(3Z,3′Z)-3,3′-(3,5-Dimethyl­furan-2,4-diyl)bis­(4-hy­droxy­pent-3-en-2-one)

In the title mol­ecule, C₁₆H₂₀O₅, the two 4-hy­droxy­pent-3-en-2-one units are essentially planar, with r.m.s. deviations of 0.0183 (2) and 0.0134 (2) Å for the non-H atoms, and make dihedral angles of 81.20 (10) and 84.44 (10)° with the central furan ring. The dihedral angle between these two side units is 22.06 (9)°. Two intra­molecular O—H...O hydrogen bonds generate two S(6) ring motifs. A weak inter­molecular C—H...O inter­action is also observed.

Absolute configuration of (1S,2S)-3-methyl-2-phenyl-2,3-dihydro­thia­zolo[2,3-b]quinazolin-5-one

The absolute structure of the molecule in the crystal of the title compound, C₁₇H₁₄N₂OS, was determined by the refinement of the Flack parameter to 0.0 (2) based on 1011 Friedel pairs. The quinazoline ring is essentially planar, with a maximum deviation of 0.037 (2) Å. The thia­zole ring is distorted from planarity [maximum deviation = 0.168 (2) Å] and adopts a slightly twisted envelope conformation, with the C atom as the flap atom. The central thia­zole ring makes dihedral angles of 7.01 (8) and 76.80 (10)° with the quinazoline and phenyl rings, respectively. The corresponding angle between the quinazoline and phenyl rings is 3.74 (9)°. In the crystal, there are no classical hydrogen bonds but stabilization is provided by weak C—H...π inter­actions, involving the centroids of the phenyl rings.

(E)-4-Amino-N-(1,2-dihydro­pyridin-2-yl­idene)benzene­sulfonamide nitro­methane monosolvate

In the title solvate, C₁₁H₁₁N₃O₂S·CH₃NO₂, the dihedral angle between the benzene ring and the N-containing ring is 85.94 (11)°, and an approximate V shape arises for the sulfonamide mol­ecule. In the crystal, N—H...O and N—H...N hydrogen bonds and weak C—H...O inter­actions link the sulfonamide mol­ecules into a three-dimensional network. The nitro­methane solvent mol­ecules are located in the inter­stitial sites in the sulfonamide network.

3-[(1-Hy­droxy-1-phenyl­propan-2-yl)amino]-5,5-dimethyl­cyclo­hex-2-enone

The asymmetric unit of the title compound, C₁₇H₂₃NO₂, consists of two crystallographically independent mol­ecules (A and B). The cyclo­hexene rings in both mol­ecules adopt an envelope conformation. In the crystal, independent mol­ecules, A and B, are each linked by inter­molecular bifurcated (N,O)—H...O hydrogen bonds, generating R₂¹(7) ring motifs and forming infinite chains along the b axis.

1-(3-Ethyl­phen­yl)-4,6-dimethyl-2-oxo-1,2-dihydro­pyridine-3-carbonitrile

In the title compound, C₁₆H₁₆N₂O, the essentially planar 1,2-dihydro­pyridine ring [maximum deviation = 0.021 (1) Å] makes a dihedral angle of 85.33 (8)° with the benzene ring. In the crystal, mol­ecules are linked into a chain along the b axis via C—H...O inter­actions.

(E)-3-Dimethyl­amino-1-(2,5-dimethyl­thio­phen-3-yl)prop-2-en-1-one

In the title compound, C₁₁H₁₅NOS, the 3-(dimethyl­amino)­prop-2-en-1-one unit is approximately planar [maximum deviation = 0.0975 (14) Å] and its mean plane of seven non-H atoms makes a dihedral angle of 6.96 (10)° with the thio­phene ring. In the crystal, mol­ecules are linked by pairs of C—H...O hydrogen bonds into inversion dimers with R₂²(14) ring motifs. The dimers are stacked along the c axis through C—H...π inter­actions. The two methyl groups, attached to the thio­phene ring and the amino N atom, are each disordered over two orientations, with site-occupancy ratios of 0.59 (4):0.41 (4) and 0.74 (4):0.26 (4), respectively.

Ethyl 2-amino-4,5-dimethyl­thio­phene-3-carboxyl­ate

In the title compound, C₉H₁₃NO₂S, the mean planes of thio­phene ring [maximum deviation = 0.0042 (10) Å] and eth­oxy­carbonyl group [0.0242 (15) Å] are almost coplanar [dihedral angle between them = 0.68 (11)°]. The H atoms of the two methyl groups attached to the thio­phene ring are each disordered over two orientations with site-occupancy ratios of 0.77 (4):0.23 (4) and 0.84 (4):0.16 (4). An intra­molecular N—H...O hydrogen bond generates an S(6) ring motif. In the crystal, mol­ecules are linked by N—H...O hydrogen bonds into an infinite wave-like chain running parallel to the b-axis direction. The crystal structure also features C—H...π inter­actions.

4-[(5,5-Dimethyl-3-oxocyclo­hex-1-en­yl)amino]­benzene­sulfonamide

In the title compound, C₁₄H₁₈N₂O₃S, the cyclo­hexene ring exhibits a distorted half-chair conformation and its mean plane makes a dihedral angle of 46.18 (8)° with the benzene ring. In the crystal, mol­ecules are linked via N—H...O, N—H...(O,O) and C—H...O hydrogen bonds, forming a three-dimensional network.

4-{[7-(Trifluoro­meth­yl)quinolin-4-yl]amino}­benzene­sulfonamide–ethanol–methanol (1/0.47/0.53)

In the title compound, C₁₆H₁₂F₃N₃O₂S·0.47C₂H₅OH·0.53CH₃OH, the quinoline ring system is approximately planar, with a maximum deviation of 0.035 (3) Å, and makes a dihedral angle of 52.67 (9)° with the benzene ring. The F atoms of the –CF₃ group are disordered over two orientations, with refined site occupancies of 0.56 (2) and 0.44 (2). A single solvate site is occupied at random by ethanol or methanol, with refined site occupancies of 0.470 (6) and 0.530 (6), respectively. In the crystal, mol­ecules are linked via N—H...O, N—H...N, O—H...O and C—H...O hydrogen bonds, thereby forming sheets lying parallel to (010).