Nano Rice Husk Ash Modified with Acidic Ionic Liquid Bridge: An Efficient Promoter for the Synthesis of 1,2,4-Triazolo Quinazolinones

Abstract

In this study, a new heterogeneous catalyst was obtained easily and simply from the preparation and consolidation of bis-3-(trimethoxysilylpropyl)-ammonium hydrogen sulfate on nano rice husk ash [RHA-[bip]-NH₂⁺ HSO₄^–]. After identification this reagent using different techniques including FT-IR, XRD, FESEM, TEM, and TGA, its application as an efficient catalyst was investigated in the acceleration of the preparation of 1,2,4-triazolo quinazolinones. All reactions using this catalyst were performed under solvent-free conditions and all products were obtained in suitable times with high isolated yields without the formation of any by-products. Furthermore, the reusability of the catalyst was investigated during successive three runs.

Graphical Abstract

Keywords:

• Nano rice husk ash
• Ionic liquid bridge
• 124-triazolo quinazolinone
• Solvent-free conditions
• RHA-[bip]-NH₂ + HSO₄

Acknowledgments

The authors are thankful to the Research Council of the University of Guilan for the partial support of this research.

Disclosure statement

No potential conflict of interest was reported by the authors.