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3-Hy-droxy-2-(4-meth-oxy-phen-yl)-4H-chromen-4-one.

ABSTRACT: In the title compound, C(16)H(12)O(4), the benzene ring is twisted at an angle of 12.3?(1)° relative to the 4H-chromene skeleton, and an intramolecular O-H?O hydrogen bond occurs. The meth-oxy group is almost coplanar with the benzene ring [1.5?(1)°]. In the crystal, inversely oriented mol-ecules are arranged in double (A, A') columns, along the b axis, and are linked by a network of inter-molecular O-H?O hydrogen bonds (between A and A') and C-H?? contacts (within A or A'). The 4H-chromene cores are parallel within A or A', but make a dihedral angle of 88.6?(1)° between A and A'.

SUBMITTER: Wera M

PROVIDER: S-EPMC3051573 | biostudies-literature | 2011 Jan

REPOSITORIES: biostudies-literature

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3-Hy-droxy-2-(4-meth-oxy-phen-yl)-4H-chromen-4-one.

Wera Michał M Serdiuk Ilia E IE Roshal Alexander D AD Błażejowski Jerzy J

Acta crystallographica. Section E, Structure reports online 20110122 Pt 2

In the title compound, C(16)H(12)O(4), the benzene ring is twisted at an angle of 12.3 (1)° relative to the 4H-chromene skeleton, and an intramolecular O-H⋯O hydrogen bond occurs. The meth-oxy group is almost coplanar with the benzene ring [1.5 (1)°]. In the crystal, inversely oriented mol-ecules are arranged in double (A, A') columns, along the b axis, and are linked by a network of inter-molecular O-H⋯O hydrogen bonds (between A and A') and C-H⋯π contacts (within A or A'). The 4H-chromene core ...[more]

PMID: 21523104

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2-(4-Hy-droxy-phen-yl)-3-meth-oxy-4H-chromen-4-one.

Project description:In the title compound, C16H12O4, the substituent benzene ring and meth-oxy group are twisted relative to the 4H-chromene skeleton by 24.1 (1) and 61.3 (1)°, respectively. In the crystal, mol-ecules are connected by classical O-H⋯O and weak C-H⋯O hydrogen bonds, forming chains parallel to [201]. The 4H-chromene ring systems of adjacent mol-ecules are either parallel or inclined at an angle of 28.9 (1)°.

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Crystal structure of 2-(2,3-di-meth-oxy-naphthalen-1-yl)-3-hy-droxy-6-meth-oxy-4H-chromen-4-one.

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4-Hy-droxy-3-[(4-hy-droxy-6,7-dimethyl-2-oxo-2H-chromen-3-yl)(4-oxo-4H-chromen-3-yl)meth-yl]-6,7-dimethyl-2H-chromen-2-one.

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7-Hy-droxy-6-meth-oxy-2H-chromen-2-one.

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Structure of 7-hy-droxy-3-(2-meth-oxy-phen-yl)-2-tri-fluoro-meth-yl-4<i>H</i>-chromen-4-one.

Project description:Herein, the synthesis and crystal structure of 7-hy-droxy-3-(2-meth-oxy-phen-yl)-2-tri-fluoro-meth-yl-4H-chromen-4-one, C17H11F3O4, are reported. This isoflavone is used as a starting material in the preparation an array of potent and competitive FPR antagonists. The pyran ring significantly deviates from planarity and the dihedral angle between the benzo-pyran mean plane and that of the exocyclic benzene ring is 88.18 (4)°. In the crystal, O-H⋯O hydrogen bonds connect the mol-ecules into C(8) chains propagating in the [010] direction.

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N-(2-Hy-droxy-eth-yl)-5-(4-meth-oxy-phen-yl)-4H-pyrazole-3-carboxamide.

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