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

ABSTRACT: In the title compound, C(25)H(22)N(4)O(2), the dihedral angles between the central pyrazole ring and the phenyl and benzene rings are 37.01 (3), 75.58 (7) and 49.67 (8)°. An intra-molecular N-H⋯O hydrogen bond generates an S(6) motif. In the crystal, N-H⋯O hydrogen bonds link mol-ecules into a zigzag chain extended along the b axis.

SUBMITTER: Zhi LH

PROVIDER: S-EPMC3393943 | biostudies-literature |

REPOSITORIES: biostudies-literature

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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.

| S-EPMC3201420 | biostudies-literature

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

Project description:The title compound, C(23)H(18)ClN(3)O, exists in an enamine-keto form with the amino group involved in an intra-molecular N-H?O hydrogen bond. The five-membered ring is nearly planar, the largest deviation being 0.0004?(7)?Å, and makes dihedral angles of 16.62?(6), 41.89?(5) and 71.27?(4)° with the phenyl rings. In the crystal, weak C-H?O hydrogen bonds link the mol-ecules into supra-molecular chains along the b axis.

| S-EPMC3379412 | biostudies-literature

(4Z)-4-[(2,6-Diisopropyl-anilino)(phen-yl)methyl-idene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

Project description:In the title compound, C(29)H(31)N(3)O, the three terminal benzene rings are oriented at dihedral angles of 20.7 (3), 65.8 (3) and 72.6 (3)° with respect to the central pyrazolone ring. Intra-molecular N-H⋯O hydrogen bonding occurs between the imine and carbonyl groups. Inter-molecular C-H⋯π inter-actions are present in the crystal structure.

| S-EPMC3051710 | biostudies-literature

(Z)-3-Methyl-4-[1-(4-methyl-anilino)propyl-idene]-1-phenyl-1H-pyrazol-5(4H)-one.

Project description:In the title mol-ecule, C20H21N3O, the central pyrazole ring forms dihedral angles of 4.75 (9) and 49.11 (9)°, respectively, with the phenyl and methyl-substituted benzene rings. The dihedral angle between the phenyl and benzene rings is 51.76 (8)°. The amino group and carbonyl O atom are involved in an intra-molecular N-H⋯O hydrogen bond. In the crystal, π-π inter-actions are observed between benzene rings [centroid-centroid seperation = 3.892 (2) Å] and pyrazole rings [centroid-centroid seperation = 3.626 (2) Å], forming chains along [111]. The H atoms of the methyl group on the p-tolyl substituent were refined as disordered over two sets of sites in a 0.60 (4):0.40 (4) ratio.

| S-EPMC3793766 | biostudies-literature

(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].

| S-EPMC3515247 | biostudies-literature

(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.

| S-EPMC2980146 | biostudies-literature

Crystal structure of (Z)-4-[1-(4-acetyl-anilino)ethyl-idene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

Project description:In the solid state, the title compound, C20H19N3O2, adopts the keto-amine tautomeric form, with the H atom attached to the N atom, which participates in an intra-molecular N-H⋯O hydrogen bond with an S(6) ring motif. The dihedral angles between the pyrazole ring and the phenyl and benzene rings are 3.69 (10) and 46.47 (9)°, respectively. In the crystal, mol-ecules are linked by weak C-H⋯O hydrogen bonds, generating C(16) chains propagating in [301]. Weak aromatic π-π stacking inter-actions [centroid-centroid distances = 3.6123 (10) and 3.6665 (10) Å] link the chains into a three-dimensional network.

| S-EPMC4331847 | biostudies-literature

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

Project description:The title compound, C(21)H(23)N(3)O, exists in an enamine-keto form with the amino group involved in an intra-molecular N-H⋯O hydrogen bond. The dihedral angle between the phenyl rings is 73.59 (6)°. The five-membered ring is nearly planar, the largest deviation being 0.0004 (7) Å, and makes dihedral angles of 4.81 (6) and 69.81 (5)° wth the phenyl rings. In the crystal, pairs of weak C-H⋯O inter-actions link the mol-ecules into centrosymmetric dimers.

| S-EPMC3343944 | biostudies-literature

4-[(3-Hy-droxy-anil-ino)-(phenyl)-methyl-idene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

Project description:In the title compound, C(23)H(19)N(3)O(2), the dihedral angles formed by the pyrazolone ring with the three benzene rings are 30.91?(6), 60.96?(4) and 57.01?(4)°. The ligand is in the enamine-keto form and its structure is stabilized by an intra-molecular N-H?O hydrogen bond. In the crystal, O-H?N hydrogen bonds link mol-ecules into chains parallel to [01-1].

| S-EPMC3379466 | biostudies-literature

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

Project description:The mol-ecule of the title compound, C(27)H(22)N(4)O, assumes a non-planar conformation in which the pyrazolone ring forms dihedral angles of 12.73 (11), 65.17 (6) and 49.82 (6)°, respectively, with the two benzene rings and the naphthalene ring system. In the crystal, pairs of mol-ecules are linked by inter-molecular N-H⋯N hydrogen bonds, forming dimers. The secondary amino group is involved in an intra-molecular N-H⋯O hydrogen bond.

| S-EPMC3435809 | biostudies-literature

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