Zn/C-Catalyzed Cycloaddition of Azides and Aryl Alkynes

Charcoal impregnated with zinc was able to catalyze the cycloaddition of organic azides and alkynes to provide the corresponding 1,4-disubstituted 1,2,3-triazoles and 1,4,5-trisubstituted 1,2,3-triazoles in good to excellent yields. Note-worthy was that the novel and heterogeneous catalyst was successfully applied in this cycloaddition reaction for the first time and could also be easily recycled.