Skip to Main Content
Linkage isomerism in trimeric and polymeric 2,3-cis-procyanindinsAuthor(s): Richard W. Hemingway; Lai Yeap Foo; Lawrence J. Porter
Source: Journal of the Chemical Society Perkin I:1209-1216
Publication Series: Miscellaneous Publication
PDF: View PDF (1.8 MB)
DescriptionProcyanindins polymers consist of chains of 5,7,3',4'-tetrahydroxyflavan-3-ol units linked by C(4)-C(6) or C(4)-C(8) bonds.1 Whereas the procyanidin-B group of dimers are known to exist as pairs of isomers with common flavan-3-ol units, but different interflavanoid linkages,2,3 the extent of such isomerism in higher molecular weight procyanidins is unknown. A number of trimeric procyanidins have been isolated,4-7 but no unequivocal proof of their structure has been offered. Large numbers of isomers are possible since the trimeric procyanidins consist of two procyanidin (PC) units each containing three asymmetric centres, a 6,7,3',4'-tetrahydroxyflavan-3-ol chain-terminating unit containing two chiral centres, and C(4)-C(6) or C(4)-C(8) interflavanoid linkages.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationHemingway, Richard W.; Foo, Lai Yeap; Porter, Lawrence J. 1982. Linkage isomerism in trimeric and polymeric 2,3-cis-procyanindins. Journal of the Chemical Society Perkin I:1209-1216
- Kinetics of acid-catalyzed cleavage of procyanindins
- Condensed tannins. Base-catalysed reactions of polymeric procyanidins with phloroglucinol: Intramolecular rearrangements
- Condensed tannins: (4β→8;2β→O→7)-linked procyanidins in Arachis hypogea L.
XML: View XML