2-Substituted-2,4-endo-dimethyl-8-oxabicyclo[3.2.1]octan-3-ones as catalysts for the asymmetric epoxidation of some alkenes with Oxone<sup>®</sup>
作者:Solange Klein、Stanley M. Roberts
DOI:10.1039/b205946k
日期:——
A range of 2-substituted-2,4-dimethyl-8-oxabicyclo[3.2.1]octan-3-ones 13–18 are available in four steps and in states of high optical purity. The fluoroketone 18 was shown to be a catalyst for the asymmetric epoxidation of stilbene, (E)-methylstilbene, phenylstilbene and chalcone (59–68% ee at 24–67% conversion) using Oxone® as the primary oxidant.
一系列2-取代的2,4-二甲基-8-氧双环[3.2.1]八烯-3-酮13-18可以通过四步反应获得,且具有高光学纯度。氟酮18被证明是苯乙烯、(E)-甲基苯乙烯、苯基苯乙烯和查尔酮的不对称环氧化反应的催化剂(在24-67%转化率下,ee为59-68%),使用Oxone®作为主要氧化剂。