Reusable 1,2,4-Triazolium Based Brønsted Acidic Room Temperature Ionic Liquids as Catalyst for Mannich Base Reaction

Unprecedented examples of 1-alkyl-1,2,4-tria- zolium methanesulfonate based Bronsted acidic room temperature ionic liquids were synthesized and character- ized. Their catalytic activity and efficiency in recyclability and reusability on one pot synthesis of halide substituted b- amino carbonyl compounds are reported.