Preparation of chiral organochalcogeno-α-methylbenzyl alcohols via biocatalysis. The role of Daucus carota root
作者:João V. Comasseto、Álvaro T. Omori、André L.M. Porto、Leandro H. Andrade
DOI:10.1016/j.tetlet.2003.11.011
日期:2004.1
A series of organochalcogeno acetophenones 3 has been submitted to the action of enzymes from Daucus carota root. Some of the chalcogeno ketones tested afforded the chiral organochalcogeno-alpha-methylbenzyl alcohols 4 in excellent enantiomeric excesses (>99%), under mild and environmentally friendly conditions. The stereoselectivity of the reduction is in accordance with Prelog's rule. Enzymatic kinetic resolution as alternative process was used to obtain the chiral ortho-organochalcogeno-alpha-methylbenzyl alcohols in excellent enantiomeric excess (>99%). (C) 2003 Elsevier Ltd. All rights reserved.