Et3N-catalyzed direct cycloaddition reaction of allenoates with acceptor diazo compounds
作者:Yu-Ting Tian、Fa-Guang Zhang、Jun-An Ma
DOI:10.1016/j.tet.2021.131922
日期:2021.2
A Et3N-catalyzed [3 + 2] cycloadditionreaction of allenoates with acceptor diazo compounds that include diazoesters, diazoketones, and diazoamides, has been developed. This transformation allows direct and regioselective synthetic route to a variety of pyrazoles from allenoates. 3-Alkynoates also participate in the cycloadditionreaction by isomerizing to the corresponding allenoates in situ.