Donor specificity and regioselectivity in Lipolase mediated acylations of methyl α-d-glucopyranoside by vinyl esters of phenolic acids and their analogues
作者:Mária Mastihubová、Vladimír Mastihuba
DOI:10.1016/j.bmcl.2013.07.051
日期:2013.10
Methylα-d-glucopyranoside as a model acceptor was acylated by several phenolic and non-phenolic vinyl esters using immobilised Lipolase. Donor specificity and regioselectivity of reaction were investigated. Conversion and rate of acylation by structurally varied donors indicates that the synthetic reactivity of Lipolase corresponds to the hydrolytic activity of feruloyl esterase type A. Lipolase exhibited
Reaction system was developed for enzymatic caffeoylation of model saccharidic acceptor methyl β-d-glucopyranoside to obtain exclusively methyl 6-O-caffeoyl-β-d-glucopyranoside. Reaction with starting concentration of acceptor 0.2 M provided 73% yield of purified product within 17 days. Reactions with low acceptor concentrations (0.04 and 0.08 M) run to the completion within 7 days. Such highly effective