BIFLAVANOID PROGUIBOURTINIDIN CARBOXYLIC ACIDS AND THEIR BIFLAVANOID HOMOLOGUES FROM ACACIA LUEDERITZII

Article abstract of DOI:10.1016/S0031-9422(00)83054-X

Key Word Index - Acacia luederitzii; Leguminosae; leucoguibourtinidins; proguibourtinidins; carboxylic acids; 3,4',7-trihydroxyflavanyls; regio-isomerism; diastereoisomers; 6-carboxyl-(+)-catechin; biflavanoids. - <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.