Chemoenzymatic approaches to the dynamic kinetic asymmetric synthesis of aromatic amino acids
作者:Jennifer A. Chaplin、Michael D. Levin、Brian Morgan、Nancy Farid、Jen Li、Zuolin Zhu、Jeff McQuaid、Lawrence W. Nicholson、Cynthia A. Rand、Mark J. Burk
DOI:10.1016/j.tetasy.2004.07.060
日期:2004.9
Enzymatic approaches for the production of amino acids by nitrilases Lire described. Dynamic kinetic asymmetric synthesis conditions were established for the aromatic aminonitriles, phenylglycinonitrile and 4-fluorophenylglycinonitrile, at high pH to produce the corresponding amino acid products in high enantiomeric excess. N-Acylation of aromatic aminonitriles led to spontaneous racemization at pH 8, allowing preferential enzymatic hydrolysis of the (R)-enantiomer to afford the product N-acyl-amino acids in Lip to 99% enantiomeric excess (ee). (C) 2004 Elsevier Ltd. All rights reserved.