• Nuclear oxidation in flavones and related compounds - Part XLI. A study of 2′:5′-hydroxy-flavonols

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      https://www.ias.ac.in/article/fulltext/seca/036/05/0355-0362

    • Keywords

       

      Flavone; Concentrate Sulphuric Acid; Anhydrous Potassium Carbonate; Gentisic Acid; Dimethyl Sulphate

    • Abstract

       

      3:7:2′-5′-Tetrahydroxy flavone and 3:5:7:2′:5′-pentahydroxy flavone and their derivatives are prepared and their colour reactions recorded. The flavone with only 2′-hydroxyl free (X) and also its 5′-hydroxyl derivative (XI) do not give any colour with ferric chloride indicating absence of chelation. Alkali colour reactions confirm the original finding that a quinol grouping in the side phenyl nucleus does not produce marked colour effects.

    • Author Affiliations

       

      J M Sehgal1 T R Seshadri1

      1. From the Department of Chemistry, Delhi University, Delhi
    • Dates

       
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