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Assignment of the 1 H and 13 C NMR spectra of anthraquinone glycosides from Rhamnus frangula
Author(s) -
Francis G. W.,
Aksnes D. W.,
Holt Ø.
Publication year - 1998
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/(sici)1097-458x(1998100)36:10<769::aid-omr361>3.0.co;2-e
Subject(s) - chemistry , glycoside , anthraquinone , two dimensional nuclear magnetic resonance spectroscopy , stereochemistry , carbon 13 nmr , nuclear magnetic resonance spectroscopy , chemical shift , nmr spectra database , organic chemistry , spectral line , physics , astronomy
1 H and 13 C NMR chemical shifts are reported for five anthraquinone glycosides from Rhamnus frangula (Alder Buckthorn). The investigation utilized data obtained by a variety of 1D and 2D NMR techniques such as homodecoupling, NOE, J ‐modulated spin‐echo, COSY, HSC and COLOC. Assignments were made for frangulin A and B and glucofrangulin A and B. A further compound previously thought to be a glycoside of emodin is shown to be physcion‐8‐ O ‐β‐ D ‐glucoside. © 1998 John Wiley & Sons, Ltd.