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Issue 6, 1969
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Synthesis of chromones and thiochromones (4H-benzo[b]thiapyrones) from enamines

Abstract

Fourteen 2,3-cycloalkeno-chromones and -thiochromones (4H-benzo[b]thiapyrones) have been prepared by a new method in which enamines of cyclic ketones are condensed with the mixed anhydrides formed from ethylchloroformate and acetylsalicylic acids and their thio-analogues. An acyl migration occurs in the reactions of 2-pyrrolidinopropene to give 3-acyl-2-methylchromones.

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Article information


J. Chem. Soc. C, 1969, 935-937
Article type
Paper

Synthesis of chromones and thiochromones (4H-benzo[b]thiapyrones) from enamines

G. V. Boyd, D. Hewson and R. A. Newberry, J. Chem. Soc. C, 1969, 935
DOI: 10.1039/J39690000935

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