Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Synthesis of 2,2-Dimethyl-2H-pyran-fused Flavonols Using the Modified Algar-Flynn-Oyamada Reaction
A. C. JainS. M. GuptaAnita Sharma
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1983 Volume 56 Issue 4 Pages 1267-1268

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Abstract

6-Acetyl-2,2-dimethylchromenes when separately condensed with p-anisaldehyde in the presence of ethanolic NaOH and subsequently oxidized with alkaline hydrogen peroxide without isolating the intermediate chalcones afforded the corresponding 2,2-dimethyl-2H-pyran-fused flavonols respectvely in good yield. Thus, flavonols having free 3-hydroxyl and fused with 2,2-dimethyl-2H-pyran can be synthesized easily.

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