Cu(I) nanoparticles immobilized onto Poly (Vinylpyridine-N-N-Methylenebisacrylamide-Acrylicacid) as a new, efficient and recyclable catalyst for the regioselective synthesis of ۱, ۲, ۳-Triazoles via click reaction in water

Poly (vinylpyridine-N-N-methylenebisacrylamide-acrylicacid) (۲-VP-MBAm-AA) was prepared from the reaction of TiO۲-methacryloxypropyltrimethoxysilane (TiO۲-MAPTMS) with ۲-vinylpyridine, methylenbisacrylamide (MBAm) and tert-butyl acrylate (t-BuA). Subsequently (۲-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 ۱, ۴-disubstituted ۱, ۲, ۳-triazoles in excellent yields. The catalyst can be recovered by simple filtration and reused for at least five runs without losing its efficiency.

Keywords:

Click reaction , Cu(I) nanoparticles , Heterogeneous catalysis , Regioselective , ۱ , ۲ , ۳-Triazoles