Issue 0, 1983

Synthesis of condensed tannins. Part 9. The condensation sequence of leucocyanidin with (+)-catechin and with the resultant procyanidins

Abstract

Molar equivalents of synthetic (2R,3S,4R or S)-leucocyanidin and (+)-catechin condense with exceptional rapidity at pH 5 under ambient conditions to give the all-trans-[4,8]- and [4,6]-bi-[(+)-catechins](procyanidins B3, B6) the all-trans-[4,8:4,8]- and [4,8:4,6]-tri-[(+)-catechins](procyanidin C2, and novel isomer), and the presumed all-trans-[4,8]-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.

Article information

Article type
Paper

J. Chem. Soc., Perkin Trans. 1, 1983, 1711-1717

Synthesis of condensed tannins. Part 9. The condensation sequence of leucocyanidin with (+)-catechin and with the resultant procyanidins

Jan. A. Delcour, D. Ferreira and D. G. Roux, J. Chem. Soc., Perkin Trans. 1, 1983, 1711 DOI: 10.1039/P19830001711

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements