Transition Metal-Mediated C═O and C═C Bond-Forming Reactions: A Regioselective Strategy for the Synthesis of Imidazo[1,2-<i>a</i>]pyridines and Imidazo[1,2-<i>a</i>]pyrazines
作者:Hua Cao、Xiaohang Liu、Jinqiang Liao、Jianping Huang、Huifang Qiu、Qinlin Chen、Yaoyi Chen
DOI:10.1021/jo501671x
日期:2014.11.21
A novel and convenient transformation for the regiospecific synthesis of functionalized imidazo[1,2-a]pyridine aldehydes/ketones and 3-vinyl imidazo[1,2-a]pyridines has been developed via copper(I)- and palladium(II)-catalyzed cyclization. The one-pot reaction proceeds smoothly with commercially available catalysts and affords the products in moderate to good yields. It represents an efficient approach
一种新颖的和便利的转化为官能化的咪唑并特异合成[1,2一]吡啶醛/酮和3-乙烯基咪唑并[1,2一]吡啶已经经由铜开发(I) -和钯(II) -催化环化。一锅法反应使用市售催化剂可顺利进行,并以中等至良好的收率提供产物。它代表在温和条件下形成C–N,C═O和C═C键的有效方法。