Jin-Long Wu

N-Benzyl-2-(2-bromo­phen­yl)-2-(2-nitro­phen­oxy)acetamide

The title compound, C21H17BrN2O4, a 2-phenoxy-2-phenylacetamide derivative, exhibits a stereogenic center but crystallizes as a racemate as indicated by the centrosymmetric space group. In the molecular structure, the nitro-substituted benzene ring is coplanar [dihedral angle = 12.9 (1)°] with the plane formed by H—N—C(=O)—C=O due to intramolecular N—H⋯O hydrogen-bond interactions.

N-Cyclo-hexyl-2-oxo-2-phenyl-acetamide.

In the title compound, C14H17NO2, the two carbonyl groups are oriented with respect to each other with a torsion angle of −129.9 (3)°. The cyclohexane ring adopts a chair conformation. In the crystal, molecules are linked by N—H⋯O hydrogen bonds into a chain running along the a axis.

2-(2-Chloro­phen­yl)-2-oxo-N-phenyl­acetamide

In the title compound, C14H10ClNO2, the dihedral angle between the two rings is 59.4 (2)°. The two carbonyl groups are oriented almost antiperiplanar to each other, with a torsion angle of −160.43 (2)°. In the crystal, molecules are linked into inversion dimers by pairs of N—H⋯O hydrogen bonds.

2-(2-Chloro­phen­yl)-N-cyclo­hexyl-2-oxoacetamide

In the title compound, C14H16ClNO2, the cyclohexyl ring has a chair conformation. The dihedral angle between the benzene ring and the mean plane of the four planar C atoms of the cyclohexyl ring is 45.2 (3)°. The two carbonyl groups are trans to one another, with an O=C—C=O torsion angle of −137.1 (3)°. In the crystal, molecules are linked by N—H⋯O hydrogen bonds forming chains propagating along [001]. A region of disordered electron density, situated near the unit-cell corners, was treated using the SQUEEZE routine in PLATON [Spek (2009 ▶). Acta Cryst. D65, 148–155]. It gave a solvent-accessible void of ca 400 Å3 for only 21 electrons. It is probably due to traces of the solvent of crystallization and was not taken into account during structure refinement.

rac-7-[(2E)-But-2-eno-yl]-13-chloro-N-cyclo-hexyl-7,8-dihydro-5H-isochromeno[4,3-c]phenanthridine-8-carboxamide.

In the title compound, C31H29ClN2O3, the two heterocyclic rings, belonging to a system of five condensed rings, adopt conformations intermediate between twist-boat and sofa. The secondary amide group is involved in a weak intramolecular N—H⋯N hydrogen bond. In the crystal, molecules are linked by pairs of C—H⋯Cl hydrogen bonds to form inversion dimers. These dimers are linked via a C—H⋯O interaction to form chains propagating along the b-axis direction.

Ethyl 4-methyl-1,3-dioxo-1,2,3,4-tetra-hydro-isoquinoline-4-carboxyl-ate.

In the title compound, C13H13NO4, the fused-ring system is nearly planar, with an r.m.s. deviation of 0.0408 Å. In the crystal, molecules are linked into centrosymmetric dimers by a pair of N—H⋯O hydrogen bonds. The ethyl group is disordered over two positions in a ratio of 0.758 (6):0.242 (6).

(3aR*,6S*,7S*,7aR*)-2-(4-Methoxy­benz­yl)-7-(4-nitro­phen­yl)-6-phenyl-3a,6,7,7a-tetra­hydro­isoindolin-1-one

The title compound, C28H26N2O4, crystallizes as a racemate with four stereogenic centers. In the molecule, the pyrrolidone ring adopts an envelope conformation and the cyclohexene ring has a twisted envelope conformation. In the crystal structure, molecules are linked by weak intermolecular C—H⋯O hydrogen bonds.

Ethyl (4aR*,7S*,8S*,8aS*)-1-oxo-7-phenyl-3,4,4a,7,8,8a-hexa­hydro-1H-isochromene-8-carboxyl­ate

In the title compound, C18H20O4, both the tetrahydropyranone ring and the cyclohexene ring adopt envelope conformations. The crystal packing is stabilized by weak intermolecular C—H⋯O hydrogen bonding.

2-(4-Hydroxy-biphenyl-3-yl)isoindolin-1-one.

In the molecular structure of the title compound, C20H15NO2, the isoindolin-1-one unit is planar, the maximum atomic deviation being 0.048 (2) Å. The two biphenyl rings are twisted with respect to the isoindolin-1-one plane, making dihedral angles of 33.21 (9) and 33.34 (9)°. The two benzene rings of the biphenyl substituent are oriented at a dihedral angle of 35.43 (11)° to each other. An intramolecular O—H⋯O interaction occurs and intermolecular C—H⋯O hydrogen bonding is present in the crystal structure.

N-Cyclo­hexyl-5H,7H-13,15-dimethyl-9-nitro-5-oxophenanthrido[4,4a,5-bc][1,4]benzoxazepine-7-carboxamide

In the title compound, C29H27N3O5, a dibenz[b,f][1,4]oxazepine derivative, the cyclohexane ring adopts a chair conformation, the oxazepine seven-membered ring has a twist-boat conformation, and the piperidin-2-one ring assumes a flattened boat conformation. Intermolecular N—H⋯O hydrogen bonding between imino and nitro groups links two molecules into a centrosymmetric dimer.