Benzimidazolium Dihydrogen Phosphate: A Novel Green Catalyst for the Preparation of Pyrano[2,3-d]pyrimidines and Pyrano[3,2-c]chromenes in Aqueous Media
نویسندگان
1 Department of Organic Chemistry, Faculty of Chemistry, University of Guilan, Rasht, Iran
2 Department of Organic Chemistry, Faculty of Chemistry, University of Guilan, Rasht, Iran
3 Department of Organic Chemistry, Faculty of Chemistry, University of Guilan, Rasht, Iran
4 Department of Organic Chemistry, Faculty of Chemistry, University of Guilan, Rasht, Iran
5 Department of Organic Chemistry, Faculty of Chemistry, University of Guilan, Rasht, Iran
6 Department of Organic Chemistry, University Campus 2, University of Guilan, Rasht, Iran
doi
10.48309/chemm.2024.457715.1796چکیده
In this study, a novel benzimidazole-based Brönsted acidic ionic salt, benzimidazolium dihydrogen phosphate, was synthesized and characterized using Mass spectrometry, FT-IR and NMR spectroscopy, as well as ICP analysis. The salt demonstrated efficient catalytic properties and reusability in the production of pyrano[2,3-d]pyrimidine and pyrano[3,2-c]chromene derivatives. Noteworthy advantages of this approach include the minimal catalyst requirement, straightforward work-up process, brief reaction duration, high yields, and catalyst reusability for four consecutive uses without a significant decrease in efficiency.
