Microbial deracemization of α-substituted carboxylic acids: control of the reaction path
作者:Dai-ichiro Kato、Kenji Miyamoto、Hiromichi Ohta
DOI:10.1016/j.tetasy.2004.06.049
日期:2004.9
A novel approach to preparing optically active alpha-substituted carboxylic acids using the whole cells of Nocardia diaphanozonaria JCM 3208 is described. When 2-phenylthiopropanoic acid and 2-methyl-3-phenylpropanoic acid were subjected to the reaction under aerobic conditions, the oxidation reaction proceeded preferentially rather than deracemization of these substrates. Herein, we report the design of reaction conditions to increase the deracemization activity in preference to oxidation reactions. In addition, we have successfully detected a metabolic intermediate in the reaction mixture of 2-methyl-3-plienylpropanoic acid, which indicates that the deracemization is a competitive reaction against the beta-oxidation pathway of fatty acid metabolism. (C) 2004 Elsevier Ltd. All rights reserved.