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4-Hydr-oxy-3-[(2E)-3-(3,4,5-trimethoxy-phen-yl)prop-2-eno-yl]-2H-chromen-2-one.

ABSTRACT: A new chalcone of the coumarin, C(21)H(18)O(7), containing an annulated ?-pyrone ring, was obtained by condensation of the borate complex of ac-yl(hydr-oxy)coumarin with trimethoxy-benzaldehyde. The structure exhibits intra-molecular hydrogen bonding between the hydroxyl oxygen and the ketonic oxygen in the coumarin group. The bicyclic coumarin fragment and the benzene ring form a dihedral angle of 17.1?(4)°. The crystal packing involves dimers inter-connected by C-H?O hydrogen bonding.

SUBMITTER: Mechi L

PROVIDER: S-EPMC2969351 | biostudies-literature | 2009 Jun

REPOSITORIES: biostudies-literature

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4-Hydr-oxy-3-[(2E)-3-(3,4,5-trimethoxy-phen-yl)prop-2-eno-yl]-2H-chromen-2-one.

Mechi Lassaad L Chtiba Samar S Hamdi Naceur N Ben Hassen Rached R

Acta crystallographica. Section E, Structure reports online 20090620 Pt 7

A new chalcone of the coumarin, C(21)H(18)O(7), containing an annulated α-pyrone ring, was obtained by condensation of the borate complex of ac-yl(hydr-oxy)coumarin with trimethoxy-benzaldehyde. The structure exhibits intra-molecular hydrogen bonding between the hydroxyl oxygen and the ketonic oxygen in the coumarin group. The bicyclic coumarin fragment and the benzene ring form a dihedral angle of 17.1 (4)°. The crystal packing involves dimers inter-connected by C-H⋯O hydrogen bonding. ...[more]

PMID: 21582916

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