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2,3-Dihydro-7,8-dihydr­oxy-3-[(4-methoxy­phenyl)methyl­ene]-4H-1-benzopyran-4-one

✍ Scribed by Chantrapromma, Suchada ;Boonsri, Sompong ;Fun, Hoong-Kun ;Anjum, Shazia ;Kanjana-opas, Akkharawit

Publisher
International Union of Crystallography
Year
2006
Tongue
English
Weight
241 KB
Volume
62
Category
Article
ISSN
1600-5368

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✦ Synopsis

The title compound, also known as intricatinol, C~17~H~14~O~5~, is a homoisoflavanoid that was isolated for the first time from the twigs and stems of Caesalpinia digyna Rottler. The pyran ring is in an envelope form. O—H...O intramolecular hydrogen bonds are observed. Symmetry-related molecules are linked via O—H...O intermolecular interactions to form infinite one-dimensional chains. These chains are interconnected to form a three-dimensional molecular network.

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5-Hydr­oxy-3,7-dimeth­oxy-2-phenyl-4H-1-
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The title compound, C 17 H 14 O 5 , a flavone, was isolated from the rhizomes of Kaempferia parviflora. There are two crystallographically independent molecules in the asymmetric unit. The molecular structure is stabilized by intramolecular O-HÁ Á ÁO and C-HÁ Á ÁO hydrogen bonds. C-HÁ Á ÁO intermole

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Single-crystal X-ray study T = 298 K Mean '(C±C) = 0.002 A Ê R factor = 0.040 wR factor = 0.124 Data-to-parameter ratio = 16.2 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.