88244-65-9Relevant articles and documents
Synthesis of Condensed Tannins. Part 9. The Condensation Sequence of Leucocyanidin with (+)-Catechin and with the Resultant Procyanidins
Delcour, Jan. A.,Ferreira, Daneel,Roux, David G.
, p. 1711 - 1717 (2007/10/02)
Molar equivalents of synthetic (2R,3S,4R of S)-leucocyanidin and (+)-catechin condense with exceptional rapidity at pH 5 under ambient conditions to give the all-trans-- and -bi- (procyanidins B3, B6) the all-trans-- and -tri- (procyanidin C2, and novel isomer), and the presumed all-trans--linked tetraflavanoid analogue in the proportions 10:1:12:1:3.The facility and sequence of these condensations correlate with the observed absence of leucocyanidins (flavan-3,3',4,4',5,7-hexaols) and also the dominance of related condensed tannins in plant extracts.