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(E)-3-(2H-1,3-Benzodioxol-5-yl)-1-(7-hy-droxy-5-meth-oxy-2,2-dimethyl-chroman-8-yl)prop-2-en-1-one.

ABSTRACT: The reaction of 5,6-(2,2-dimethyl-chromane)-2-hy-droxy-4-meth-oxy-acetophenone and 3,4-methlene-dioxy-benzaldehyde affords the title chalcone derivative, C(22)H(22)O(6). The two benzene rings are connected through a -C(=O)-CH=CH- (propenone) unit, which is in an E conformation; the ring with the hy-droxy substitutent is aligned at 6.2?(1)° with respect to this unit, whereas the ring with the methyl-enedi-oxy substituent is aligned at 8.2?(1)°. The dihdral angle between the rings is 14.32?(7)°. The hy-droxy group engages in an intra-molecular hydrogen bond with the carbonyl O atom of the propenone unit, generating an S(5) ring.

SUBMITTER: Ahmad F

PROVIDER: S-EPMC3200850 | biostudies-other | 2011 Sep

REPOSITORIES: biostudies-other

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(E)-3-(2H-1,3-Benzodioxol-5-yl)-1-(7-hy-droxy-5-meth-oxy-2,2-dimethyl-chroman-8-yl)prop-2-en-1-one.

Ahmad Farediah F Hashim Nur Athirah NA Basar Norazah N Awang Khalijah K Ng Seik Weng SW

Acta crystallographica. Section E, Structure reports online 20110811 Pt 9

The reaction of 5,6-(2,2-dimethyl-chromane)-2-hy-droxy-4-meth-oxy-acetophenone and 3,4-methlene-dioxy-benzaldehyde affords the title chalcone derivative, C(22)H(22)O(6). The two benzene rings are connected through a -C(=O)-CH=CH- (propenone) unit, which is in an E conformation; the ring with the hy-droxy substitutent is aligned at 6.2 (1)° with respect to this unit, whereas the ring with the methyl-enedi-oxy substituent is aligned at 8.2 (1)°. The dihdral angle between the rings is 14.32 (7)°. T ...[more]

PMID: 22058936

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(E)-3-[3,4-Bis(meth-oxy-methoxy)phen-yl]-1-(7-hy-droxy-5-meth-oxy-2,2-dimethyl-chroman-8-yl)prop-2-en-1-one.

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| S-EPMC3200863 | biostudies-other

(E)-1-(5-Hy-droxy-2,2-dimethyl-2H-chromen-6-yl)-3-(3,4,5-trimeth-oxy-phen-yl)prop-2-en-1-one.

Project description:The title compound, C(23)H(24)O(6), crystallizes with two independent mol-ecules (A and B) in the asymmetric unit. The dihedral angles between the benzopyran ring and the α,β-unsaturated ketone unit and between the α,β-unsaturated ketone group and the benzene ring are 9.4 (10) and 12.96 (13)°, respectively, in mol-ecule A and 1.40 (17) and 4.44 (17)°, respectively, in mol-ecule B. The two meth-oxy groups at the meta positions of the benzene ring are close to being coplanar with the ring [C-O-C-C = 6.2 (3) and -1.4 (3)° in mol-ecule A and -4.2 (4) and 3.7 (3)° in mol-ecule B], whereas the third meth-oxy group, at the para position, is (+)-anti-clinal with respect to the benzene ring [C-O-C-C = 81.7 (3)°] in mol-ecule A and is (-)-synclinal with respect to the benzene ring [C-O-C-C = -103.2 (3)°] in mol-ecule B. In both independent mol-ecules, the hy-droxy group is involved in an intra-molecular O-H⋯O hydrogen bond.

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(E)-3-(4-Hy-droxy-3-meth-oxy-phen-yl)-1-(4-hy-droxy-phen-yl)prop-2-en-1-one.

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(E)-1-(2-Hy-droxy-6-meth-oxy-phen-yl)-3-(2,4,6-tri-meth-oxy-phen-yl)prop-2-en-1-one.

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(E)-1-[2-Hy-droxy-4,6-bis-(meth-oxy-meth-oxy)phen-yl]-3-phenyl-prop-2-en-1-one.

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Crystal structure of (2E)-1-(4-hy-droxy-3-meth-oxy-phen-yl)-3-(4-hy-droxy-phen-yl)prop-2-en-1-one.

Project description:In the title moleclue, C16H14O4, the dihedral angle between the benzene rings is 16.1 (3)°. The meth-oxy group is essentially coplanar with the benzene ring to which it is attached, with a C-O-C C torsion angle of 5.5 (9)°. In the crystal, mol-ecules are linked by O-H⋯O and bifurcated O-H⋯(O,O) hydrogen bonds, forming a three-dimensional network. The structure was refined as a two-component inversion twin.

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[(1R,3S)-2,2-Dichloro-3-(hy-droxy-meth-yl)cyclo-prop-yl]methanol.

Project description:The title compound, C(5)H(8)Cl(2)O(2), represents a meso isomer crystallizing in a chiral space group with two mol-ecules per asymmetric unit. The mol-ecules form helical associates with a pitch of 6.31 Å along the a axis via O-H⋯O hydrogen bonds. The overall three-dimesional supra-molecular architecture is stabilized by C-Cl⋯O halogen bonding, with a Cl⋯O separation of 3.139 (3) Å and a C-Cl⋯O angle of 162.5 (2)°.

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1-(2-Hy-droxy-4-meth-oxy-phen-yl)-3-(4-methyl-phen-yl)prop-2-en-1-one.

Project description:The mol-ecule of the title compound, C(17)H(16)O(3), exists in the E conformation with respect to the central C=C bond, is almost planar(r.m.s. deviation = 0.003 Å) and has an intra-molecular O-H⋯O hydrogen bond, which generates an S(6) ring. In the crystal, mol-ecules are linked by C-H⋯O inter-actions.

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1-(5-Hy-droxy-2,2,8,8-tetra-methyl-2H,8H-pyrano[2,3-f]chromen-6-yl)-3-(4-meth-oxy-phen-yl)prop-2-en-1-one.

Project description:In the biologically active title compound, C26H26O5, the pyran ring of the chromene unit adopts a half-chair conformation. The C=C double bond of the propenone unit exhibits a trans conformation and the carbonyl group is syn conformation to the double bond. The dihedral angle between the benzene ring and the benzopyran-one moiety is 31.54 (4)°. The mol-ecular structure is stabilized by an intra-molecular C=O⋯H-O hydrogen bond.

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