Ruthenium-catalyzed direct C-3 oxidative olefination of imidazo[1,2-a]pyridines
作者:Haiying Zhan、Limin Zhao、Naiying Li、Longbin Chen、Jingyun Liu、Jinqiang Liao、Hua Cao
DOI:10.1039/c4ra04669b
日期:——
A highly regioselective oxidative olefination of imidazo[1,2-a]pyridines with acrylates has been accomplished in the presence of ruthenium catalysts to form only the C-3 coupling products. The oxidative olefination has provided step economical access to diverselysubstitutedimidazo[1,2-a]pyridine derivatives with excellent C-3 regioselectivity and E-stereoselectivity.
在钌催化剂的存在下,咪唑并[1,2- a ]吡啶与丙烯酸酯的高度区域选择性氧化烯化反应已经完成,仅形成C-3偶联产物。氧化烯化提供了经济地逐步获得具有优良C-3区域选择性和E-立体选择性的各种取代的咪唑并[1,2- a ]吡啶衍生物的步骤。