organic base grafted on magnetic nanoparticles as a recoverable catalyst for the green synthesis of hydropyridine rings

Synthesis of 4-aminiquinaldine grafted on silica-coated nano-fe3o4 particles (mnps-aq) and their performance as a retrievable heterogeneous basic catalyst are disclosed. the catalytic performance of this novel material was studied for the green synthesis of substituted 1,4-dihydropyridine and polyhydroquinoline derivatives via one-pot multicomponent reactions. eco-friendly method, high yield and purity of the desired products, and short reaction time along with the ease of the work-up procedure outline the advantages of these new methodologies over the earlier ones. the surface and magnetic properties of the core/shell hybrid nanoparticles were characterized via tem, sem, xrd, eds, and ft-ir analysis techniques. this nanocatalyst is recyclable without any deterioration in its catalytic activity.