Abstract
Silica-supported molybdic acid was employed as novel, recyclable, and safe catalyst in a one-pot three-component condensation of aldehydes, malononitrile, and 4-hydroxycoumarin to produce new and known pyrano[2,3-c]chromenes as potent biologically active compounds. This expedient new route has advantages, such as the use of a safe and reusable catalyst, simple operation, short reaction times, and good to excellent yields. The silica-supported molybdic acid as a novel solid acid was characterized by X-ray fluorescence, X-ray diffraction, and Fourier transform infrared spectroscopy.
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We thank the Yasouj University for their support.
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Karami, B., Kiani, M. Silica-supported molybdic acid: preparation, characterization, and its catalytic application in synthesis of pyranocoumarins. Monatsh Chem 147, 1117–1124 (2016). https://doi.org/10.1007/s00706-015-1551-3
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DOI: https://doi.org/10.1007/s00706-015-1551-3