Enantioselective biotransformation of α,α-disubstituted dinitriles to the corresponding 2-cyanoacetamides using Rhodococcus sp. CGMCC 0497
摘要:
A new application of nitrile-converting enzymes in the synthesis of optically active alpha,alpha-disubstituted-alpha-cyanoacetamides from alpha,alpha-disubstituted-malononitriles with whole cells of Rhodococcus sp. CGMCC 0497 is described. The products were obtained with enantiomeric excesses of up to >99%, and yields of up to 53%. They are very useful chiral intermediates especially for the synthesis of chiral alpha,alpha-disubstituted amino acids but have never been synthesized directly by chemical or enzymatic methods. (C) 2003 Elsevier Ltd. All rights reserved.
New approaches to the asymmetric synthesis of α-methylphenylalanine
作者:Carlos Cativiela、Maria D. Diaz-de-Villegas、José A. Galvez
DOI:10.1016/s0957-4166(00)86182-0
日期:1994.1
A strategy of highly selective alkylation of chiral 2-cyanoesters followed by the corresponding degradation process allows a divergent asymmetric synthesis of (R) and (S)-alpha-methylphenylalanine.