Synthesis of benzo[]furo[2, 3-]phenazine derivatives through an efficient, rapid and via microwave irradiation under solvent-free conditions catalyzed by HPWO@FeO-ZnO for high-performance removal of methylene blue.

A rapid, one-pot synthesis of eight benzo[]furo[2,3-]phenazine derivatives has been achieved in moderate to good yields in good yields a multi-component of 2-hydroxynaphthalene-1,4-dione, arylglyoxal, indole (H, CH) in the presence of HPWO@FeO-ZnO magnetic core-shell nanoparticles (MCNPs) under solvent-free conditions using microwave irradiation. The catalyst was synthesised and characterised by X-ray diffraction, EDX, TEM, FESEM, TGA, VSM and atomic force microscope. As an application for the synthesised nanocatalyst, degradation of methylene blue as heavy-mass organic pollution was measured. These results showed advantages for synthesis, such as mild reaction conditions, low energy consumption and economically affordable.