81557-53-1Relevant academic research and scientific papers
Synthesis of Condensed Tannins. Part 6. The Sequence of Units, Coupling Positions and Absolute Configuration of the First Linear -Triflavanoid with Terminal 3,4 Diol Function
Viviers, Phillip M.,Young, Desmond A.,Botha, Jacobus J.,Ferreira, Daneel,Roux, David G.,Hull, William E.
, p. 535 - 540 (1982)
The first linear triflavanoid with a terminal 3,4-diol function, (2R,3S,4S:2'R,3'S,4'R:2''R,3''S,4''R)-bi--(+)-mollisacacidin, is associated with a set of four diastereoisomeric biflavanoid homologues, -(-)-fisetinidol-(+)-mollisacacidins, in the heartwood of the black wattle tree, Acacia mearnsii.The sequence of units in the triflavanoid and its bonding points have been determined by n.m.r. spectroscopy at 500 MHz using spin-decoupling techniques.The triflavanoid and two biflavanoids with (2R,3S,4S)-2,3-trans-3,4-cis-configurations in their "upper" units, result from the in vitro self-condensation of their putative precursor (2R,3S,4R)-flavan-3,3'4,4',7-pentaol, thus permitting definition of their respective absolute configurations.
