convenient and mild route for the one-pot syntheses of N-aryl- and N-alkyltriazoles in water is reported. The methodology involves the three-component reaction comprising phenylacetylene, sodiumazide and aryl/alkyl halide catalyzed by Cu(I) species generated in situ by a redox reaction between FeCl 3 and copper metal. Prominent features of our methodology are in-corporation of aryl fluoride to generate