Silica-coated magnetic NiFe2O4 nanoparticles-supported H14[NaP5W30O110] (NiFe2O4@SiO2-H14[NaP5W30O110]) was successfully synthesized and shown to be a versatile and highly efficient heterogeneous catalyst for one-pot multicomponent synthesis of 1,4-dihydropyridine derivatives under solvent-free condition. The synthesized catalyst can be magnetically recovered and reused four times without significant loss in catalytic efficiency
