Highly enantioselective monoalkylation of p-chlorobenzaldehyde imine of glycine tert-butyl ester under mild phase-transfer conditions
作者:Takashi Ooi、Yuichiro Arimura、Yukihiro Hiraiwa、Lin Ming Yuan、Taichi Kano、Toru Inoue、Jun Matsumoto、Keiji Maruoka
DOI:10.1016/j.tetasy.2006.01.019
日期:2006.2
The selective monoalkylation of glycine tert-butyl ester aldimine Schiff base 3 has been realized in high chemical yield with excellent enantioselectivity under mild liquid-liquid phase-transfer conditions by the use of binaphthyl-derived chiral quaternary ammonium bromides 7 and 8 as catalysts. This achievement demonstrates that 3 can be used as a cost-effective substrate for the preparation of optically active alpha-alkyl-alpha-amino, acid derivatives by chiral phase-transfer catalysis. (c) 2006 Elsevier Ltd. All rights reserved.