We have studied an ester prodrug of a carbapenem to develop a potent orally active β-lactam antibiotic. A variety of 1β-methylcarbapenem derivatives have been synthesized. We have found that some derivatives having an amide group in the C-2 side chain show potent and well balanced antibacterial activities as well as high stability against dehydropeptidase-I. Oral absorption of derivatives has been optimized by modifying the C-3 ester promoiety. Pivaloyloxymethyl (1R, 5S, 6S)-6-[(R)-1-hydroxyethyl]-1-methyl-2-[(R)-5-oxopyrrolidin-3-ylthio]-1-carbapen-2-em-3-carboxylate, CS-834, has been selected as the most promising compound for further evaluation.
我们研究了一种碳青霉烯
酯类前药,旨在开发一种强效的口服活性β-内酰胺抗生素。合成了一系列1β-甲基碳青霉烯衍
生物。我们发现,一些在C-2侧链中含有酰胺基团的衍
生物显示出强大的且平衡的抗菌活性,并且对脱
氨�酶-I具有高稳定性。通过修饰C-3酯的前体部分,优化了衍
生物的口服吸收。Pivaloyloxymethyl (1R, 5S, 6S)-6-[(R)-1-羟基乙基]-1-甲基-2-[(R)-5-氧代
吡咯烷-3-基
硫]-1-碳青霉烯-2-em-3-
羧酸酯,CS-834,已被选为最具前景的化合物进行进一步评估。