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Title
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Preparation, characterization and catalytic application of molybdenum Schiff‐base complex immobilized on silica‐coated Fe3O4 as a reusable catalyst for the synthesis of pyranopyrazole derivatives
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Type
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JournalPaper
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Keywords
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immobilized complex, multicomponent reaction, pyranopyrazoles, solvent‐free
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Abstract
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A recoverable molybdenum Schiff‐base complex immobilized on silica‐coated Fe3O4 nanoparticles was prepared and characterized. This superparamagntic nanocatalyst, which is separable using an external magnet, can be used as an efficient catalyst for the promotion of the synthesis of pyranopyrazole derivatives. A variety of desired products were obtained in high to excellent yields within short times. In comparison with other catalysts employed in the condensation of various aromatic aldehydes, malononitrile and 3‐methyl‐1‐phenyl‐2‐ pyrazoline‐5‐one, the present catalyst showed a much higher activity in terms of mild conditions and short reaction time. The catalyst can be reused for several times without significant loss of activity. Supporting Information
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Researchers
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Niloofar Karami (Fifth Researcher), Farshid Hajibabaei (Fourth Researcher), (Third Researcher), Sadegh Salehzdeh (Second Researcher), (First Researcher)
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