New β-lactam acetic acid derivatives I
wherein R represents alkyl, alkyl substituted with amino, I protected amino, mono- or di-alkylamino, hydroxy, I protected hydroxy or alkoxy, and alkenyl, and their salts are useful as intermediates for preparing 1-azabicyclo I [3.2.0]hept-2-ene antibiotics II
The process for preparing the (β-lactam acetic acid derivatives I as well as the overall process which starting from the acids I leads to the antibiotics II are also claimed.
新的β-内酰胺
乙酸衍
生物 I
其中 R 代表烷基、被
氨基、I 保护
氨基、单或双烷基
氨基、羟基、I 保护羟基或烷氧基取代的烷基和烯基,它们的盐可用作制备 1-
氮杂双环 I [3.2.0]hept-2-ene 抗生素 II 的中间体。
本发明还要求制备(β-内酰胺
乙酸衍
生物 I)的工艺,以及从酸 I 开始制备抗生素 II 的整个工艺。