• Colouring matter of tambul seeds - Part II. Constitution of tambuletin: Synthesis of O-tetraethyl tambuletin

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    • Keywords


      Ferric Chloride; Kaempferol; Wogonin; Aqueous Sodium Hydroxide; Mixed Melting Point

    • Abstract


      By partial ethylation tambuletin forms a definite triethyl-ether giving reactions for a free hydroxyl group in the 5-position. It undergoes oxidative demethylation thus confirming the location of the methyl-ether group in the 8-position. Complete ethylation yields O-tetraethyl-tambuletin which is found to be identical with 3∶5∶7∶4′-tetraethoxy-8-methoxy-flavone, synthesised from kaempferol using the method of nuclear oxidation.

    • Author Affiliations


      K J Balakrishna1 T R Seshadri1

      1. Department of Chemistry, Andhra University, Waltair
    • Dates


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