Synthesis of (−)-PNU-286607 by Asymmetric Cyclization of Alkylidene Barbiturates
作者:J. Craig Ruble、Alexander R. Hurd、Timothy A. Johnson、Debra A. Sherry、Michael R. Barbachyn、Peter L. Toogood、Gordon L. Bundy、David R. Graber、Gregg M. Kamilar
DOI:10.1021/ja808014h
日期:2009.3.25
member of a promising, novelclass of antibacterial agents that act by inhibiting bacterial DNA gyrase, a target of clinical significance. Importantly, PNU-286607 displays little cross-resistance with marketed antibacterial agents and is active against methicillin-resistant staphylococcus aureus (MRSA) and fluoroquinoline-resistant bacterial strains. Despite the apparent stereochemical complexity of this
PNU-286607 是一类有前途的新型抗菌剂的第一个成员,该类抗菌剂通过抑制细菌 DNA 促旋酶(具有临床意义的靶标)起作用。重要的是,PNU-286607 与市售抗菌剂几乎没有交叉耐药性,并且对耐甲氧西林金黄色葡萄球菌 (MRSA) 和耐氟喹啉细菌菌株具有活性。尽管这种独特的螺环巴比妥酸化合物具有明显的立体化学复杂性,但外消旋核心可通过采用相对模糊的乙烯基苯胺重排的两步路线获得,在文献中称为“叔氨基效应”。在对外消旋反应的立体化学过程进行全面研究后,从内消旋顺式二甲基吗啉开始,开发了该过程的实用不对称变体。