New .beta.-lactam acetic acid derivatives I ##STR1## wherein R represents alkyl, alkyl substituted with amino, protected amino, mono- or di-alkylamino, hydroxy, protected hydroxy or alkoxy, and alkenyl, and their salts are useful as intermediates for preparing 1-azabicyclo [3.2.0]hept-2-ene antibiotics II ##STR2## The process for preparing the .beta.-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.
New β-lactam antibiotics of the general formula
wherein R is (C1-C6)alkyl or (C3C6)alkenyl, n is zero or one and the stylized group
represents a mono- or polycyclic N-containing heterocyclic group, and their pharmaceutically acceptable salts and esters. Also described and claimed are the process for preparing the new compounds and the pharmaceutical compositions containing them.
通式如下的新型β-内酰胺类抗生素
其中 R 是(C1-C6)烷基或(C3C6)烯基,n 是 0 或 1,且定型基团
代表单环或多环含 N 杂环基团,以及它们的药学上可接受的盐和酯。本发明还描述了新化合物的制备过程以及含有这些化合物的药物组合物。
New beta-lactam acetic acid derivatives, the process for preparing them, and their use as intermediates for 1-azabicyclo(3.2.0.)hept-2-ene antibiotics