A Short-Step Synthesis of Orally Active Carbapenem Antibiotic CS-834.
作者:Makoto MORI、Sadao OIDA
DOI:10.1248/cpb.48.126
日期:——
An orally bioavailable carbapenem CS-834, which is a pivaloyloxymethyl (POM) ester-type prodrug and has (R)-5-oxopyrrolidin-3-ylthio moiety at the C-2 position of the 1β-methylcarbapenem skeleton, is currently under clinical trial. We accomplished a short-step synthesis of CS-834 by using phosphorus ylide from the intramolecular Wittig-type reaction in the key step for cyclization to the bicyclic carbapenem system. The POM ester group was found to be suitable for the cyclization conditions.
一种口服生物利用度高的碳青霉烯类药物CS-834,是一种特戊酰氧甲基(POM)酯型前药,其1β-甲基碳青霉烯骨架的C-2位上具有(R)-5-氧吡咯烷-3-硫基团,目前正在进行临床试验。我们通过关键步骤中的分子内Wittig型反应生成磷叶立德,成功实现了CS-834的短步骤合成,从而实现了对双环碳青霉烯系统的环化。研究发现,POM酯基团非常适合环化条件。