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(Z)-4-(2-Naphthyl-amino)-pent-3-en-2-one.

ABSTRACT: The title compound, C(15)H(15)NO, which was synthesized under solvent-free conditions by the reaction of acetoacetone and 2-naphthyl-amine, adopts a Z conformation about the C=C bond. The enamine-ketone fragment is approximately planar [maximum deviation = 0.026 (3) Å] and forms a dihedral angle of 39.78 (3)° with the naphthalene ring system. An intra-molecular N-H⋯O hydrogen bond is observed.

SUBMITTER: Harrad MA

PROVIDER: S-EPMC3151978 | biostudies-literature |

REPOSITORIES: biostudies-literature

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4-(2-Chloro-phenyl-amino)-pent-3-en-2-one.

Project description:In the title compound, C(11)H(12)ClNO, intra-molecular N-H?O hydrogen bonding is present. The dihedral angle between the benzene ring and the pentenone unit is 46.52?(5)°. In the crystal, C-H?O inter-actions between hydrogen atoms of the aryl moiety and two separate oxygen atoms occur, leading to a three-dimensional network.

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4-[(4-Methyl-phen-yl)amino]-pent-3-en-2-one.

Project description:The title enamino-ketone, C(12)H(15)NO, is a derivative of 4-(phenyl-amino)-pent-3-en-2-one with an approximately planar pentenone backbone, the greatest displacement from the plane being 0.042 (1) Å; the asymmetry in C-C distances in the group suggests the presence of unsaturated bonds. The dihedral angle between the benzene ring and the pentenone plane is 29.90 (4)°. In the crystal, an intra-molecular N-H⋯O inter-action and an inter-molecular C-H⋯O hydrogen bond are observed.

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4-{[(1S,2R)-2-Hy-droxy-indan-1-yl]amino}-pent-3-en-2-one.

Project description:In the mol-ecule of the title compound, C(14)H(17)NO(2), the dihedral angle formed by the mean planes through the indan ring system and the amino-pentenone fragment is 83.26 (13)°. An intra-molecular N-H⋯O hydrogen bond is observed. In the crystal, mol-ecules are linked into one-dimensional chains extending along the [010] direction via O-H⋯O and C-H⋯O hydrogen bonds.

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4-(2,3-Dimethyl-anilino)pent-3-en-2-one.

Project description:In the title compound, C(13)H(17)NO, the dihedral angle between the aryl ring and the amino-acryl-aldehyde mean plane [N-C=C-C=O; maximum deviation = 0.0144?(9)?Å] is 53.43?(4)°. There is an intra-molecular N-H?O hydrogen bond involving the amine and carbonyl groups. In the crystal, mol-ecules are linked by C-H?O hydrogen bonds, forming chains propagating along [001].

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4-(2-Methyl-anilino)pent-3-en-2-one.

Project description:The title enamino ketone, C(12)H(15)NO, a derivative of 4-(phenyl-amino)-pent-3-en-2-one, presents a roughly planar [greatest displacement of an atom from the pentenone plane is 0.033 (2) Å] pentenone backbone, enhanced by an intra-molecular N-H⋯O hydrogen bond; the asymmetry in C-C distances in the group suggests the presence of unsaturated bonds. The overall geometry in the free ligand differs significantly from that in other reported compounds, in which it is coordinated to rhodium; this is reflected in the bond distances [the N⋯O distance is significantly increased (0.2 Å) upon coordination to the metal] and the dihedral angle between the benzene ring and the pentenone backbone [49.53 (5)°]. All of the methyl goups are rotationally disordered over two orientations of equal occupancy.

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3-(4-Bromo-phen-yl)cyclo-pent-2-en-1-one.

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(E)-1,5-Di-phenyl-pent-2-en-4-yn-1-one.

Project description:The title compound, C17H12O, has an E conformation about the C=C bond. The C-C C-C torsion angle is 7.7?(2)°, and the mean planes of the phenyl-ethyl-enone [r.m.s. deviation = 0.059?(1)?Å] and phenyl-acetyl-ene [r.m.s. deviation = 0.023?(1)?Å] fragments form a dihedral angle of 14.16?(7)°. In the crystal, weak C-H?O inter-actions link the mol-ecules into zigzag chains propagated in [010].

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(Z)-4-(2-Hy-droxy-anilino)pent-3-en-2-one.

Project description:In the title compound, C(11)H(13)NO(2), the dihedral angle between the planes defined by the 2-hy-droxy-phenyl-amino group and the pent-3-en-2-one mean plane [maximum deviations = 0.0275 (19) and 0.054 (2) Å, respectively] is 31.01 (10)°. There are intra-molecular bifurcated N-H⋯(O,O) hydrogen bonds involving the amine NH group and the adjacent carbonyl and hy-droxy O atoms. In the crystal, mol-ecules are linked via O-H⋯O hydrogen bonds, forming chains propagating along [100].

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Project description:In the title compound, C(13)H(14)Cl(2)O, the carbonyl and ethenyl groups are coplanar with the aromatic ring. There are four molecules in the asymmetric unit and all atoms in the molecule lie on mirror planes. The mol-ecules are packed in an offset face-to-face arrangement showing ?-? stacking inter-actions involving the benzene rings [centroid-centroid distance = 3.564?(2)?Å].

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