Copper-catalyzed four-component synthesis of imidazo[1,2-a]pyridines via sequential reductive amination, condensation, and cyclization
作者:Emad Allahabadi、Sina Ebrahimi、Mehdi Soheilizad、Mehdi Khoshneviszadeh、Mohammad Mahdavi
DOI:10.1016/j.tetlet.2016.11.081
日期:2017.1
A novel and efficient four-component approach for the synthesis of 2,3-disubstituted imidazo[1,2-a]pyridines is described. The copper-catalyzed reductive amination of 2-bromopyridine by sodium azide followed by sequential condensation and cyclization with aldehydes and isocyanides afforded the corresponding imidazo[1,2-a]pyridines in good yields.
描述了一种新颖有效的四组分合成2,3-二取代的咪唑并[1,2- a ]吡啶的方法。叠氮化钠经铜催化的2-溴吡啶的还原胺化反应,然后依次缩合并与醛和异氰酸酯环化,可得到相应的咪唑并[1,2- a ]吡啶。