Asymmetric Trisubstituted Aziridination of Aldimines and Ketimines using N-α-Diazoacyl Camphorsultams
作者:Takuya Hashimoto、Hiroki Nakatsu、Kumiko Yamamoto、Shogo Watanabe、Keiji Maruoka
DOI:10.1002/asia.201000604
日期:2011.2.1
The acid‐catalyzed reaction of diazoacetates and aldimines (Brookhart–Templeton aziridination) is now recognized as a reliable method to provide enantiomerically enriched disubstituted aziridines, thus owing to the development of asymmetric catalysis. However, the extension of this method to prepare trisubstituted aziridines has not been explored to date, even for racemic products. In this context
现已认识到重氮乙酸盐和醛亚胺的酸催化反应(布鲁克哈特-特姆普尔顿叠氮化)是提供对映异构体富集的二取代氮丙啶的可靠方法,因此由于发展了不对称催化作用。然而,迄今为止,甚至对于外消旋产品,尚未探索将该方法扩展为制备三取代氮丙啶的方法。在这种情况下,考虑到它们的综合重要性以及缺乏替代的直接合成方法,我们最近启动了一个程序来实现这一未满足的挑战。本文中,我们报告了一项详细的研究,该研究以N -α-重氮酰基樟脑为主要成分,从而为各种三取代的氮丙啶建立了高度立体选择性的合成方法。