Copper(i)-catalyzed diastereoselective hydroxytrifluoromethylation of dienes accelerated by phosphine ligands
作者:Deng-Fu Lu、Cheng-Liang Zhu、Hao Xu
DOI:10.1039/c3sc50582k
日期:——
A diastereoselective 1,4-hydroxytrifluoromethylation of dienes is catalyzed by copper cyanide–phosphine complexes. This reaction is significantly accelerated by bulky monodentate phosphines, and the discovery enables expedient access to a variety of CF3-containing allylic alcohol derivatives.
Oxy-trifluoromethylation of di-substituted styrenes and dienes was achieved by using Cu/Togni's reagent system. Not only gem-di-substituted styrenes, but also a beta-methylstyrene derivative were transformed to the corresponding oxy-trifluoromethylation products. 1,4-Addition products were obtained selectively in the reaction of mono-substituted dienes. These reactions provide a new approach for the synthesis of beta-trifluoromethyl styrene derivatives. (C) 2014 The Authors. Published by Elsevier B.V.