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.
Similar content being viewed by others
References
HoriiBr. Chem. Abs., 1941,A ii, 331.
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.
Rao and SeshadriIbid., 1941,14, 289.
Row and SeshadriIbid., 1946,23, 23.
TsengJ. C. S., 1938, 1003.
NelsonJ. A. C. S., 1934,56, 1392.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Rajagopalan, S., Rao, K.V. & Seshadri, T.R. Nuclear oxidation in the flavone series. Proc. Indian Acad. Sci. 26, 18 (1947). https://doi.org/10.1007/BF03170944
Received:
DOI: https://doi.org/10.1007/BF03170944