手性C 2 -对称 3,3'-二氨基甲基-联萘酚 ( AMB ) 是一种用于三取代丙烯腈不对称环氧化的有机催化剂。使用氢过氧化枯烯 (CHP) 作为氧化剂,3,3'-双(( R , R )-2-苯乙基氨基甲基)-( R )-联萘酚( AMB2 )在 - 30 °C 得到手性环氧化物作为单一非对映异构体,对映选择性范围为 15% ee 至 97% ee。
Organocatalytic Stereoselective Epoxidation of Trisubstituted Acrylonitriles
作者:Claudia De Fusco、Consiglia Tedesco、Alessandra Lattanzi
DOI:10.1021/jo102020a
日期:2011.1.21
The first diastereospecific and enantioselective epoxidation of trans-2-aroyl-3-arylacrylonitriles by means of the commercially available diaryl L-prolinol/tert-butyl hydroperoxide system has been developed. These diversely functionalized epoxides were obtained in excellent yield (up to 99%), complete diastereoselectivity for the transisomer, and good enantioselectivity (up to 84% ee). Highly enantioenriched epoxides can be easily obtained after a single crystallization (ee > 90%).