Cl acts as a powerful and efficient solid acid catalyst for the preparation of arylbispyranylmethane derivatives under solvent free conditions

active acidic sites, high thermal stability with good selectivity, easy recyclability and reusability potential, high TON and TOF and also the eco-friendly nature of them. Therefore, due to the mentioned merits, great deal of chemist‘s attention has focused on the synthesis and applications of these versatile catalytic systems [1-2]. In this present, we would like to explore the application of imidazole-based ionic liquid-stabilized on silica coated Fe3O4 magnetic nano particles namely [nano-Fe3O4@SiO2@(CH2)3-Imidazole-SO3H]Cl as a heterogeneous core-shell catalystfor the preparation of arylbispyranylmethane derivatives under mild and eco-friendly conditions. The target molecules obtained with good to high yields in relatively short reaction times (Figure1).