Cu(I) Schiff Base Complex Stabilized on Magnetic Graphene Oxide as a Recoverable Heterogeneous Catalyst for N-arylation of Amines Under Mild Conditions and With High Efficiency

N-aryl amines are crucial structural components in various biologically active compounds, synthesized primarily through copper-catalyzed Ullmann-type transformations. However, this method suffers from drawbacks such as prolonged reaction times, elevated temperatures, and limited functional group compatibility. To address these challenges, there has been a focus on developing efficient catalytic systems, with Schiff bases emerging as promising ligands due to their ease of synthesis and stability. This study introduces a novel approach by immobilizing a copper Schiff base complex onto graphene oxide decorated with Fe3O4 nanoparticles, resulting in a hybrid catalyst denoted as Hydrazonoindolin-2-one@GO/Fe3O4-Cu(I). Characterization confirmed the successful synthesis and surface functionalization of the catalyst, which exhibited high efficiency and selectivity in N-arylation reactions. Product identification was achieved through melting point determination and spectroscopic techniques. Overall, Hydrazonoindolin-2-one@GO/Fe3O4-Cu(I) presents a promising heterogeneous catalyst for N-arylation reactions, offering enhanced performance and recyclability.