Chemistry:Ombuin
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| Names | |
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| IUPAC name
3,3′,5-Trihydroxy-4′,7-dimethoxyflavone
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| Systematic IUPAC name
3,5-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-7-methoxy-4H-1-benzopyran-4-one | |
| Other names
4′,7-Dimethylquercetin
7,4′-Di-O-methylquercetin 4′,7-Dimethoxy-3,3′,5-trihydroxyflavone | |
| Identifiers | |
3D model (JSmol)
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| Properties | |
| C17H14O7 | |
| Molar mass | 330.29 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
 verify (what is   ?)
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| Infobox references | |
Ombuin is an O-methylated flavonol, a type of flavonoid. It is the 4',7-O-methyl derivative of quercetin.
Ombuin can be found in species of the genus Erythroxylum. It can also be synthesized.[1] Ombuin 3-sulfate can be isolated from Flaveria chlorifolia.[2]
Glycosides
Ombuin-3-rutinoside can be isolated from Phytolacca dioica, the ombu tree.[3] Ombuin-3-O-rhamnosylglucoside can be found in Erythroxylum rufum.[4]
Other glycosides (ombuosides) :
- Ombuin 3-galactoside (C23H24O12, CAS number 69168-13-4)
- Ombuin 3-glucoside (C23H24O12, CAS number 158642-42-3)
References
- ↑ Partial methylation of quercetin: Direct synthesis of tamarixetin, ombuin and ayanin. Koppaka V. Rao, Jacob A. Owoyale, Journal of Heterocyclic Chemistry, Volume 13 Issue 6, Pages 1293 - 1295[|permanent dead link|dead link}}]
- ↑ Ombuin 3-sulphate from Flaveria chloraefolia. Denis Barron and Ragai K. Ibrahim, Phytochemistry, Volume 27, Issue 7, 1988, pages 2362-2363, doi:10.1016/0031-9422(88)80166-3
- ↑ Über die Synthese von Quercetin-3-glykosiden, II. Synthese des Ombuosids und eine rationelle Synthese von Rutin. Ludwig Hörhammer, Hildebert Wagner, Hans-Günther Arndt, Gustav Hitzler, Lorand Farkas, Chemische Berichte, Volume 101 Issue 4, Pp 1183-1185, 1968 (German)
- ↑ Flavonoids of Erythroxylum rufum and Erythroxylum ulei. Bruce A. Bohm, David W. Phillips and Fred R. Gander, J. Nat. Prod., 1981, volume 44, issue 6, pages 676–679, doi:10.1021/np50018a009
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