Onepot threecomponent synthesis of tetrahydrobenzo[b]pyrans in the presence of Ni0.5Cu0.5Fe2O4 magnetic nanoparticles under microwave irradiation in solventfree conditions

N10.5Cu0.5Fe2O4 magnetic nanoparticles using Arabic gel (AG) as a reducing and stabilizing agent was prepared by the solmethod. The catalyst identification was performed using Fourier transform infrared spectroscopy (FTIR), powder Xray diffraction (PXRD), scanning electron microscopy (SEM), and vibrating sample magnetometer (VSM). The magnetic analysis showed that the Ni0.5Cu0.5Fe2O4 had a ferromagnetic behavior with a saturation magnetization of 31.22 emu/g at room temperature. Then, Ni0.5Cu0.5Fe2O4 magnetic nanoparticles were applied as a green, convenient, effective and reusable catalyst for the onepot threecomponent synthesis of tetrahydrobenzo[b]pyrans in good to excellent yields. It should be noted, the nanocatalyst is separated by a magnet was used several times and it was as efficient as ever.