Synthesis and Antibacterial Activities of New 1β‐Methylcarbapenems Having a 1,3‐Diazabicyclo[3.3.0]octan‐2,4‐dione Moiety

Abstract
The synthesis of a new series of 1β‐methylcarbapenems having a 1,3‐diazabicyclo[3.3.0]octane‐2,4‐dione moiety is described. Their in vitro antibacterial activities against both Gram‐positive and Gram‐negative bateria are determined and the effect of substituent on the bicyclic ring as well as stereoisomerism was investigated.