Acylase I in the alcoholysis of α-substituted dicarboxylic acid esters and derivatives: enantio- and regioselectivity
作者:Arto Liljeblad、Jutta Lindborg、Liisa T Kanerva
DOI:10.1016/s0957-4166(00)00346-3
日期:2000.10
Enantio- and regioselective butanolyses of alpha -substituted dimethyl succinates (substituents: Me-, MeO2CCH2-, NH2-, AcHN-, PrCOHN-, HO-, MeO-, PrO-, AcO-, PrCO2-, HepCO(2)-, Cl- and Br-) and glutarates (substituents: PrCONH- and CbzNH-) and that of methyl pyroglutamate with acylase I enzymes have been studied. Acylase I-catalyzed reactions were totally regioselective proceeding exclusively at the sterically more hindered methyl ester group a to the substituent. High enantioselectivities (E from 50 to much greater than 100) were observed only for the substrates containing CONH functionality in the substituent although the C-N bond was unreactive. The nature of the substituent influenced which of the two enantiomers reacted faster. (C) 2000 Elsevier Science Ltd. All rights reserved.