Synthesis of pyrazoles from 2-azidoacrylates and hydrazonyl chlorides
作者:Yao Li、Deng Hong、Ping Lu、Yanguang Wang
DOI:10.1016/j.tetlet.2011.05.147
日期:2011.8
A regioselective synthesis of 1,3,4,5-tetrasubstituted pyrazoles is established between 2-azidoacrylates and hydrazonylchlorides in the presence of triethylamine. The yields are moderate (43–73%) and a possible mechanism for this transformation is postulated.