Cu(I) nanoparticles immobilized onto Poly (Vinylpyridine-N-N-Methylenebisacrylamide-Acrylicacid) as a new, efficient and recyclable catalyst for the regioselective synthesis of 1, 2, 3-Triazoles via click reaction in water

Poly (vinylpyridine-N-N-methylenebisacrylamide-acrylicacid) (2-VP-MBAm-AA) was prepared from the reaction of TiO2-methacryloxypropyltrimethoxysilane (TiO2-MAPTMS) with 2-vinylpyridine, methylenbisacrylamide (MBAm) and tert-butyl acrylate (t-BuA). Subsequently (2-VP-MBAm-AA) was reacted with CuI to give the Cu(I) NPs supported onto the above polymer. These immobilized nano-particles were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), FT-IR and inductively coupled plasma optical emission spectrometry (ICP-OES). This well characterized composite was examined as effective and reusable heterogeneous catalyst in water for the regioselective synthesis of 1, 4-disubstituted 1, 2, 3-triazoles in excellent yields. The catalyst can be recovered by simple filtration and reused for at least five runs without losing its efficiency.