Biflavanoid proguibourtinidin carboxylic acids and their biflavanoid homologues from Acacia luederitzii |
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| Authors: | Daneel Ferreira I. Cornelius du Preez Jacobus C. Wijnmaalen David G. Roux |
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| Affiliation: | Department of Chemistry, University of the Orange Free State, P.O. Box 339, Bloemfontein 9300, South Africa |
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| Abstract: | [4,6]- and [4,8]-Proguibourtinidin carboxylic acids (3,7,4′-trihydroxyl functionality) of 2,3-trans-3,4-trans: 2,3-cis- and 2,3-trans-3,4-trans: 2,3-trans-configuration based on (?)-epicatechin or (+)-catechin as constituent units, and their associated biflavanoid homologues, predominate in the heartwood of Acacia luederitzii. They are accompanied by stereochemical and functional analogues and by their putative flavan-3,4-diol and flavan-3-ol precursors. |
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| Keywords: | Leguminosae leucoguibourtinidins proguibourtinidins carboxylic acids 3,4′,7-trihydroxyflavanyls regio-isomerism diastereoisomers 6-carboxyl-(+)-catechin biflavanoids. |
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