Ligand-Free, Copper-Catalyzed Ullmann-Type C–N Coupling: Regioselective Synthesis of Azole-Substituted Imidazo[1,2-a]pyridines
作者:Anil Kumar、Pinku Kaswan、Kasiviswanadharaju Pericherla
DOI:10.1055/s-0033-1339927
日期:——
A simple and highly efficient protocol for the regioselective synthesis of azole-substituted imidazo[1,2-a]pyridines has been developed using a ligand-free, copper-catalyzed Ullmann-type C–N coupling of 2-(2-bromophenyl)imidazo[1,2-a]pyridines with different azoles and in situ generated 1,2,3-triazoles. The reactions proceeded smoothly to furnish azolo-imidazo[1,2-a]pyridines in good to excellent yields
使用无配体、铜催化的 Ullmann 型 C-N 偶联 2-(2-溴苯基) 开发了一种简单高效的唑取代咪唑并 [1,2-a] 吡啶区域选择性合成方案咪唑并[1,2-a]吡啶与不同的唑并原位生成1,2,3-三唑。反应进行得很顺利,以良好到极好的产率(65-96%)提供了唑并咪唑并[1,2-a]吡啶。