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Abstract
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In the present work, ZnFe2O4 nanopowder, as a highly efficient and heterogeneous catalyst, was prepared and fully characterized by IR, UV, XRD, EDX and SEM analysis. The nanocatalyst was employed as a highly stable and reusable catalyst for the synthesis of pyrano[2,3-d]pyrimidines by the one-pot threecomponent condensation reaction of 1,3-dimethylbarbituric acid and malononitrile with aromatic aldehydes under solvent-free conditions. ZnFe2O4 nanoparticles with Lewis acidic properties (by the Fe3+ of Fe2O3) and basic character (related to the O2 of ZnO), can catalyze this reaction. This procedure has some advantages, such as efficiency, generality, high yield, short reaction time, cleaner reaction profiles, ease of product isolation and simplicity.
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