Facile synthesis of alkyl β-benzyloxyaminocarboxyolates related to monocyclic β-lactams.
作者:Kiyoshi Ikeda、Kazuo Achiwa、Minoru Sekiya
DOI:10.1016/s0040-4039(00)86233-4
日期:1983.1
N-Benzyloxyimines have been shown to react with ketene silyl acetals in the presence of trimethylsilyl triflate catalyst to give alkyl β-benzyloxyaminocarboxylates. Conversion of them to β-lactams has been exemplified.
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.