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Synthesis of ellagitannin natural products
Natural Product Reports, 2011Covering: up to the beginning of 2011 A detailed overview of chemical synthesis approaches to ellagitannins is provided. This unique family of natural products, which belong to the hydrolysable tannin class of plant polyphenols, today features nearly 1000 members that have been fully characterised, from monomeric to oligomeric and complex ...
Laurent, Pouységu +4 more
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Oxidation of the Oak Ellagitannin, Vescalagin
Journal of Natural Products, 2020Vescalagin (1) is a major ellagitannin from young spring leaves of Quercus glauca; however, the amount of 1 decreases as the leaves mature with a concomitant rise in the levels of catechin (3) and procyanidins. In this report, the chemical mechanism responsible for the degradation of 1 was investigated.
Hatsumi Wakamatsu +5 more
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Fungal biodegradation of pomegranate ellagitannins
Journal of Basic Microbiology, 2013AbstractEllagitannins (ETs) are phytochemicals derived from secondary metabolism associated to defense system, with complex chemical structures, which have high participation during all stages of protection against microbial infection. In this study, we report the fungal biodegradation of a bioactive ET, named punicaline which was recovered and ...
Juan A, Ascacio-Valdés +8 more
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Enzymology of Gallotannin and Ellagitannin Biosynthesis
ChemInform, 2005AbstractFor Abstract see ChemInform Abstract in Full Text.
Ruth, Niemetz, Georg G, Gross
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Ellagitannin Chemistry. First Total Synthesis of the 2,3- and 4,6-Coupled Ellagitannin Pedunculagin
The Journal of Organic Chemistry, 1996The biomimetic synthesis of pedunculagin (1) was accomplished through the sequential diastereoselective formation of two biphenyl C-C bonds. The synthesis strategy employed is predicated on extensive conformational modeling and involves initial oxidative coupling of the galloyl moieties at the O(2) and O(3) positions of an appropriately protected ...
Ken S., Feldman, Randall S., Smith
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Pharmacologically Active Ellagitannins from Terminalia myriocarpa
Planta Medica, 2002A new ellagitannin, methyl (S)-flavogallonate (14) along with fourteen known compounds, gallic acid, methyl gallate, ethyl gallate, 2,3-di-O-[( S)-4,5,6,4',5',6'-hexahydroxybiphenyl-2,2'-diyldicarbonyl]-(alpha/beta)-D-glucopyranose (4), vitexin, isovitexin, orientin, iso-orientin, kaempferol 3-O-beta-D-rutinoside, rutin, neosaponarin, ellagic acid ...
Mohamed S A, Marzouk +4 more
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Ellagitannins - nature, occurrence and dietary burden
Journal of the Science of Food and Agriculture, 2000The occurrence of ellagitannins in common foodstuffs is limited to a few fruit and nut species. Dietary intake of ellagitannins is largely explained by the consumption of strawberries, raspberries and blackberries. No reliable figures are available for the ellagitannin burden, but it will probably not exceed 5 mg day−1.
Clifford, M.N., Scalbert, Augustin
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Ellagitannins from Tellima grandiflora
Phytochemistry, 1976Abstract Three ellagitannins present in Tellima grandiflora have been isolated and partly identified. Two are 2,3-digallyl-4,6-hexahydroxydiphenoyl -β- d -glucopyranose and 1,2,3-trigallyl-4,6-hexahydroxydiphenoyl-β- d -glucopyranose. The third is complex, with five gallyl and two hexahydroxydiphenyl residues; hydrolysis yielded glucose, gallic ...
Cornelius K. Wilkins, Bruce A. Bohm
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Recent progress in ellagitannin chemistry
Phytochemistry, 2005AbstractFor Abstract see ChemInform Abstract in Full Text.
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Ellagitannins: Bioavailability, Purification and Biotechnological Degradation
Mini-Reviews in Medicinal Chemistry, 2018The ellagitannins are a group of phenolic compounds with biological activities. Ellagic acid is the product obtained from hydrolysis of ellagitannins. Information related to the biosynthesis of ellagitannins still been scarce and confused.
Pedro, Aguilar-Zarate +5 more
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