A process for the preparation of a .beta.-lactam having the partial structure (I): ##STR1## wherein R.sub.1 is an acyl group, which process comprises treating an imine having the partial structure (II): ##STR2## with a nucleophilic derivative of formamide.
一种制备具有部分结构(I)的β-内酰胺的方法:其中R₁为酰基,该方法包括将具有部分结构(II)的
亚胺与甲酰胺的亲核衍
生物反应。