Phosphine-Free Palladium-Catalyzed Direct Arylation of Imidazo[1,2-a]pyridines with Aryl Bromides at Low Catalyst Loading
作者:Hai Yan Fu、Lu Chen、Henri Doucet
DOI:10.1021/jo300528b
日期:2012.5.4
Ligand-free Pd(OAc)2 was found to catalyze very efficiently the direct arylation of imidazo[1,2-a]pyridines at C3 under very low catalyst concentration. The reaction can be performed employing as little as 0.1–0.01 mol % catalyst with electron-deficient and some electron-excessive aryl bromides.
发现无配体的Pd(OAc)2可在非常低的催化剂浓度下非常有效地催化咪唑并[1,2-a]吡啶在C3上的直接芳基化。该反应可使用低至0.1-0.01 mol%的催化剂,缺电子和某些电子过量的芳基溴化物来进行。