Selective lipase-catalyzed 6-O-acylation of alkyl α-D-glucopyranosides using functionalized ethyl esters
作者:A. T. J. W. de Goede、W. Benckhuijsen、F. van Rantwijk、L. Maat、H. van Bekkum
DOI:10.1002/recl.19931121102
日期:——
Alkyl α-D-glucopyranosides were selectively converted into their 6-O-acyl esters by lipase-catalyzed transesterification with ethyl acrylate or ethyl 4-chlorobutanoate. Comparison of six lipase preparations showed large differences in activity and selectivity. The addition of zeolite CaA for selective adsorption of ethanol and water, exerted profound effects on conversion and regioselectivity of the
通过用丙烯酸乙酯或4-氯丁酸乙酯的脂肪酶催化的酯交换反应,将烷基α-D-吡喃葡萄糖苷选择性地转化为其6- O-酰基酯。六种脂肪酶制剂的比较显示活性和选择性差异很大。添加CaA沸石以选择性吸附乙醇和水,对酯交换反应的转化率和区域选择性产生了深远的影响。在沸石CaA存在下,使用来自南极衣藻的脂肪酶实现了高选择性的定量转化。