Sulfated tungstate a heterogeneous acid catalyst for synthesis of 4-aryl-NH-1,2,3-triazoles by 1,3-dipolar cycloaddition of nitroolefins with NaN₃

Abstract

A facile and new method for the synthesis of 4-aryl-NH-1,2,3-triazoles from nitroolefins and NaN₃ by 1,3-dipolar cycloaddition reaction, employing a mild solid inorganic acid sulfated tungstate as a heterogeneous catalyst, has been developed. The protocol emphasizes broad substrate scope with many functionalities, less reaction time, stability to open air, easy work-up, and with good to excellent yields.

Graphical Abstract

Keywords:

• 1,3-Dipolar cycloaddition
• heterogeneous catalysis
• nitrostyrenes
• sulfated tungstate
• 1,2,3-triazoles

Additional information

Funding

The authors thank the University Grant Commission, Delhi of India for financial support.