Abstract
1‐Phenyl‐3‐substituted‐2‐pyrazolinyl‐5‐carboxylates could be synthesized rapidly and regioselectively in good yield through the protocol of 1,3‐dipolar cycloaddition of polyethylene glycol supported acrylic acid with aldehyde phenylhydrazones under microwave irradiation.
Acknowledgment
We are grateful for the financial support of the Natural Science Fund of Zhejiang Province (202031).