Iron-catalyzed direct α-arylation of ethers with azoles
作者:Arkaitz Correa、Béla Fiser、Enrique Gómez-Bengoa
DOI:10.1039/c5cc05005g
日期:——
The direct α-arylation of cyclic and acyclic ethers with azoles has been achieved, which features a novel iron-catalyzed cross-dehydrogenative coupling (CDC) process.
Direct C2-Alkylation of Azoles with Alcohols and Ethers through Dehydrogenative Cross-Coupling under Metal-Free Conditions
作者:Tao He、Lin Yu、Lei Zhang、Lei Wang、Min Wang
DOI:10.1021/ol201779n
日期:2011.10.7
metal-free novel, simple, and highly efficient method for the direct C2-alkylation of azoles with alcohols and ethers has been developed on the basis of an oxidative C–H activation process. The dehydrogenative C–C cross-coupling reactions of α-position sp3 C–H in alcohols and ethers with the 2-position sp2 C–H in azoles proceeded smoothly in the presence of tert-butyl hydroperoxide (TBHP) under neat reaction
The direct 2-alkylation of oxazoles and thiazoles with ethers through cross-dehydrogenative coupling reaction using Co-containing mesoporous zeolite ETS-10 as the heterogeneous catalyst is described. The basic Co-containing mesoporous zeolite ETS-10 catalyst facilitates this cross-dehydrogenative coupling reaction through metal-base synergy catalytic principle.
An efficient and complementary copper-catalyzed alkylation of (benzo)furans/(benzo)thiophenes with cyclic ethers was reported. A broad range of C2 heteroaryl-substituted cyclic ethers were obtained in moderate to good yields. The results of control experiments indicated that this transformation might proceed via a radical process.
Cobalt-Catalyzed Cross-Dehydrogenative Coupling Reactions of (Benz)oxazoles with Ethers
作者:Yanrong Li、Mengshi Wang、Wei Fan、Fen Qian、Guigen Li、Hongjian Lu
DOI:10.1021/acs.joc.6b02211
日期:2016.12.2
The cobalt-catalyzed cross-dehydrogenative coupling of (benz)oxazoles and ethers is described. Access to some important bioactive heteroaryl ether derivatives was achieved using CoCO3 as an inexpensive catalyst at levels as low as 1.0 mol %. Investigation of the mechanism indicates a catalytic cycle involving a radical process.