Cyclodimerization by ring-closing metathesis: synthesis, computational, and biological evaluation of novel bis-azetidinyl-macrocycles
作者:Aline Sliwa、Georges Dive、Jean-Louis Habib Jiwan、Jacqueline Marchand-Brynaert
DOI:10.1016/j.tet.2010.10.015
日期:2010.12
During our research on novel, non-traditional, bicyclic β-lactams as potential inhibitors of Penicillin Binding Proteins (PBPs), we focused on the synthesis of 1,3-bridged 2-azetidinones by RCM reaction from 1,3-bis-ω-alkenoyl-3(S)-amino-2-azetidinone precursors. Submitting the precursors to RCM, we faced an unexpected problem: cyclodimerization was the preferred outcome. This peculiar reactivity,
在我们研究新型,非传统的双环β-内酰胺类化合物作为青霉素结合蛋白(PBPs)的潜在抑制剂的过程中,我们专注于通过RCM反应由1,3-bis-ω合成1,3-桥联的2-氮杂环丁酮-链烯酰基-3(S)-氨基-2-氮杂环丁酮前体。将前体提交给RCM,我们遇到了一个意想不到的问题:环二聚是首选的结果。通过计算研究可以解释这种奇特的反应性,导致了前所未有的双氮杂环丁烷基大环化合物作为R39 D,D-羧肽酶(一种PBP的细菌模型酶)的有效抑制剂。