摘要:
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.