• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/seca/033/03/0142-0147

    • Keywords

       

      Glacial Acetic Acid; Emodin; Chromic Acid; Methoxyl Group; Concentrate Sulphuric Acid

    • Abstract

       

      Chromic acid oxidation of teloschistin triacetate yields 4:5-diacetyl-7-O-methylemodic acid. The identity of this acid has been established by comparison with a sample obtained from physcion diacetate by oxidation and by its conversion into 7-O-methylemodic acid and its methyl ester on treatment with methyl alcoholic potash and methyl alcoholic sulphuric acid respectively. The location of the methoxyl group in teloschistin at position 7 has thus been rigidly established. The reduction of teloschistin to its anthranol and its regeneration from this compound are described.

    • Author Affiliations

       

      S Neelakantan1 S Rangaswami1 T R Seshadri1 S Sankara Subramanian1

      1. Chemical and Pharmaceutical Laboratories, Andhra University, Waltair
    • Dates

       
  •  

© 2021-2022 Indian Academy of Sciences, Bengaluru.