Chemoenzymatic polymer-supported liquid phase synthesis of glucose γ-aminobutyric ester
摘要:
A concise, polymer-supported solution synthesis of 6-O-(gamma-aminobutyryl)-D-glucose has been achieved. Glucose was attached to polyethylene glycol monomethyl ether (MPEG) through an alpha,alpha'-dioxyxylyl diether linker, and, subsequently, the HO-6 hydroxyl of the glucose was regioselectively esterified with gamma-aminobutyric acid by a lipase-catalyzed reaction. (C) 2003 Elsevier Science Ltd. All rights reserved.
Chemoenzymatic polymer-supported liquid phase synthesis of glucose γ-aminobutyric ester
作者:Carmen de Torres、Alfonso Fernández-Mayoralas
DOI:10.1016/s0040-4039(03)00223-5
日期:2003.3
A concise, polymer-supported solution synthesis of 6-O-(gamma-aminobutyryl)-D-glucose has been achieved. Glucose was attached to polyethylene glycol monomethyl ether (MPEG) through an alpha,alpha'-dioxyxylyl diether linker, and, subsequently, the HO-6 hydroxyl of the glucose was regioselectively esterified with gamma-aminobutyric acid by a lipase-catalyzed reaction. (C) 2003 Elsevier Science Ltd. All rights reserved.
Enzymatic Removal of Carboxyl Protecting Groups. III. Fast Removal of Allyl and Chloroethyl Esters by <i>Bacillus subtilis</i> Esterase (BS2)
作者:Irene Fotakopoulou、Efrosini Barbayianni、Violetta Constantinou-Kokotou、Uwe T. Bornscheuer、George Kokotos
DOI:10.1021/jo061871f
日期:2007.2.1
esterase from Bacillus subtilis (BS2) allows the fast and selective removal of allyl, 2-chloroethyl, and 2,2,2-chloroethyl esters under mild conditions in high yields. In addition, BS2 easily hydrolyzes phenacyl esters, while the hydrolysis of sterically hindered diphenylmethyl esters is slow, requiring longer reaction time and higher enzyme/substrate ratio.