Two new ether-linked proanthocyanidins, epioritin-(4beta-->3)-epioritin-4beta-ol and epimesquitol-(4beta-->4)-epioritin-4beta-ol, were isolated from the heartwood of Acacia caffra. Their structures and absolute configurations were established by spectroscopic methods and syntheses.
The structure and synthesis of the first dimeric proteracacinidins from acacia galpinii
作者:Elfranco Malan、Ashika Sireeparsad
DOI:10.1016/0031-9422(94)00561-7
日期:1995.1
Abstract The first two proteracacinidin dimers were isolated from the heartwood of Acaciagalpinii . Epioritin-4α-ol under mild acidic conditions yielded epioritin-(4β → 6)-epioritin-4α-ol and epioritin (4β → 6)-epioritin-4β-ol, confirming the structures of the two isolated dimers.