Abstract
An efficient synthesis of 4-alkyl-4-methyl-3,4-dihydro-2H,5H-pyrano[3,2-c]chromene-2,5-dione or 4-aryl-3,4-dihydro-2H,5H-pyrano[3,2-c]chromene-2,5-diones via reaction 4-hydroxycoumarin with Meldrum's acid and ketones or aldehydes is described.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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4-Hydroxycoumarins / chemistry*
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Aldehydes / chemistry*
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Benzopyrans / chemical synthesis*
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Dioxanes / chemistry*
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Ketones / chemistry*
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Molecular Structure
Substances
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4-Hydroxycoumarins
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Aldehydes
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Benzopyrans
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Dioxanes
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Ketones
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Meldrum's acid
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4-hydroxycoumarin