N-杂环卡宾-钯(ii)-1-甲基咪唑配合物催化咪唑并[1,2- a ]吡啶与芳基氯的直接CH键芳基化†
摘要:
我们在本文中报道了N-杂环卡宾-钯(II)-1-甲基咪唑配合物催化的咪唑并[1,2- a ]吡啶与芳基氯化物直接进行CH键芳构化。在合适的条件下,各种咪唑并[1,2- a ]吡啶与芳基氯化物之间的所有反应均能很好地产生所需的C3-H芳基化产物,并且收率高,从而为直接的C-H键提供了一种方便且可替代的方法使用经济且容易获得的芳基氯化物作为芳基化试剂,使咪唑并[1,2- a ]吡啶进行芳基化。
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.