Results 171 to 180 of about 6,593 (215)
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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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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-Zárate +2 more
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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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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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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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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 ...
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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Neuroprotective Effects of Ellagitannins: A Brief Review
Current Drug Targets, 2017Neurodegenerative diseases are increasingly inevitable as the population gets older, with enormous socio-economic costs. The World Health Organization (WHO) has reported that by 2040, neurodegenerative diseases will overtake cancer to become the second leading cause of death, after cardiovascular disease.Herein, this review outlines the neuroprotective
Tejada, Silvia +7 more
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Separation and Purification Technology, 2014 Tropical highland blackberry is characterized by its high content of ellagitannins, which are considered to be potentially beneficial for human health, but relatively rare in food sources.
OSCAR Acosta +2 more
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Cytotoxic ellagitannins from Reaumuria vermiculata
Fitoterapia, 2012Three ellagitannins and one disulfated flavonol were isolated from the aerial parts of Reaumuria vermiculata L. Besides that, 16 known compounds were characterized as well. The structures of all compounds were elucidated on the basis of spectroscopic data including 1D and 2D NMR and ESI HR-FTMS. The in vivo antioxidant activity using the oxygen radical
Mahmoud A, Nawwar +9 more
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