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Gallic Acid Derivatives and Hydrolyzable Tannins
1989Gallic acid and its derivatives as they occur in extracts of oak-galls constitute a chemical reagent of considerable antiquity. The blue-black color produced when an aqueous infusion is treated with salts of iron was first described by Pliny; its use in the analysis of mineral waters and as a component of invisible ink were noted as early as the ...
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Correlation of oxidative transformations of hydrolyzable tannins and plant evolution
Phytochemistry, 2000The progressive oxidative transformations in the biogenesis of hydrolyzable tannins, gallotannin (I) --> ellagitannin (II) --> dehydro ellagitannin (III) --> transformed dehydroellagitannin (IV), conform in several aspects to the evolutionary routes in the subclasses of Dicotyledonae, particularly in the Rosidae.
T, Okuda, T, Yoshida, T, Hatano
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Hydrolyzable tannin substances
Chemistry of Natural Compounds, 1975T. K. Chumbalov, T. N. Bikbulatova
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Enzymes in the Biosynthesis of Hydrolyzable Tannins
1992The two classes of hydrolyzable tannins (i.e., gallotannins and ellagitan-nins) have long been postulated to originate from 1,2,3,4,6-pentagalloyl-glucose as their common precursor. The biosynthesis of this pivotal ester was studied with enzymes from oak and sumac leaves. β-Glucogallin (l-O-galloyl-β-D-glucose), the first intermediate of this metabolic
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Journal of agricultural and food chemistry, 2014
An unprecedented analytical method that allows simultaneous structural and quantitative characterization of all functional groups present in tannins is reported. In situ labeling of all labile H groups (aliphatic and phenolic hydroxyls and carboxylic acids) with a phosphorus-containing reagent (Cl-TMDP) followed by quantitative ³¹P NMR acquisition ...
Federica, Melone +3 more
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An unprecedented analytical method that allows simultaneous structural and quantitative characterization of all functional groups present in tannins is reported. In situ labeling of all labile H groups (aliphatic and phenolic hydroxyls and carboxylic acids) with a phosphorus-containing reagent (Cl-TMDP) followed by quantitative ³¹P NMR acquisition ...
Federica, Melone +3 more
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Biosynthesis, Biodegradation, and Cellular Localization of Hydrolyzable Tannins
1999Tannins occupy a prominent position among plant polyphenols, not only because of their widespread occurrence in the plant kingdom but also on grounds of their technological, ecological, and medical significance. Unfortunately, it is impossible to describe simply this large group of natural products on the basis of a common, general chemical structure ...
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Hydrolyzable Tannins: Gallotannins and Ellagitannins
2013Michaël Jourdes +4 more
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Polyphenols ofMyricaria IV. A hydrolyzable tannin substance
Chemistry of Natural Compounds, 1979T. K. Chumbalov +2 more
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