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Saccharose was applied as a green and natural catalyst for the one-pot, three-component condensation between aromatic aldehydes, malononitrile, and resorcinol, or 4-hydroxycoumarine to afford the corresponding pyran-annulated heterocyclic systems. This green methodology offers several advantages such as the use of a non-hazardous catalyst, easy access, clean work-up, excellent yields, short reaction...
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