The asymmetric unit of the title compound, C(19)H(16)N(2)O(3), contains two independent mol-ecules in which the dihedral angles between the naphthalene ring system and the benzene ring are 10.0 (1) and 35.3 (1)°. In the crystal, mol-ecules are linked by N-H⋯O and O-H⋯O hydrogen bonds, forming a two-dimensional framework parallel to (001). Weak C-H⋯O and C-H⋯N hydrogen bonds complete a three-dim...

In the title compound, C(16)H(14)Cl(2)N(2)O(4)·H(2)O, the hydrazine and water mol-ecules are both located on twofold axes. The C-N-N-C torsion angle is -72.66 (1)° and the dihedral angle between the two benzene rings is 67.33 (1)°. In the crystal, mol-ecules are linked into a layer structure by a combination of O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds. Adjacent layers are linked into a three-dimen...

The asymmetric unit of the title compound, C(23)H(27)Cl(2)N(3)O, contains two crystallographically independent mol-ecules in which the dihedral angles between the benzene rings are 70.1 (3) and 63.8 (3)°. In each mol-ecule an intra-molecular N-H⋯O hydrogen bond generates an S(7) ring. The atoms of the propyl grouping of one mol-ecule are disordered over two orientations with occupancies of 0.66...

The title compound, C(11)H(11)N(3)O(3), was obtained by the reaction of 3-meth-oxy-salicyl-aldehyde with cyano-acetohydrazide in methanol. There is an intra-molecular O-H⋯N hydrogen bond in the mol-ecule. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds, generating chains running along the b axis.

A series of Schiff’s bases i.e., N-(4-(benzylideneamino)-2-phenoxyphenyl)-4-methylbenzene-sulfonamide were synthesized from Nimesulide and studied for their in vivo anti-inflammatory activity. Hydrolysis of Nimesulide with sulphuric acid led to the formation 1 which on further reaction with benzene sulphonyl chloride yielded the title compounds 2. Compounds 2 reduced with tin in presence of con...

In the title compound, C(10)H(10)N(4)O, the dihedral angle between the pyridine ring and the -C=O(CH(2))CN group is 24.08 (12)°. In the crystal, inversion dimers linked by pairs of N-H⋯N hydrogen bonds generate R(2) (2)(8) loops.

The title compound, C(10)H(8)N(4)O(4)·H(2)O, was obtained by the reaction of 5-hy-droxy-2-nitro-benzaldehyde with cyano-acetohydrazide in methanol. The non-H atoms of the hydrazone molecule are approximately coplanar, with a mean deviation from the least-squares plane of 0.056 Å. In the crystal, mol-ecules are linked by N-H⋯O, O-H⋯N and O-H⋯O hydrogen bonds, generating a three-dimensional network.

In the title compound, C(15)H(12)ClN(5)O, the mean planes of the benzotriazole and chloro-phenyl fragments form a dihedral angle of 70.8 (1)°. In the crystal, mol-ecules are linked into infinite chains along the a axis by N-H⋯O hydrogen bonds. Weak inter-molecular C-H⋯N hydrogen bonds further link these chains into layers parallel to the ab plane. The crystal studied was a racemic twin.