Facile Synthesis of 5‐Benzylidene Rhodamine Derivatives under Microwave Irradiation

Abstract

A series of 5‐benzylidenerhodamine derivatives were synthesized by the cross‐aldol condensation of an aromatic aldehyde with rhodamine or rhodamine acetic acid in sodium acetate/acetic acid under microwave irradiation. The reaction was completed in 8–20 min with 63–94% yields and was environmentally benign with easy workup.

Keywords:

• Aromatic aldehyde
• benzylidenerhodamine
• microwave irradiation
• rhodamine
• rhodamine acetic acid

Acknowledgment

We thank the National Natural Science Foundation of China (No. 20571029) and Jiangsu Key Laboratory for Chemistry of Low‐Dimensional Materials for financial support.