CuBr-Mediated Oxyalkylation of Vinylarenes under Aerobic Conditions via Cleavage of sp<sup>3</sup> C−H Bonds α to Oxygen
作者:Kai Cheng、Lehao Huang、Yuhong Zhang
DOI:10.1021/ol900947d
日期:2009.7.2
A novel difunctionalization reaction of vinylarenes with cyclic ethers has been developed by copper catalysis via direct activation of alpha-sp(3) C-H bonds of oxygen in the presence of 1-1.2 equiv of TBHP under mild aerobic conditions. The reaction shows excellent regioselectivities and good functional group tolerance to give the oxyalkylated products of vinylarenes.
Copper-catalyzed dehydrogenative cross-coupling reaction between unactivated ethers and simple ketones mediated by pyrrolidine
作者:Xing-Fen Huang、Zhi-Qiang Zhu、Zhi-Zhen Huang
DOI:10.1016/j.tet.2013.07.085
日期:2013.10
A copper-catalyzed dehydrogenative cross-coupling reaction between unactivated ethers and simpleketones mediated by pyrrolidine has been developed. Under the catalysis of CuBr2 and in the presence of pyrrolidine, either tetrahydrofuran 2a or tetrahydropyran 2b can react smoothly with a series of methyl aryl ketones 1a–m to give desired coupling products 3aa–mb using TBHP as an oxidant. The advantages