MgxCu0.3Zn0.7-xLayFe2-yO4 Magnetic Mixed Metal Oxide Nanocatalyst: Synthesis, Characterization and Application for One-Pot N-Heterocycle Synthesis

Abstract

The nano size Cu-Zn ferrite particles substituted to Mg2+ and La3+ having general chemical formula MgxCu0.3Zn0.7-xLayFe2-yO4 (x = 0.1, 0.2, 0.3, 0.4, 0.5; and y = 0.0, 0.025, 0.050, 0.075, 0.10) prepared through sol-gel method. The prepared mixed metal oxide nanoparticles were characterized employing techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM) analyses. The prepared MgxCu0.3Zn0.7-xLayFe2-yO4 magnetic nanoparticles were used as a efficient, recoverable and heterogeneous catalyst for the one-pot synthesis of quinoxalines 3(a–g) and 1,5-benzodiazepines 5(a–h) under mild reaction conditions in good yields. The recyclability of catalyst was tested for five times without significant decrease in the catalytic activity. Catalyst has been used for the synthesis of different derivatives of quinoxalines in short time (20 to 30 min) with 90 -97% yield. Also, different derivatives of 1,5-benzodiazepines have been synthesized in short time (15 to 30 min) with 89 -98% yield using the catalyst.