An expedient cyclopropanation of α-methylene-β-lactams with α-ketoesters mediated by P(NMe2)3 has been developed. This reaction enables rapid access to a series of functionalized spirocyclopropyl β-lactams in good yields from bench-stable starting materials under mild conditions. The experimental results indicated that the C3-substituent of the α-methylene-β-lactam not only significantly impacted the
已经开发了由P(NMe 2)3介导的具有α-
酮酸酯的方便的α-亚甲基-β-内酰胺的
环丙烷化反应。该反应使得可以在温和条件下从稳定的起始原料以高收率快速获得一系列官能化的螺环丙基β-内酰胺。实验结果表明,α-亚甲基-β-内酰胺的C3取代基不仅显着影响反应效率和立体
化学,而且在确定反应的
化学选择性方面起着关键作用。