In this study, the magnetic Mg0.5Zn0.375Ni0.125Fe2O4 nanoparticle was prepared by the co-precipitation method and characterized with various methods, such as FT-IR, XRD, TGA, FESEM, EDX, and VSM. The catalytic activity of this magnetic nanocatalyst was perused in synthesizing dihydropyrano[2,3-c] pyrazole and tetrahydrodipyrazolopyridines derivatives. To indicate some of this paper’s preponderances, preparing a novel heterogeneous magnetic nanocatalyst with high reactivity produces high-yield and purity products. Moreover, the synthesized nanocatalyst has advantages such as high catalytic activity, non-toxicity, short reaction time, easy separation from the reaction mixture using an external magnet, and reusability several times without significant loss in its catalytic activity
