Rhodium-Catalyzed Highly Regioselective C-H Arylation of Imidazo[1,2-a]pyridines with Aryl Halides and Triflates
作者:Yi Liu、Lin He、Guoqiang Yin、Guojie Wu、Yingde Cui
DOI:10.5012/bkcs.2013.34.8.2340
日期:2013.8.20
Accepted May 13, 2013A convenient Rh-catalyzed C-H arylation of imidazo[1,2-a]pyridines with a variety of aryl halides or triflateshas been reported. This process afforded a range of biaryl compounds in excellent yields and showed highactivity and broad scope. Key Words : Rhodium catalyst, Aryl halides, Regioselective arylation, Imidazo[1,2- a]pyridines, TriflatesIntroductionHeteroaromatics bearing aryl-heteroaryl
Highly regioselective palladium-catalyzed direct cross-coupling of imidazo[1,2-a]pyridines with arylboronic acids
作者:Limin Zhao、Haiying Zhan、Jinqiang Liao、Jianping Huang、Qinlin Chen、Huifang Qiu、Hua Cao
DOI:10.1016/j.catcom.2014.06.028
日期:2014.11
A highly regioselective method for the palladium-catalyzed direct cross-coupling of imidazo[1,2-a]pyridines with arylboronic acids has been developed by using O-2 as oxidant. This process can be applied to a wide range of imidazo[1,2-a]pyridines and arylboronic acids with excellent C-3-regioselectivity. It provides a new way for developing C-C bond-forming processes of multisubstituted imidazo[1,2-a]pyridines, which are common structural motifs in natural products and pharmaceuticals. (C) 2014 Elsevier B.V. All rights reserved.