PENICILIN DERIVATIVES AND PROCESS FOR THEIR PREPARATION

摘要

PURPOSE:Isoanhydropenicillin derivs. I(R<1> is H; R<2> is H or acyl; R<1> together with R<2> forms dibasic carboxylic acid acyl gp.; A is H, alkoxy, acyloxy, carbamoyloxy or azide), e.g. 2R, 5R, 6R-2-(propene-2-yl)-6-phenylacetamido3,7-dioxo-4-thia-1-azaicyclo[3,2, 0Sheptane(benzylisoanhydropenicillin).