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      Permanent link:
      https://www.ias.ac.in/article/fulltext/seca/023/04/0209-0212

    • Keywords

       

      Potassium Carbonate; Acetone Solution; Monomethyl Ether; Mixed Melting Point; Hydrobromic Acid

    • Abstract

       

      The constitution of calycopterin as 5 ∶ 4′-dihydroxy-3 ∶ 6 ∶ 7 ∶ 8-tetramethoxy-flavone has been confirmed. Calycopterin diethyl ether has been shown to have ethoxyl groups in the 5 and 4′-positions, since on fission with alcoholic alkali, it yieldsp-ethoxy benzoic acid and 2-hydroxy-ω ∶ 3 ∶ 4 ∶ 5-tetramethoxy-6-ethoxy acetophenone. The constitution of the ketone has been established by methylation and comparison with a synthetic sample obtained by the ethylation of ω ∶ 2 ∶ 3 ∶ 4 ∶ 5-pentamethoxy-6-hydroxy-acetophenone.

    • Author Affiliations

       

      T R Seshadri1 V Venkateswarlu1

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

       
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