Abstract
Background: In recent years, the use of nanomaterials as heterogeneous catalysts has attracted much attention in organic reactions. Methods: A magnetically separable mixed metal oxide, Manganese Zinc Iron Oxide (Mn2O3/Fe3O4/ZnO) nanoparticles as nanocatalyst (Mmo@NCt) were synthesized using ultrasonic wave methods in the presence of polyethylene glycol as surfactant. In the second part of the present study, a practical procedure for the one-pot ternary condensation of aromatic aldehydes, β- naphthol, and urea in short reaction time for the synthesis of pharmaceutically interesting naphtho[ 1,2-e][1,3]oxazine derivatives using Mmo@NCt as an efficient, cost-effective and recyclable nanocatalyst under green conditions has been developed. Results: The analysis of phase purity, magnetic structure, size, and morphology of the as-synthesized nanocatalyst was characterized by X-ray diffraction, VSM, SEM, and EDX techniques. The results of SEM imaging showed that all compounds have a spherical morphological structure with a mean diameter of 16.50 ± 3.94 nm. The structure of the products was confirmed by FT-IR, 1HNMR spectroscopy, and melting point. Conclusion: This project was designed and performed with the use of magnetic nanocatalysts as a suitable method with high efficiency a shorter time for the synthesis of naphthoxazinones heterocyclic compounds due to the medicinal importance of water as a green solvent.
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