Chemical constituents of the lichen, Candelaria concolor: A complete NMR and chemical degradative investigation

Dias, D and Urban, S 2009, 'Chemical constituents of the lichen, Candelaria concolor: A complete NMR and chemical degradative investigation', Natural Product Research, vol. 23, no. 10, pp. 925-939.


Document type: Journal Article
Collection: Journal Articles

Title Chemical constituents of the lichen, Candelaria concolor: A complete NMR and chemical degradative investigation
Author(s) Dias, D
Urban, S
Year 2009
Journal name Natural Product Research
Volume number 23
Issue number 10
Start page 925
End page 939
Total pages 15
Publisher Taylor & Francis Ltd
Abstract A detailed chemical and spectroscopic investigation of the terrestrial lichen Candelaria concolor has yielded several lichenic metabolites belonging to the pulvinic acid series, as well as several depside derivatives including pulvinic dilactone (1), vulpinic acid (4) and calycin (5). The chemical transformation of 1 to pulvinic acid (3) is reported for the first time, as is the conversion of atranorin (6) to 5-chloroatranorin (7) and then finally to 5,5'-dichloroatranorin (8) under very mild conditions. Also presented is the complete 1D and 2D NMR assignment for compounds 1, 3, 4, 5 and 8, including partial NMR chemical shift assignments for the unstable depside (7). Previously, these metabolites had only been partially assigned by NMR spectroscopy.
Subject Natural Products Chemistry
Keyword(s) Biological activity
Depside
Lichen
Natural product
Pulvinic acid derivatives
DOI - identifier 10.1080/14786410802682536
Copyright notice © 2009 Taylor & Francis.
ISSN 1478-6427
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Citation counts: TR Web of Science Citation Count  Cited 8 times in Thomson Reuters Web of Science Article | Citations
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