Tannins absolute configuration

The potential of this development for the structural elucidation of the proanthocyanidin condensed tannins, especially the 5-deoxy analogues, from important commercial sources is clear. In addition, the method facilitates the ready definition of the absolute configuration of the chainterminating flavan-3-ol moiety in 5-deoxyoligoflavanoids, especially in... 

Roux, D.G., and D. Ferreira The Direct Biomimetic Synthesis, Structure and Absolute Configuration of Angular and Linear Condensed Tannins. Fortschr. Chem. organ. Naturstoffe, 41, 47 (1982). 

Botha, J.J., D. Ferreira, and D.G. Roux Condensed Tannins Direct Synthesis, Structure, and Absolute Configuration of Four Biflavanoids from Black Wattle Bark ( Mimosa ) Extract. J. Chem. Soc., Chem. Commun., 700 (1978) Synthesis of Condensed Tannins. Part 4. A Direct Biomimetic Approach to [4,6]- and [4,8]-Biflavanoids. J. Chem. Soc., Perkin Trans. 1, 1235 (1981). 

Contents E. HASLAM The Metabolism of Gallic Acid and Hexahydroxydi-phenic Acid in Higher Plants. — D. G. ROUX and D. FERREIRA The Direct Biomimetic Synthesis, Structure and Absolute Configuration of Angular and Linear Condensed Tannins. — ST. J. GOULD and ST. M. WEINREB Streptonigrin. — D. J. ROBINS The Pyrrolizidine Alkaloids. — J. W. DALY Alkaloids of Neotropical Poison Frogs (Dendrobatidae). 

Botha J J, Ferreira D, Roux D G 1978 Condensed tannins Circular dichroism method of assessing the absolute configuration at C-4 of 4-arylflavan-3-ols and stereochemistry of their formation from flavan-3,4-diols. J Chem Soc Chem Commun 698-700... 

Roux D G, Ferreira D 1982 The direct biomimetic synthesis structure and absolute configuration of angular and linear condensed tannins. Fortschr Chem Org Naturst 4147-4176... 

Steenkamp J A, Ferreira D, Roux D G, Hull WE 1983 Synthesis of condensed tannins. Part 8. The first branched (4,6 8 4,6)-tetraflavanoid. Coupling sequence and absolute configuration. J Chem Soc Perkin Trans I 23-28... 

The Direct Biomimetic Synthesis, Structure and Absolute Configuration of Angular and Linear Condensed Tannins... 

Viviers, P. M., D. A. Young, J. J. Botha, D. Ferreira, D. G. Roux, and W. E. Hull Synthesis of condensed tannins. Part 6. The sequence of units, coupling positions and absolute configuration of the first linear [4,6 4,6]-triflavanoid with terminal 3,4-diol function. J. Chem. Soc. Perkin I 1982 (in press). 

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