Efficient recyclable Cu-catalysts for click reaction and Chan-Lam coupling based on copolymers of N-vinylimidazole with N-vinylcaprolactam

A new catalytic system based on copper supported on poly(N-vinylimidazole-co-N-vinylcaprolactam) was investigated. Various compositions of copolymers were checked to compare their influence on the catalytic activity. Copolymer with 25 mol% of N-vinylimidazole and 75 mol% of N-vinylcaprolactam showed the best catalytic efficiency along with its recycling ability in the click reaction and Chan-Lam coupling.