Practical and Highly Selective Sulfur Ylide Mediated Asymmetric Epoxidations and Aziridinations Using an Inexpensive, Readily Available Chiral Sulfide. Applications to the Synthesis of Quinine and Quinidine
作者:Ona Illa、Muhammad Arshad、Abel Ros、Eoghan M. McGarrigle、Varinder K. Aggarwal
DOI:10.1021/ja9100276
日期:2010.2.17
one-step synthesis of a chiral sulfide which exhibits outstanding selectivities in sulfur ylide mediated asymmetric epoxidations and aziridinations. In particular reactions of benzyl and allylic sulfonium salts with both aromatic and aliphatic aldehydes gave epoxides with perfect enantioselectivities and the highest diastereoselectivities reported to date. In addition reactions with imines gave aziridines
用最容易获得的同手性分子之一(柠檬烯)加热一种最丰富的天然无机化学物质(元素硫),可以一步合成手性硫化物,该硫化物在硫叶立德介导的不对称环氧化和氮丙啶化反应中表现出出色的选择性。特别是苄基和烯丙基锍盐与芳香族和脂肪族醛的反应产生具有完美对映选择性和迄今为止报道的最高非对映选择性的环氧化物。此外,与亚胺的反应再次得到具有迄今为止报道的最高对映选择性和非对映选择性的氮丙啶。该反应是可扩展的,并且硫化物可以高产率地重新分离。