SYNTHESE DE DIHYDROXY PHENACYLIDENE TRIPHENYLPHOSPHORANES NOUVEAUX PRECURSEURS DE COMPOSES FLAVONOIDES : SYNTHESE D'HYDROXY-6 ET HYDROXY-7 CHROMONES.

DOI: 10.1016/S0040-4039(00)84634-1

Source and publish data:

Tetrahedron Letters p. 2751 - 2752 (1986)

Update date:2022-08-05

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Authors:

Le Floc'H, Yves

Lefeuvre, Martine

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Article abstract of DOI:10.1016/S0040-4039(00)84634-1

The synthesis of two new dihydroxy phenacylidene triphenylphosphoranes from 2,4-dibenzoyloxy and 2,5-dibenzoyloxy acetophenones is described.By acylation of the hydroxyl groups of these ylides, intramolecular olefination of the ester carbonyl group and hydrolysis of the second ester group, some 6-hydroxy and 7-hydroxy chromones are prepared with good yields.

Full text of DOI:10.1016/S0040-4039(00)84634-1

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