✦ LIBER ✦
Spectroscopic properties of free phenolic 4-arylflavan-3-ols as models for natural condensed tannins
✍ Scribed by Pieter W. Van Zyl; Jan P. Steynberg; Edward V. Brandt; Daneel Ferreira
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 702 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
A unique range of free phenolic 4‐arylflavan‐3‐ols consisting of four sets (3′,4′,5,7‐tetrahydroxyflavan‐3‐ol or its 5‐deoxy analogue coupled to phloroglucinol or resorcinol), each composed of three diastereomers (2,3‐trans‐3,4‐trans, 2,3‐trans‐3,4‐cis and 2,3‐cis‐3,4‐trans) were synthesized to assess their spectroscopic properties. ^1^H and ^13^C NMR and circular dichroism data are related to selected structural and stereochemical features with a view to modelling natural phenolic oligoflavanoids.