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| Titel: |
Synthesis of Condensed Tannin Derivatives and their Protein-Precipitating Capacity |
| Auteur: |
Kawamoto, Haruo Nakatsubo, Fumiaki Murakami, Koji |
| Verschenen in: |
Journal of wood chemistry and technology |
| Paginering: | Jaargang 10 (1990) nr. 1 pagina's 59-74 |
| Jaar: |
1990-03-01 |
| Inhoud: |
Four regiospecifically methylated condensed tannin derivatives were synthesized by the condensation of regiospecifically methylated flavan-3, 4-diols protected by benzyl groups, and subsequent debenzylation. The monomeric flavan-3,4-diols were obtained via four reaction steps starting from phloroacetophenone derivatives and protocatechualdehyde derivatives. Protein—precipitating capacity of these synthetic condensed tannin derivatives was tested and a comparision of these capacity suggests the following results: 1) Phenolic hydroxyl groups in tannins are essential sites for protein precipitation. 2) Although the A-ring has been considered not to be important for tannin—protein interactions, it was proved that the A-ring also plays an important role together with the B-ring. 3) Both hydroxyl groups of A- and B-rings may synergistically interact with proteins. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 8 van 9 gevonden artikelen
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