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Title
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1-Methylimidazolium tricyanomethanide {[HMIM]C(CN)3} as a nano structure and reusable molten salt catalyst for the synthesis of tetrahydrobenzo[b]pyrans via tandem Knoevenagel-Michael cyclocondensation and 3,4-dihydropyrano[c]chromene derivatives
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Type
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JournalPaper
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Keywords
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1-Methylimidazolium tricyanomethanide{[HMIM]C(CN)3} Nano molten salt (NMS) Tetrahydrobenzo[b]pyrans 3,4-Dihydropyrano[c]chromene Solvent-free
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Abstract
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An expeditious, experimentally simple and rapid 1-methylimidazolium tricyanomethanide {[HMIM]C(CN)3} nano molten salt (NMS) catalyzed tandem Knoevenagel-Michael cyclocondensation procedure for the synthesis of tetrahydrobenzo[b]pyrans was described via reaction between dimedone, aromatic aldehyde and malononitrile under solvent-free conditions at room temperature. Furthermore, 3,4-dihydropyrano[c]chromene derivatives through the condensation of 4-hydroxycoumarin, aromatic aldehyde and malononitrilewere synthesized by a catalytic amount of {[HMIM]C(CN)3} NMS under the same condition
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Researchers
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(Fourth Researcher), (Third Researcher), (Second Researcher), ma z (First Researcher)
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