Acidic Ionic Liquid [H-NP]HSO₄ Promoted One-Pot Synthesis of Dihydro-1H-Indeno[1,2-b]pyridines and Polysubstituted Imidazoles

Abstract

This research reports a green and efficient protocol for the one-pot synthesis of dihydro-1H-indeno[1,2-b]pyridines and polysubstituted imidazoles using a recyclable acidic ionic liquid [H-NP]HSO₄ (H-NPBS). Non-corrosiveness, safe, low waste, generality, simplicity, easy for separation, short reaction times, high yields and environmentally benign are some of the advantages of this methodology. The [H-NP]HSO₄ (H-NPBS) has been effectively recycled for six consecutive cycles without appreciable loss in its activity.

Keywords:

• Acidic ionic liquid [H-NP]HSO₄ (H-NPBS)
• dihydro-1H-indeno[1,2-b]pyridines
• green chemistry
• polysubstituted imidazoles

Acknowledgments

The authors thank the Research Council of University of Mazandaran and Hakim Sabzevari University for partial support of this work.

Disclosure statement

No potential conflict of interest was reported by the authors.