Unusual lability of α-silyloxy β-amino carboxylic acid derivatives
作者:Michael N. Greco、H.Marlon Zhong、Bruce E. Maryanoff
DOI:10.1016/s0040-4039(98)00967-8
日期:1998.7
Saponification and mild acidification of alpha-silyloxy homo-arginine derivative 2c revealed an unusual lability of the silyl protecting group. A systematic study of related substrates indicates that hydrogen bonding between the alpha-amino hydrogen and the carbonyl oxygen is critical for facile desilylation. A mechanism involving neighboring group participation of NH and carboxyl groups is proposed. (C) 1998 Elsevier Science Ltd. All rights reserved.