acceptor and gave the highest enzyme activity and enantioselectivity in anhydrous cyclohexane. The kinetic analysis at temperatures between 20 and 60 °C indicated
发现在粗木瓜蛋白酶中储存的番木瓜脂肪酶(CPL)对(RS)-2-(4-氯苯氧基)丙酸在无水有机溶剂中的酯化反应动力学拆分具有对映选择性。在所筛选的醇中,三甲基甲硅烷基甲醇是最佳的酰基受体,在无水环己烷中具有最高的酶活性和对映选择性。在20至60°C的温度下进行的动力学分析表明CPL具有热稳定性,在20°C时具有113的高E值。将环己烷改为其他疏水性溶剂可产生更好的脂肪酶性能。与其他粗制念珠菌脂肪酶番木瓜的性能比较 脂肪酶具有更高的活性,对映选择性和热稳定性。