(Z)-4-{1-[(2-Hy­droxy­ethyl)­amino]­ethyl­idene}-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one

In the title compound C14H17N3O2, the dihedral angle between the rings is 16.68 (13)°. Although the compound crystallizes in the keto form, the possibility of keto-enamine–enol-imine tautomerism is explained by a strong intra­molecular N—H⋯O hydrogen bond

(E)-2-({2-[(E)-(Hy­droxy­imino)­meth­yl]phen­oxy}meth­yl)-3-p-tolyl­acrylonitrile

In the title compound, C18H16N2O2, the hy­droxy­ethanimine group is essentially coplanar with the ring to which it is attached (C—C—N—O torsion angle = −176.9°). Mol­ecules are linked into cyclic centrosymmetric R 2 2(6) dimers via O—H⋯N hydrogen bonds

2-Hy­droxy­ethyl 4-hy­droxy­benzoate

In the title compound, C9H10O4, the dihedral angle between the benzene ring and the –CO2 unit is 11.93 (8)° and the conformation of the 2-hy­droxy­ethyl side chain is gauche [O—C—C—O = −71.91 (17)°]. In the crystal, mol­ecules are linked by O—H⋯O and C—H⋯O hydrogen bonds

Methyl (E)-2-({2-[(E)-(hy­droxy­imino)­meth­yl]phen­oxy}meth­yl)-3-phenyl­acrylate

In the title compound, C18H17NO4, the hy­droxy­ethanimine group is essentially coplanar with the ring to which it is attached [C—C—N—O torsion angle = 179.94 (14)°]. The mol­ecules are linked into cyclic centrosymmetric R 2 2(6) dimers via O—H⋯N hydrogen bonds and the crystal packing is further stabilized by C—H⋯O inter­actions

Diethyl [benzyl­amino­(1,3-diphenyl-1H-pyrazol-4-­yl)meth­yl]phospho­nate

In the title compound, C27H30N3O3P, the pyrazole ring is essentially planar [maximum deviation = 0.002 (2) Å] and it forms dihedral angles of 9.3 (1) and 40.2 (1)°, respectively, with the phenyl rings attached to the N and C atoms. In the crystal, pairs of centrosymmetrically related mol­ecules are linked into dimers by N—H⋯O hydrogen bonds

(2E,4E)-Ethyl 5-(phenyl­sulfon­yl)penta-2,4-dienoate

In the title compound, C13H14O4S, both C=C double bonds adopt an E conformation. In the crystal, mol­ecules are linked into centrosymmetric R 2 2(14) dimers via pairs of C—H⋯O hydrogen bonds

3-[(Z)-Benzyl­idene]-2,3-dihydro-1,5-benzothia­zepin-4(5H)-one

In the title compound, C16H13NOS, the seven-membered ring adopts a distorted half-chair conformation. In the crystal, mol­ecules are linked by N—H⋯O hydrogen bonds, forming chains running along the b axis. The crystal packing is further stabilized by C—H⋯O inter­actions

Diethyl [(2-bromo­anilino)(1,3-diphenyl-1H-pyrazol-4-yl)meth­yl]phospho­nate

In the title compound, C26H27BrN3O3P, the central pyrazole ring forms a dihedral angle of 71.7 (2)° with the bromo­phenyl ring. In the crystal, mol­ecules are linked by pairs of N—H⋯O hydrogen bonds, forming inversion dimers with R 2 2(10) ring motifs. Four C atoms of the 3-phenyl ring are disordered over two sets of sites [site occupancies = 0.745 (6) and 0.225 (6)]

Ethyl 2-benzyl-3-[3-(4-chloro­phen­yl)-1-phenyl-1H-pyrazol-4-yl]-4,6-dioxo-5-phenyl­octa­hydro­pyrrolo­[3,4-c]pyrrole-1-carboxyl­ate

The title compound, C37H31ClN4O4, crystallizes with two mol­ecules (A and B) in the asymmetric unit. The pyrrole rings in both mol­ecules are connected via cis fusion, whereas one ring has a twisted conformation and the other assumes a half-chair conformation. In the crystal, the A mol­ecules form inversion dimers via a pair of C—H⋯Cl inter­actions, while the B mol­ecules form chains propagating in [10], via C—H⋯O inter­actions. In the crystal, there are also a number of C—H⋯π inter­actions present