Heterocyclic Compounds
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ChemInform Abstract: A Short and Facile Synthetic Route to Hydroxylated Flavones. New Syntheses of Apigenin, Tricin, and Luteolin.
First published: December 31, 1991
Abstract
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ChemInform Abstract
Coupling of the polyhydroxylated acetophenones (I) with the benzoate ( II) yields the 1,3-propanedione derivatives (III) which undergo acid- catalyzed ring closure to form the desired flavones (IV) upon heating. At lower temperatures, cyclization yields the silylated derivatives (V) .
