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Valoneic acid is a 
It can be chemically synthesized.Enantioselective synthesis of valoneic acid derivative. Hitoshi Abe, Yusuke Sahara, Yuki Matsuzaki, Yasuo Takeuchi and Takashi Harayama, Tetrahedron Letters, Volume 49, Issue 4, 21 January 2008, pp. 605-609,
Plant polyphenols: vegetable tannins revisited, page 136
by
hydrolysable tannin
A hydrolyzable tannin or pyrogallol-type tannin is a type of tannin that, on heating with hydrochloric or sulfuric acids, yields gallic or ellagic acids.
At the center of a hydrolyzable tannin molecule, there is a carbohydrate (usually D-glucose ...
. It is a component of some hydrolysable tannins such as mallojaponin
Mallojaponin is a hydrolysable tannin found in the bark of ''Mallotus japonicus''. This compound contains the moiety elaeocarpusinic acid, an oxidized hexahydroxydiphenic acid group (dehydrohexahydroxydiphenic acid or DHHDP) which reacted with a d ...
.
The difference with its isomer sanguisorbic acid
Sanguisorbic acid is a constituent of some ellagitannins. It is constituted by a hexahydroxydiphenic acid unit linked by an O-C bond to a gallic acid. The differences with its isomers, valoneic acid and nonahydroxytriphenic acid, are that the hydr ...
is that the hydroxyl that links the hexahydroxydiphenoyl
Hexahydroxydiphenic acid is an organic compound with the formula HO)3C6HCO2Hsub>2. It is the oxidatively coupled derivative of gallic acid It is a white solid, although samples are typically brown owing to oxidation.
left, 142px, Ellagic acid. ...
(HHDP) group to the galloyl
Gallic acid (also known as 3,4,5-trihydroxybenzoic acid) is a trihydroxybenzoic acid with the formula carbon, C6hydrogen, H2(hydroxide, OH)3CO2H. It is classified as a phenolic acid. It is found in gallnuts, sumac, Witch-hazel, witch hazel, tea l ...
group belongs to the HHDP group.
It can be chemically synthesized.Enantioselective synthesis of valoneic acid derivative. Hitoshi Abe, Yusuke Sahara, Yuki Matsuzaki, Yasuo Takeuchi and Takashi Harayama, Tetrahedron Letters, Volume 49, Issue 4, 21 January 2008, pp. 605-609,
See also
*Sanguisorbic acid
Sanguisorbic acid is a constituent of some ellagitannins. It is constituted by a hexahydroxydiphenic acid unit linked by an O-C bond to a gallic acid. The differences with its isomers, valoneic acid and nonahydroxytriphenic acid, are that the hydr ...
* Valonea
''Quercus macrolepis'', the Valonia oak, is a species of oak in the beech family, Fagaceae. Formerly, it was commonly treated as a subspecies of the closely related and Sympatry, sympatric Quercus ithaburensis, mount Tabor oak. At present, howev ...
(''Quercus macrolepis'')
* Valoneic acid dilactone
Valoneic acid dilactone is a hydrolysable tannin that can be isolated from the heartwood of ''Shorea laevifolia''5A-Reductase inhibitory tannin-related compounds isolated from Shorea laevifolia. Yoshio Hirano, Ryuichiro Kondo and Kokki Sakai, Jour ...
References
External links
Plant polyphenols: vegetable tannins revisited, page 136
by
Edwin Haslam
Edwin Haslam (1932 – 3 October 2013)Edwin HAS ...
Ellagitannins
Biphenyls
Dihydroxybenzoic acids
Trihydroxybenzoic acids
Catechols
Pyrogallols
Diphenyl ethers
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