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    • Keywords


      Anthraquinone; Emodin; Methyl Iodide; Silver Oxide; Dimethyl Sulphate

    • Abstract


      Teloschistin has been prepared from physcion, the essential stage being the ω-bromo compound obtained by the use of N-bromo-succinimide. The higher m.p. of 244–46° is now recorded both for the synthetic and for the natural sample purified through the acetate. Complete methylation of teloschistin requires the use of methyl iodide and silver oxide at the final stage.

    • Author Affiliations


      S Neelakantan1 2 T R Seshadri1 2 Sankara Subramanian1 2

      1. Department of Chemistry, Delhi University, Delhi
      2. Department of Pharmacy, Andhra University, Waltair
    • Dates


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