5,6-Dihydroxy-7,8-dimethoxyflavone

Autor: Lin-Lin Jing, Xiao-Fei Fan, Peng-Cheng Fan, Lei He, Zheng-Ping Jia
Jazyk: angličtina
Rok vydání: 2013
Předmět:
Zdroj: Acta Crystallographica Section E, Vol 69, Iss 7, Pp o1096-o1096 (2013)
Druh dokumentu: article
ISSN: 16005368
1600-5368
DOI: 10.1107/S1600536813014451
Popis: The title compound (systematic name: 5,6-dihydroxy-7,8-dimethoxy-2-phenylchromen-4-one), C17H14O6, is a flavone that was isolated from the petroleum ether-soluble fraction of the rare traditional Chinese medicinal herb Saussurea involucrata. The flavone molecule is almost planar, with a dihedral angle between the planes of the benzopyran-4-one group and the attached phenyl group of 1.89 (6)°. The 5-hydroxy group forms a strong intramolecular hydrogen bond with the carbonyl group, resulting in a six-membered hydrogen-bonded ring. The 6-hydroxy group also forms an intramolecular O—H...O contact. In the crystal, the molecules are linked by O—H...O and C—H...O hydrogen bonds and π–π interactions [3.37 (2)–3.39 (2) Å], which build up a three–dimensional network.
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