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4-[(Z)-(2-Fur-yl)(2-naphthyl-amino)methyl-ene)]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

ABSTRACT: The title compound, C(25)H(19)N(3)O(2), crystallizes as discrete mol-ecules which are well ordered through one intra-molecular N-H?O hydrogen bond. Structural analysis indicates that the mol-ecules exist as the amine-one form.

SUBMITTER: Li J

PROVIDER: S-EPMC2977223 | biostudies-literature | 2009 Jul

REPOSITORIES: biostudies-literature

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4-[(Z)-(2-Fur-yl)(2-naphthyl-amino)methyl-ene)]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

Li Jing J Li Jin-Zhou JZ Li Jing-Qi JQ Zhang Heng-Qiang HQ Li Jia-Min JM

Acta crystallographica. Section E, Structure reports online 20090711 Pt 8

The title compound, C(25)H(19)N(3)O(2), crystallizes as discrete mol-ecules which are well ordered through one intra-molecular N-H⋯O hydrogen bond. Structural analysis indicates that the mol-ecules exist as the amine-one form. ...[more]

PMID: 21583526

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4-[(Z)-Allyl-amino-(phen-yl)methyl-ene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

Project description:The title compound, C(20)H(19)N(3)O, exists in a keto-enamine tautomeric form. The pyrazolone ring makes dihedral angles of 20.52?(10) and 77.73?(5)° with the two phenyl rings and an intra-molecular N-H?O hydrogen bond occurs. A weak inter-molecular C-H?O hydrogen bond is observed in the crystal structure. The allyl group is disordered over two positions, with site-occupancy factors of 0.533?(5) and 0.467?(5).

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4-{(Z)-(sec-Butyl-amino)(phen-yl)methyl-ene}-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

Project description:In the title compound, C(21)H(23)N(3)O, the dihedral angles formed by the pyrazolone ring with two phenyl rings are 10.38?(8) and 76.94?(6)°. The sec-butyl-amino group is disordered over two positions, with refined site-occupancy factors of 0.730?(4) and 0.270?(4). The compound could potentially be ligand stabilized in the solid state in a keto-enamine tautomeric form. The amine functionality is involved in an intra-molecular N-H?O hydrogen bond, while weak inter-molecular C-H?O and C-H?N hydrogen bonds participate in the formation of the crystal structure.

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(4Z)-4-[(Cyclo-propyl-amino)(phen-yl)methyl-ene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

Project description:In the title compound, C(20)H(19)N(3)O, the dihedral angles formed by the pyrazolone ring with the two phenyl rings are 64.27?(6) and 17.00?(6)°. The mol-ecular structure is stabilized by intra-molecular N-H?O and C-H?O hydrogen bonds. In the crystal, the mol-ecules are linked into chains along the b axis by inter-molecular C-H?O hydrogen bonds.

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(4Z)-4-[(4-Methoxy-benzyl-amino)(phen-yl)methyl-ene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

Project description:In the title compound, C(25)H(23)N(3)O(2), the dihedral angles formed by the pyrazolone ring with the three aromatic rings are 14.59?(7), 79.35?(5) and 87.10?(6)°. Three intra-molecular C-H?O, C-H?N and N-H?O hydrogen-bond inter-actions are present. The crystal structure is stabilized by two weak inter-molecular C-H?O and C-H?N hydrogen-bond inter-actions.

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4-[(Z)-(n-Butyl-amino)(phenyl)methyl-idene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

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(4Z)-4-[(4-Chloro-anilino)(phen-yl)methyl-ene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

Project description:The title compound, C(23)H(18)ClN(3)O, was synthesized by the reaction of 4-chloro-aniline and 4-benzoyl-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one. The terminal benzene rings are twisted at dihedral angles of 48.3?(2), 71.4?(2) and 36.1?(2)° with respect to the central eight-atom methyl-pyrazolone/amino-methyl-ene unit. An intra-molecular N-H?O hydrogen bond stabilizes the planar conformation [mean deviation = 0.0398?(5)?Å] of the central unit, generating an S(6) ring motif. The crystal packing is stabilized by van der Waals forces.

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(Z)-4-[(2-Amino-4,5-dichloro-anilino)(phenyl)methyl-idene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

Project description:The mol-ecule of the title compound, C(23)H(18)Cl(2)N(4)O, assumes a non-planar conformation in which the pyrazolone ring forms dihedral angles of 32.61?(19), 76.73?(14) and 52.57?(19)° with the three benzene rings. The secondary amino group is involved in an intra-molecular N-H?O hydrogen bond. In the crystal, mol-ecules are linked by pairs of N-H?O hydrogen bonds, forming inversion dimers. An offset stacking inter-action is observed between the chloro-substituted benzene rings protruding on both sides of these dimers [centroid-centroid distance = 3.862?(1)?Å].

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1,5-Dimethyl-4-[(5-methyl-2-furyl)-methyl-ene-amino]-2-phenyl-1H-pyrazol-3(2H)-one.

Project description:In the title compound, C(17)H(17)N(3)O(2), a derivative of 4-amino-anti-pyrine, the structure displays a trans configuration with respect to the imine C=N double bond. The pyrazoline ring is essentially planar and makes a dihedral angle of 55.80?(1)° with the phenyl ring.

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(Z)-4-[(2-Amino-anilino)(phen-yl)methyl-idene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

Project description:The mol-ecule of the title compound, C(23)H(20)N(4)O, assumes a non-planar conformation in which the pyrazolone ring forms dihedral angles of 10.33?(11), 65.34?(11) and 63.52?(10)° with the three benzene rings. In the crystal, the mol-ecules are linked by inter-molecular N-H?N hydrogen bonds, generating chains parallel to the b axis. The secondary amino group is involved in an intra-molecular N-H?O hydrogen bond.

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(Z)-4-[(Ethyl-amino)(furan-2-yl)methyl-idene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

Project description:In the crystal of the title compound, C(17)H(17)N(3)O(2), the mol-ecules exist in the keto-enamine form. The pyrazole ring is oriented at 10.59?(4) and 57.98?(5)° to the phenyl and furyl rings, respectively, and the dihedral angle between phenyl and furyl rings is 73.30?(11)°. An intra-molecular N-H?O hydrogen bond occurs between imino and carbonyl groups. In the crystal, weak C-H?O hydrogen bonds link the mol-ecules into supra-molecular chains along the b axis.

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