In this thesis, Initially, Fe3O4 MNPs were synthesized. Then, Fe3O4 MNPs were coated with 3-aminopropyltrimethoxysilane. Next, the Fe3O4-PTMS-Proline@Cu was synthesized from the reaction of Fe3O4-TMS MNPs with proline and then CuCl2. The synthesized nanocatalyst was characterized by FT-IR, EDX, SEM, XRD, TGA and VSM techniques. Activity of this nanocatalyst in the synthesis of aniline derivatives was studied. The advantages of this catalyst include high activity, easy separation, and the ability to recover it several times.