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Chemical investigation of Indian lichens

Part XI. Constitution of Teloschistin—The position of the methoxyl group

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Summary

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.

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References

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Authors and Affiliations

  1. Chemical and Pharmaceutical Laboratories, Andhra University, Waltair

    S. Neelakantan, S. Rangaswami F.A.Sc., T. R. Seshadri F.A.Sc. & S. Sankara Subramanian

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  1. S. Neelakantan
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  2. S. Rangaswami F.A.Sc.
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  3. T. R. Seshadri F.A.Sc.
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  4. S. Sankara Subramanian
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Neelakantan, S., Rangaswami, S., Seshadri, T.R. et al. Chemical investigation of Indian lichens. Proc. Indian Acad. Sci. (Math. Sci.) 33, 142 (1951). https://doi.org/10.1007/BF03172197

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  • DOI: https://doi.org/10.1007/BF03172197

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