Copper Oxide Nanoparticles Supported on Ionic Liquid-Modified Magnetic Nanoparticles: A Novel Magnetically Recyclable Catalyst for the Synthesis of 3,4-Dihydropyrano[c]chromene Derivatives

Abstract

In this article, simple impregnation technique was used to prepare copper oxide nanoparticles supported on nanomagnetite modified with a poly ionic liquid (Fe₃O₄@IL@CuO-np). The nanoparticles were used in an environmentally friendly method as a novel heterogeneous catalyst in the synthesis of 3,4-dihydropyrano[c]chromenes. The results showed that the novel catalyst was very inexpensive and efficient in the reaction and at the end of the reaction, it could easily be separated using an external magnet and reused for other reactions without significant loss of its catalytic activity.

Graphical Abstract

Keywords:

• Cupric oxide
• dihydropyrano[c]chromenes
• external magnet
• heterogeneous catalyst
• impregnation technique
• magnetic nanoparticles

Acknowledgments

The authors wish to thank the Ahvaz Branch, Islamic Azad University for the financial support.