7-(2,4-Dichloro-phen-yl)-2-methyl-sulfanyl-pyrazolo[1,5-a]pyrimidine-3-carbonitrile.

In the mol-ecule of the title compound, C(14)H(8)Cl(2)N(4)S, all the ring atoms in the pyrazolopyrimidine system are almost coplanar, the largest deviation from the mean plane being 0.027 (2) Šfor a C atom. The conformation of the methyl-sulfanyl group is anti-periplanar, with a torsion angle of -176.7 (2)°. A weak inter-molecular C-H⋯N hydrogen bond and a Cl⋯N halogen bond [Cl⋯N = 3.196 (5) Å] with a nearly linear N⋯Cl-C angle [174.2 (1)°] link the mol-ecules into a two-dimensional assembly. Face-to-face π-π stacking, with a centroid-centroid separation of 3.557 (2) Šand an angle of 7.1 (1)° between the two planes, completes the inter-molecular inter-actions in the solid state.

2-Anilino-3-benzoyl-4-(2,5-dichloro-phen-yl)-7,7-dimethyl-5-oxo-5,6,7,8-tetra-hydro-4H-benzo[b]pyran.

The title compound, C(30)H(25)Cl(2)NO(3), was prepared by the reaction of 3-oxo-N,3-diphenyl-propane-thio-amide, 2,5-dichloro-benzaldehyde and 5,5-dimethyl-1,3-cyclo-hexa-nedione (1:1:1) in ethanol. The cyclohexene ring adopts a half-chair conformation. The crystal structure exhibits intra-molecular N-H⋯O and C-H⋯O, and inter-molecular C-H⋯O inter-actions.

7-Chloro-4-(2,5-dichloro-phen-yl)-1-phenyl-1H-thio-chromeno[2,3-b]pyridine-2,5(3H,4H)-dione.

In the crystal structure of the title compound, C(24)H(14)Cl(3)NO(2)S, the tetra-hydro-pyridine ring adopts a half-chair conformation and both pendant benzene rings are oriented nearly perpendicular to the thio-chromeno[2,3-b]pyridine system.