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Studies on circular dichroism. XII. Chiroptical properties of some flavone and isoflavone glycosides

T. Sticzay, S. Bystrický, C. Peciar, A. Lévai, and R. Bognár

Institute of Chemistry, Slovak Academy of Sciences, 809 33 Bratislava

 

Abstract:  Ultraviolet and CD spectra of twelve isoflavone and five flavone glycosides were measured. The saccharide moiety was bound to the aglycone by a β-glyoosidic bond in positions 7 or 4', and 3, respectively. The CD spectra of 7-glycosyloxyisoflavones revealed negative, those of 4'-glycosyloxyisoflavones positive Cotton effects at about 330 nm. The spectra of flavone glycosides showed a characteristic intense positive chiroptical band at 250 nm and a negative one at 350 nm. The intensities of Cotton effects are lower in isoflavone than those in flavone glycosides.

Full paper in Portable Document Format: 294a538.pdf

 

Chemical Papers 29 (4) 538–543 (1975)

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