Tandem Amination/Cycloisomerization of Aryl Propargylic Alcohols with 2-Aminopyridines as an Expedient Route to Imidazo[1,2-a]pyridines
作者:Ping Liu、Chun-Lin Deng、Xinsheng Lei、Guo-qiang Lin
DOI:10.1002/ejoc.201101053
日期:2011.12
A new tandem route leading to imidazo[1,2-a]pyridines has been explored through the direct amination of aryl propargylic alcohols with 2-aminopyridines and their subsequent intramolecular cycloisomerization. A ZnCl2/CuCl system has been developed to promote this transformation, which resulted in various imidazo[1,2-a]pyridines in moderate to good yields.
通过芳基炔丙醇与 2-氨基吡啶的直接胺化及其随后的分子内环异构化,探索了一种导致咪唑并 [1,2-a] 吡啶的新串联路线。已开发出 ZnCl2 / CuCl 系统来促进这种转化,从而以中等至良好的产率生成各种咪唑并 [1,2-a] 吡啶。