Abstract
A series of asymmetric semicarbazides was synthesized by reactions of 2‐benzofuran isocyanate, which was prepared by Curtius rearrangement from 2‐benzofuroyl azide with acid hydrazide under microwave irradiation using a one‐pot procedure. Comparing to the conventional method, this method has the advantages of mild conditions, easy handling, and high yield.
Acknowledgment
We are thankful for the financial support from the Natural Science Foundation of Gansu Province (ZS021‐A25‐006‐Z) and the Scientific and Technological Innovation Engineering Program of Northwest Normal University (NWNU‐KJCXGC‐02‐08).