Convenient practical resolution of racemic alkyl-aryl alcohols via enzymatic acylation with succinic anhydride in organic solvents
摘要:
Enantiomerically pure alkyl-aryl secondary alcohols were conveniently obtained on a kilogram scale from their racemic mixtures by enzymatic acylation with succinic anhydride in organic solvents. A major advantage of this acylation method is the ease of separating the ester from the unreacted alcohol. This is achieved by extracting the organic solution with aqueous NaHCO3 after the enzymatic reaction is completed.
[EN] METHOD FOR PREPARING COAGULATION FACTOR XIA INHIBITOR AND INTERMEDIATE THEREOF<br/>[FR] PROCÉDÉ DE PRÉPARATION D'UN INHIBITEUR DU FACTEUR XIA DE COAGULATION ET INTERMÉDIAIRE DE CELUI-CI<br/>[ZH] 一种凝血因子XIa抑制剂及其中间体的制备方法
The unexpected esterase activity of an industrial glutaryl acylase was investigated. Glutaryl esters of a series of primary and secondary alcohols as well as of phenols were all efficiently hydrolyzed, the only exception being the sterically hindered glutarate of thymol. The enantioselectivities of the acylase, which were evaluated with three of these substrates, were quite low (E values ranging between 1.9 and 7.2), but were significantly improved by substrate and/or solvent engineering. Enantiomerically enriched hydrolyzed alcohols and unreacted glutarates can be easily separated by selective extraction, thus avoiding chromatographic steps. (C) 2005 Elsevier Ltd. All rights reserved.