One-pot synthesis of [1,2,4]Triazolo[1,5-a]pyridines from azines and benzylidenemalononitriles via copper-catalyzed tandem cyclization
作者:Jianguang Lv、Zhiqing He、Jianmin Zhang、Yuwei Guo、Ziwei Han、Xinhua Bao
DOI:10.1016/j.tet.2018.06.002
日期:2018.7
A simple and efficient copper-catalyzed tandem radical cyclization reaction has been discovered for the synthesis of triaryl [1,2,4]triazolo[1,5-a]pyridines from easily accessible azines and benzylidenmalononitriles. The new transformation involves multiple CH/CC bonds cleavage and CC/CN bonds formation, with extrusion of gaseous hydrogen and methane. A wide variety of substrates with different functional
已经发现了一种简单有效的铜催化串联自由基环化反应,用于从易于获得的嗪和苄叉亚甲基腈合成三芳基[1,2,4]三唑并[1,5- a ]吡啶。新的转化涉及多个C H / C C键断裂和C C / C N键形成,以及气态氢和甲烷的挤出。可以将具有不同官能团的多种底物以良好的产率转化为相应的产物。稠合的杂环具有强烈的蓝色荧光,具有大的笔划位移和高的量子产率。