1,4 Butanesultone Functionalized Graphitic Carbon Nitride: Efficient Catalysts for the One-Pot Synthesis of 1,4-Dihydropyridine and Polyhydroquinoline Derivative through Hantzsch Reaction

Abstract

In this research, covalently linked sulfonic acid (SO₃H) modified g-C₃N₄ nanosheet (CNNs) catalysts was prepared. For this purpose, graphitic carbon nitride nanosheets (CNNs) were successfully synthesized. By the reaction of synthesized CNNs with 1,4-butane-sultone, CNNs-Bu-SO₃H organocatalyst was produced. The synthesized organocatalyst was characterized by FTIR, EDS, XRD, FESEM, and TGA analysis. The catalytic efficiency of the CNNs-Bu–SO₃H was explored for the synthesis of 1,4-dihydropyridine and polyhydroquinoline derivatives. The synthesized organocatalyst exhibits good thermal stability, high acidity and could be used up to five reaction cycles without a noticeable decrease in catalytic activity.

Keywords:

• Butanesultone
• 14-dihydropyridine
• graphitic carbon nitride nanosheet (CNNs)
• polyhydroquinoline derivative

Acknowledgments

We thank the Research Council of Iran University of Science and Technology (IUST), Tehran, Iran for their financial support. We also acknowledge the support of the Iranian Nanotechnology Initiative Council (INIC).

Disclosure statement

The authors declare that there is no conflict of interest.