The title compound, C32H28Cl2N2O2, was synthesized by a multicomponent reaction of 4-chloro-benzaldehyde, aniline and ethyl aceto-acetate. The central 1,2,5,6-tetra-hydro-pyridine ring exhibits a distorted boat conformation and the two chloro-phenyl rings attached to the central ring at positions 2 and 6 are oriented in opposite directions. The two O atoms of the eth-oxy-carbonyl group are invo...

In the structure of the phenolate salt of the sulfa drug sulfamethazine with 3,5-dinitro-salicylic acid, C12H15N4O2S(+)·C7H3N2O7 (-), the dihedral angle between the pyrimidine and benzene rings of the cation is 59.70 (17)°. In the crystal, cation-anion hydrogen-bonding inter-actions involving pyrim-idine-carb-oxy N(+)-H⋯O and amine-carb-oxy N-H⋯O pairs give a cyclic R 2 (2)(8) motif while secon...

In the title compound, C(15)H(13)N(3)O(3), the dihedral angle formed by the two benzene rings is 44.23 (2)°. The crystal structure is stabilized by aromatic π-π stacking inter-actions, with centroid-centroid distances of 3.825 (3) and 3.870 (4) Å between the aniline and the nitro-benzene rings of neighbouring mol-ecules, respectively. In addition, the stacked mol-ecules exhibit inter-molecular ...

In the mol-ecular structure of the title compound, C(14)H(12)ClNO, the meta-Cl atom in the benzoyl ring is positioned syn to the C=O bond, while the meta-methyl group in the aniline ring is positioned anti to the N-H bond. The two aromatic rings make a dihedral angle of 77.4 (1)°. In the crystal, the molecules are linked by N-H⋯O hydrogen bonds, forming C(4) chains propagating in [010].

The structure of the 1:1 proton-transfer compound of 4-chloro-aniline with 4,5-dichloro-phthalic acid (DCPA), viz. C(6)H(7)ClN(+)·C(8)H(3)Cl(2)O(4) (-), has been determined at 130 K. The non-planar hydrogen phthalate anions and the 4-chloro-anilinium cations form two-dimensional O-H⋯O and N-H⋯O hydrogen-bonded substructures which have no peripheral extension. Between the sheets there are weak π...

The CuX (X = I, Br, Cl, CN)-mediated cyclization-halogenation and cyclization-cyanation reactions of beta-hydroxyalkynes and o-alkynylphenol and -aniline derivatives give rise to 3-halo- and 3-cyanofuro[3,2-b]pyrroles, 3-iodo-, 3-bromo-, and 3-cyanobenzofurans, and 3-cyanoindoles, respectively.

Mol-ecules of the title compound, C(16)H(19)NO(2)S, are bent at the S atom with a C-SO(2)-NH-C torsion angle of -60.0 (2)°. The dihedral angle between the phenyl-sulfonyl and aniline rings is 41.7 (1)°. In the crystal, mol-ecules are packed into centrosymmetric dimers through pairs of N-H⋯O(S) hydrogen bonds.

The title Schiff base compound, C(15)H(14)BrNO(2), was prepared by the condensation of 2,3-dimeth-oxy-benzaldehyde with 4-bromo-aniline. It adopts an E configuration with respect to the C=N bond. The dihedral angle between the two aromatic rings is 56.79 (8)°. Weak C-H⋯O and C--H⋯π bonds can be found in the crystal structure.

In the title compound, C(14)H(13)Cl(2)NO(2)S, the C-SO(2)-NH-C torsion angle is -60.84 (18). The sulfonyl and the aniline benzene rings are tilted relative to each other by 66.4 (1)°. The crystal structure features inversion-related dimers linked by pairs of N-H⋯O hydrogen bonds.