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Nuclear oxidation in the flavone series

Part VI. A new synthesis of calycopteretin and 6: 8-dihydroxy-quercetin
  • S. Rajagopalan
  • K. Visweswara Rao
  • T. R. Seshadri
Article
  • 24 Downloads

Summary

It is shown that 5:6:7:8-hydroxy-flavonols (Calycopterein series) can be made from 5:6:7-hydroxy-flavonols (quercetagetin series) by the nuclear oxidation of the 8-position. Quercetagetin and nor-tangeretin have thus been converted into 6:8-dihydroxy-quercetin and calycopteretin in good yields.

Keywords

Flavonol Nobiletin Dimethyl Sulphate Tangeretin Potassium Persulphate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

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    HoriiBr. Chem. Abs., 1941,A ii, 331.Google Scholar
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    Seshadri and VenkateswarluProc. Ind. Acad. Sci.,A, 1946,23, 192. Murti, Row and SeshadriIbid., Proc. Ind. Acad. Sci.,A, 24, 233. Sastri and SeshadriIbid., Proc. Ind. Acad. Sci.,A, 24, 238.Google Scholar
  3. 3.
    Rao and SeshadriIbid., 1941,14, 289.Google Scholar
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    Row and SeshadriIbid., 1946,23, 23.Google Scholar
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    TsengJ. C. S., 1938, 1003.Google Scholar
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    NelsonJ. A. C. S., 1934,56, 1392.CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 1947

Authors and Affiliations

  • S. Rajagopalan
    • 1
  • K. Visweswara Rao
    • 1
  • T. R. Seshadri
    • 1
  1. 1.Department of ChemistryAndhra UniversityWaltair

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