A convenient synthesis of N-benzyloxy-.BETA.-lactams via N-benzyloxyimines.
作者:Kiyoshi IKEDA、Kazuo ACHIWA、Minoru SEKIYA
DOI:10.1248/cpb.37.1179
日期:——
N-Benzyloxy-β-lactams were prepared from N-benzyloxyimines by reaction with ketene trimethylsilyl acetals in the presence of trimethylsilyl triflate followed by cyclization, or with lithium ester enolates in one step.