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On the tautomerism of hypericin: The 1,6-dioxo tautomer

Zur Tautomerie des Hypericins: Das 1,6-Dioxo-Tautomere

  • Organische Chemie Und Biochemie
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Monatshefte für Chemie / Chemical Monthly Aims and scope Submit manuscript

Summary

The 1,6-dioxo-tautomer of hypericin was obtained by basic and BF3 catalyzed tautomerization of the natural and most stable 7,14-dioxo-tautomer. The isolation of this tautomer was aided by its insolubility in methanol. It was identified and characterized by spectroscopic methods, and its detailed structure was derived by means of force field calculations.

Zusammenfassung

Das 1,6-Dioxo-Tautomere des Hypericins wurde durch basen- und BF3-katalysierte Tautomerisierung des natürlichen, stabilen 7,14-Dioxo-Tautomers erhalten. Dessen Isolierung wurde durch die Schwerlöslichkeit in Methanol ermöglicht. Es wurde durch spektroskopische Methoden identifiziert und charakterisiert, und seine detaillierte Struktur wurde aus Kraftfeld-Rechnungen abgeleitet.

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References

  1. Roth L. (1990) Hypericum-Hypericin, Botanik Inhaltsstoffe Wirkung. Ecomed, Landsberg

    Google Scholar 

  2. Walker E. B., Lee T. Y., Song P. S. (1979) Biochim. Biophys. Acta587: 129; Song P. S. (1981) Biochim. Biophys. Acta639: 1; Kim I., Prusti R. K., Song P. S., Häder D.-P., Häder M. (1984) Biochim. Biophys. Acta799: 298

    Google Scholar 

  3. Meruelo D., Lavie G., Lavie D. (1988) Proc. Natl. Acad. Sci. USA85: 5230; Lavie G., Valentine F., Levin B., Mazur Y., Gallo G., Lavie D., Weiner D., Meruelo D. (1989) Proc. Natl. Acad. Sci. USA86: 5963; Tang J., Colacino J. M., Larsen S. H., Spitzer W. (1990) Antiviral Research13: 313; Lavie D., Revel M., Rotmann D., Van de Velde V. (1988) European Patent Appl. 0256452, A2; Lopez-Bazzocchi I., Hudson J. B., Towers G. H. N. (1991) Photochem. Photobiol.54: 95

    Google Scholar 

  4. Brockmann H., Falkenhausen E. H., Neeff R., Dorlan A., Budde G. (1950) Naturwiss.37: 540; Brockmann H., Kluge F. (1951) Naturwiss.38: 141; Brockmann H., Kluge F., Muxfeldt H. (1957) Chem. Ber.90: 2302; Brockmann H. (1957) Fortschr. Chem. Org. Naturst.14: 141

    Google Scholar 

  5. Falk H., Schoppel G. (1992) Monatsh. Chem.123: 931

    Google Scholar 

  6. Etzlstorfer C., Falk H., Müller N., Schmitzberger W., Wagner U. G. (1993) Monatsh. Chem.124: 751

    Google Scholar 

  7. Falk H., Meyer J. (1992) Hitherto unpublished results

  8. Randic M. (1975) Tetrahedron31: 1477

    Google Scholar 

  9. Falk H., Schmitzberger W. (1992) Monatsh. Chem.123: 731

    Google Scholar 

  10. Falk H., Schlederer T. (1979) Ann. Chem.1979: 1560

    Google Scholar 

  11. Falk H., Meyer J., Oberreiter M. (unpublished)

  12. Sprague J. T., Tai J. C., Yuh Y., Allinger N. L. (1987) J. Comp. Chem.8: 581; Liljefors T., Tai J. C., Yuh Y., Allinger N. L. (1987) J. Comp. Chem.8: 1051

    Google Scholar 

  13. Etzlstorfer C., Falk H., Müller N. (1993) Monatsh. Chem.124: 431

    Google Scholar 

  14. Ball ⇐p; Stick 3.5: Müller N., Falk A. (1992) Cherwell Scientific Publ. Ltd., Oxford, U.K.

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Etzlstorfer, C., Falk, H. & Oberreiter, M. On the tautomerism of hypericin: The 1,6-dioxo tautomer. Monatsh Chem 124, 923–929 (1993). https://doi.org/10.1007/BF00816415

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  • DOI: https://doi.org/10.1007/BF00816415

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