Journal of the Chemical Society. Perkin transactions I p. 3182 - 3185 (1981)
Update date:2022-08-04
Topics:
Pelter, Andrew
Ward, Robert S.
Haensel, Rudolf
Khaliefi, Faies
The 13C n.m.r. spectra of a series of auronols and flavonols have been analysed in order to determine the tautomeric structures of the auronols and to distinguish between the two series.By using a specifically 13C labelled auronol sample, together with coupling constants, changes on addition of D2O, and solvent-shift data, it has been shown that auronol and 6-substituted auronols exist in solution as the 2-benzoyl-3-hydroxybenzofurans whereas 4,6-dihydroxyauronol exists as a mixture of the E- and Z-7'-hydroxyaurones.
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