Candida antarctica lipase B (CAL-B) was found to be a highly active biocatalyst for the direct acylation of the phenolic hydroxyls of substituted hydroquinones and resorcinols with vinyl propanoate as an acyl donor. The acylation reactions took place generally in a very regioselective manner. Especially in the case of 4-substituted resorcinols, the hydroxyl remote from the substituent was regiospecifically
Secondary alcohols act as better nucleophiles than primary alcohols in the lipase-catalyzed regioselective deacylation of dihydroxybenzenes acylated at both phenolic hydroxyls
Candida antarctica lipase B (CAL-B) was found to be highly regioselective as well as active in the deacylation of resorcinols and hydroquinones acylated at both phenolic hydroxyls. Contrary to expectation, secondary alcohols acted as better nucleophiles than primary alcohols in these enzymatic deacylations. (C) 2007 Elsevier Ltd. All rights reserved.
Hydrolytic reactions on polyphenolic perpropanoates by porcine pancreatic lipase immobilized in microemulsion-based gels
作者:Virinder S Parmar、Hari N Pati、Sunil K Sharma、Amarjit Singh、Sanjay Malhotra、Ajay Kumar、Kirpal S Bisht
DOI:10.1016/0960-894x(96)00411-8
日期:1996.10
Porcine pancreatic lipase (PPL) has been immobilized in microemulsion-based gels (MBGs). Highly selective and efficient deacylation of di/trihydric phenolic perpropanoates has been observed on incubating them with immobilized PPL. These reactions can find general utility in Synthetic Organic Chemistry. Copyright (C) 1996 Elsevier Science Ltd