organic photoredox-catalyzed dehydroxylative trifluoromethylation of allylic alcohols was developed in an environmentally benign manner. In this reaction, the readily available CF3SO2Na was selected as the trifluoromethylation reagent. The in situ generated byproduct SO2 was reutilized to activate C–OH bond, which enabled this dehydroxylative trifluoromethylation to be performed conveniently. A variety
以环境友好的方式开发了有机光氧化还原催化的烯丙醇脱羟基三氟甲基化。本反应选用易得的CF 3 SO 2 Na作为三氟甲基化试剂。在原位通过产品生成SO 2被再利用来激活C-OH键,这使此dehydroxylative三氟甲基化将被方便地进行。以高产率和优异的立体选择性获得了多种多功能化的 CF 3 -烯丙基化合物。
A highly efficient kinetic resolution of Morita–Baylis–Hillman adducts achieved by N–Ar axially chiral Pd-complexes catalyzed asymmetric allylation
作者:Feijun Wang、Shengke Li、Mingliang Qu、Mei-Xin Zhao、Lian-Jun Liu、Min Shi
DOI:10.1039/c1cc15543a
日期:——
Palladium complexes with an axially chiral NâAr framework have been developed. These complexes showed high stereoselectivities in asymmetric allylic arylation to achieve the kinetic resolution of MoritaâBaylisâHillman adducts, affording up to 99% ee of (E)-allylation products and 92% ee of recovered MoritaâBaylisâHillman adducts.