In this study, a surface-modified solid support through the immobilization of sulfonic acid groups on magnetic nanoparticles (Fe3O4@SiO2@AE-SO3H). The structure of prepared hybrid nanostructure was characterized by various analyses. The catalytic activity of prepared hybrid nanomaterial was tested in the synthesis of tetrahydrobenzo[b]pyran and pyrano[2,3-d]pyrimidinone derivatives. High to excellent yields, short reaction times, green solvent and conditions, easy workup procedure, reusability without a significant diminish in catalytic efficiency and simple separation of nanocatalyst by using an external magnet alongside the environmental compatibility and sustainability, are some benefits of this method. Furthermore, high acidic content of the prepared nanostructure makes it a good candidate for other acid-catalyzed organic transformation.
