Khodabakhsh Niknam

The preparation and characterization of cobalt aluminate (CoAl2O4) magnetic nanoparticles and its application as a catalyst for the synthesis of a novel class of pyrazol-quinazolinones and 2,3-dihydroquinazolin-4(1H)-ones is described. The structure of the catalyst was studied by Fourier transform infrared spectroscopy, transmission electron microscopy, X-ray difraction, and vibrating sample magnetometer analysis. The resulting cobalt aluminate (CoAl2O4) was an efcient catalyst and afords the desired products in good to excellent yields. Moreover, the catalyst could be easily recovered by magnetic separation and recycled for four times without signifcant loss of its catalytic activity.