Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Hexahydroxydiphenic

Figure 5. Metabolism of gallic acid and hexahydroxydiphenic acid. Figure 5. Metabolism of gallic acid and hexahydroxydiphenic acid.
Comparative Aspects of Polyphenol Metabolism - Proanthocyanidins and the complex esters of gallic and hexahydroxydiphenic acid show many structural similarities as plant metaijol i tes. The shape and size of the ester (5) is thus very similar to that of a proanthocyanidin hexamer (1, n = 4). The most striking feature of both structures however s the manner in which free phenolic groups are distributed over the surface of the molecule providing a structure with the inbuilt capacity for multidentate attachment to other species by hydrogen bonding. [Pg.132]

The name ellagitannins is derived from ellagic acid (1.96), which is formed spontaneously from hexahydroxydiphenic acid (1.94/1.95) in aqueous solution via an intra-molecular esterification reaction. [Pg.27]

Figure 16.1 Structure of some representative phenolic compounds (a) benzoic acids, (b) hexahydroxydiphenic acid, (c) flavan-3-ols (flavonoids). Figure 16.1 Structure of some representative phenolic compounds (a) benzoic acids, (b) hexahydroxydiphenic acid, (c) flavan-3-ols (flavonoids).
GALLIC ACID HEXAHYDROXYDIPHENIC ACID ELLAGIC ACID... [Pg.170]

Haddock, E.A., Gupta, R.K., Al-Shafi, S.M.K., Layden, K., Haslam, E. and Magnolato, D. (1982) The metabolism of gallic acid and hexahydroxydiphenic acid in plants biogenetic and molecular taxonomic considerations. Phytochemistry, 21, 1049-62. [Pg.237]

Ellagic acid (4,4 ,5,5 ,6,6 -hexahydroxydiphenic acid dilactone) (XVH) occurs in nature either in its free form or in the form of ellagitannins or glucosides [93], It is found in dicotyledonous plants of the genera castenea, eucalyptus, eugenia, euphorbia, gerinimum, mangifera, platycarya, quercus, rhus and terminalia [94],... [Pg.755]

Fig, 12.2. Corilagin, an ellagitannin, gallic acid, hexahydroxydiphenic acid and ellagic acid. [Pg.196]

Gupta, R. K., S. M. K. Al-Shah, K. Layden, and E. Haslam, The metabolism of gallic acid and hexahydroxydiphenic acid in plants. Part 2. Esters of (5)-hexahydroxydephenic acid with D-glucopyranose( Ci), J. Chem. Soc., Perkin Trans. I, 2525-2534 (1982). [Pg.213]

Ellagic acid (derived from hexahydroxydiphenic acid during hydrolysis of eiiagitannins)... [Pg.662]

Ellagitannins, another group of plant constituents, are derived from hexa-hydroxydiphenic acid, which may be formed by oxidative coupling (C 2.3.1) from two molecules of gallic acid. Ellagic acid is built by spontaneous cyclization from hexahydroxydiphenic acid esters after cleavage of the sugar moieties. [Pg.446]

See other pages where Hexahydroxydiphenic is mentioned: [Pg.118]    [Pg.130]    [Pg.279]    [Pg.376]    [Pg.376]    [Pg.170]    [Pg.31]    [Pg.31]    [Pg.554]    [Pg.80]    [Pg.354]    [Pg.33]    [Pg.166]    [Pg.771]    [Pg.148]    [Pg.149]    [Pg.100]    [Pg.100]    [Pg.101]    [Pg.103]    [Pg.194]    [Pg.661]    [Pg.662]    [Pg.447]   


SEARCH



4,4’,5,5’,6,6’-Hexahydroxydiphenic acid dilactone

Hexahydroxydiphenic acid

Hexahydroxydiphenic esters

© 2024 chempedia.info