Synthesis and antibacterial activities of new 1 beta-methylcarbapenems having a 1,3-diazabicyclo[3.3.0]octan-2,4-dione moiety

Synthesis and biological activity of 1β-methyl-2-[5-(2-N-substituted aminoethylcarbamoyl)pyrrolidin-3-ylthio]carbapenem derivatives

The synthesis of a new series of 1beta-methylcarbapenems having the substituted aminoethylcarbamoylpyrrolidine moiety is described. Their in vitro antibacterial activities against both Gram-positive including MRSA and Gram-negative bacteria were tested and the effect of substituent on the pyrrolidine ring was investigated. In particular, the compound 11g having piperazinyl urea moiety showed the most potent antibacterial activity and 11k exhibited excellent anti-MRSA.

Synthesis and antibacterial activity of 1beta-methyl-2-(5-substituted thiazolo pyrrolidin-3-ylthio)carbapenem derivatives

The synthesis of a new series of 1beta-methylcarbapenems having the substituted thiazolopyrrolidine moiety is described. Their in vitro antibacterial activities against both Gram-positive including MRSA and Gram-negative bacteria were tested and the effect of substituent on the thiazole ring was investigated. A particular compound (28c) having 4'-amide substituted thiazole moiety showed the most potent antibacterial activity.