Copolymer-Coated Magnetic Graphene Oxide: A Reusable Catalyst for the Preparation of 2,4,6-Triaryl Pyridines via Four-Component Reaction

Abstract

A magnetic nanocomposite based on graphene oxide was prepared. Fe₃O₄ nanoparticles were loaded on graphene oxide sheets and GO-Fe₃O₄ was covered by aniline-pyrrol copolymer to afford poly(Ani-co-Py)@GO-Fe₃O₄ nanocomposite. The poly(Ani-co-Py)@GO-Fe₃O₄ nanocomposite was characterized by FT-IR, TEM, VSM, TGA, XRD, and EDX techniques and applied in the synthesis of 2,4,6-triarylpyridines derivatives via four-component reaction of various benzaldehydes, acetophenones, and ammonium. The absence of solvent, high yields of products, short reaction times, mild reaction conditions, and easy work-up procedure in combination with non-toxicity, efficiency, high surface area, stability, cheapness, magnetic character, and reusability of the catalyst are noteworthy advantages of the present method.

Keywords:

• Copolymer-coated graphene oxide-Fe₃O₄
• 2,4,6-triaryl pyridine
• solvent-free condition
• multi-component reaction

Acknowledgments

Authors are thankful to the research Council department of chemistry of Hakim Sabzevari University and financial support for this work.

Disclosure statement

No potential conflict of interest was reported by the authors.