5,6-Dimethyl-4-(thio­phen-2-yl)-1H-pyrazolo­[3,4-b]pyridin-3-amine

In the title mol­ecule, C₁₂H₁₂N₄S, the thio­phene ring is disordered over two orientations with a refined site-occupancy ratio of 0.777 (4):0.223 (4). The pyrazolo­pyridine ring system is essentially planar with an r.m.s. deviation of 0.0069 (3) Å and makes dihedral angles of 82.8 (2) and 72.6 (5)°, respectively, with the major and minor components of the thio­phene ring. In the crystal, mol­ecules are linked into a chain along the a axis by a pair of N—H...N(pyrazole) hydrogen bonds and a pair of N—H...N(pyridine) hydrogen bonds, both having a centrosymmetric R₂²(8) graph-set motif. A C—H...π inter­action is also present.

3-(1H-Imidazol-1-yl)-1-phenyl­propan-1-ol

In the title compound, C₁₂H₁₄N₂O, the imidazole ring forms a dihedral angle of 66.73 (5)° with the phenyl ring. In the crystal, mol­ecules are linked via O—H...N and C—H...O hydrogen bonds into sheets lying parallel to (100). The crystal structure is further consolidated by C—H...π inter­actions.

1-(4-Methyl­phen­yl)-2-(phenyl­sulfon­yl)ethanone

In the title compound, C₁₅H₁₄O₃S, the benzene and phenyl rings make a dihedral angle of 33.56 (16)°. In the crystal, mol­ecules are linked by C—H...O hydrogen bonds into a layer parallel to the ab plane.

(Z)-1-(4-Methyl­phen­yl)-2-(phenyl­sulfon­yl)ethanone oxime

The mol­ecule of the title compound, C₁₅H₁₅NO₃S, has a twisted U-shaped conformation: the twist occurs at the central C—S(=O)₂—C—C—C unit and the benzene ring makes a dihedral angle of 28.74 (7)° with the phenyl ring. The S—C—C=N torsion angle is −88.95 (13)°. In the crystal, inversion dimers linked by pairs of O—H...N hydrogen bonds generate R₂²(6) loops, and C—H...O hydrogen bonds connect the dimers into a three-dimensional network.