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ChemInform Abstract: The Preparation of 2-(4-Oxo-4H-1-benzopyran-2-yl)-1-phenylethanones by the Condensation/Cyclization of Dilithiated 1-Benzoylacetone with Lithiated Methyl Salicylates.

✍ Scribed by A. J. ANGEL; D. R. HURST; A. R. WILLIAMS; K. L. FRENCH; C. F. BEAM

Publisher: John Wiley and Sons
Year: 2010
Weight: 29 KB
Volume: 29
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199834166

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✦ Synopsis

The Preparation of 2-(4-Oxo-4H-1-benzopyran-2-yl)-1phenylethanones by the Condensation/Cyclization of Dilithiated 1-Benzoylacetone with Lithiated Methyl Salicylates.

-Condensation of dilithiated 1-benzoylacetone (I) with lithiated methyl salicylates (II) followed by acid-induced cyclization provides 2-phenacylchromones (III) (8 examples) in a one-pot two-step reaction. -(ANGEL, A.

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