Three-component synthesis of 1,2,3-triazoles in the presence of PVC-supported triazole-copper complex by click reaction

In this research work novel PVC-supported triazole-copper(I) iodide catalyst (PVC–Triazole–CuI) was prepared and used the for synthesis of 1,2,3-triazoles. The catalyst was prepared in two steps; First PVC-N3 obtained from the reaction of NaN3 with PVC in water, then reaction of this compound with propargyl alcohol and copper(I)iodide in ethanol led to PVC-Triazole-CuI as the catalyst. The structure of the catalyst was characterized via different analytical tools, such as FT-IR, elemental analysis, ICP and SEM. This catalytic system was successfully applied for the three-component synthesis of 1,4-disubstituted 1,2,3-triazoles by the click reaction of terminal alkynes, sodium azide and organic halides. The advantages of this method are high reaction yield, short reaction time, and capability of recovering and reusing the catalyst. In addition, water, as a green medium, is used in the synthesis of 1,2,3-triazoles.