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Isolation and spectral study of 4‐methyl‐6,8‐dihydroxy‐7 H ‐benz[ de ]anthracen‐7‐one
Author(s) -
Wang H. M.,
Shi W.,
Xu Y. K.,
Wang P.,
Chen W.,
Liu Y.,
Lü M. J.,
Pa J. Q.
Publication year - 2003
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/mrc.1148
Subject(s) - chemistry , heteronuclear molecule , dept , carbon 13 nmr , spectral analysis , two dimensional nuclear magnetic resonance spectroscopy , proton nmr , stereochemistry , column chromatography , proton , nuclear magnetic resonance spectroscopy , organic chemistry , spectroscopy , physics , quantum mechanics
4‐Methyl‐6,8‐dihydroxy‐7 H ‐benz[ de ]anthracen‐7‐one was isolated from the sap of Aloe by column chromatography. Its 1 H and 13 C NMR spectra were completely assigned by utilizing two‐dimensional 1 H‐detected heteronuclear one‐bond (HMQC) and multiple‐bond (HMBC) chemical shift correlation experiments together with 1 H– 1 H COSY and DEPT techniques. These techniques were also valuable in assigning the protons and carbons of those benzanthrone compounds which were previously incompletely reported because of the overlap of proton signals. The molecular structure was elucidated by 2D NMR analysis. The spectral properties (MS, IR and UV) are also presented. Copyright © 2003 John Wiley & Sons, Ltd.