Ethyl brevifolin carboxylate from Flueggea microcarpa

The leaves of Flueggea microcarpa contain the ethyl ester of brevifolin carboxylic acid. The elucidation of the structure of this isocoumarin involved extensive use of 1H and 13C NMR data, which are fully reported and analysed for the first time; especially useful were long-range CH coupling intera...

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Published inPhytochemistry (Oxford) Vol. 30; no. 7; pp. 2435 - 2438
Main Authors Gottlieb, Hugo E., Kumar, Sandeep, Sahai, Mahendra, Ray, Anil B.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier Ltd 1991
Elsevier
Subjects
Biological and medical sciences
Chemical constitution
ethyl brevifolin carboxylate
Euphorbiaceae
Flueggea microcarpa
Fundamental and applied biological sciences. Psychology
gallic acid
isocoumarin
norbergenin
Plant physiology and development
pyrogallol
norbergenin
Flueggea microcarpa
Euphorbiaceae
isocoumarin
pyrogallol
gallic acid
ethyl brevifolin carboxylate
Molecular structure
Dicotyledones
Coumarine derivatives
Angiospermae
Isolation
Spermatophyta
Plant leaf
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Summary:The leaves of Flueggea microcarpa contain the ethyl ester of brevifolin carboxylic acid. The elucidation of the structure of this isocoumarin involved extensive use of 1H and 13C NMR data, which are fully reported and analysed for the first time; especially useful were long-range CH coupling interactions. NMR parameters for some models, including norbergenin, as well as pyrogallol, gallic acid and their triacetates, are also reported.
ISSN:0031-9422
1873-3700
DOI:10.1016/0031-9422(91)83676-C