Metabolites from the purple heartwood of Mimosoideae I, Acacia peuce F. Muell: the first natural 2,3-cis-peltogynoids

Abstract

The presence of the first (+)-2,3-cis-3,4-cis- and (+)-2,3-cis-3,4-trans-peltogynols differentiates the purple heartwood of A. peuce from those of A. crombei and A. carnei. These compounds were obtained synthetically by epimerization of (+)-peltogynol. Other flavonoids included the known 2,3-trans-peltogynols, peltogynin, combenin, butin, fisetin, (+)-2,3-trans-fustin, and a novel optically active (+)-3-O-methyl-2,3-trans-fustin.