A set of molecules of substituted 3-Aryl-1H-pyrazol-5-amine is synthesized from substituted benzoylacetonitrile under microwave irradiation in presence of catalytic Ce(OTf)3.SiO2. Also a set of compounds of substituted 3-Aryl-1H-pyrazol-5-amine, 3-phenylisoxazol-5-amine and 5-phenylisoxazol-3-amine is synthesized from substituted 2-(2-phenyl-1, 3-dioxolan-2-yl)acetonitrile under microwave irradiation. Synthesized molecules characterized using spectroscopic techniques such as 1H-NMR, MASS, 13C and physical properties (Melting points). Synthesized molecules confirmed with their standard reported values. This methodology has advantages over classical-conventional method such as lower reaction time, green synthesis approach, high yield, low loading of heterogeneous Ce(OTf)3.SiO2 catalyst, recyclability of Ce(OTf)3.SiO2 catalyst and many more.