1,3-Bis(prop-2-yn-1-yl)-1H-anthra[1,2-d]imidazole-2,6,11(3H)-trione

In the title compound, C₂₁H₁₂N₂O₃, the fused-ring system is roughly planar, the largest deviation from the mean plane being 0.084 (2) Å. The two prop-2-yn-1-yl groups are almost perpendicular to the fused ring plane, making C—C—N—C torsion angles of −103.4 (2) and −105.3 (2)°, and point in opposite directions with respect to the plane. In the crystal, mol­ecules are linked by weak C—H...O hydrogen bonds, forming a three-dimensional network.

1-(Prop-2-en-1-yl)-3-{[3-(pyridin-4-yl)-4,5-di­hydro­isoxazol-5-yl]meth­yl}-1H-anthra[1,2-d]imidazole-2,6,11(3H)-trione

The fused five- and three six-membered rings of the anthra[1,2-d]imidazole­trione part of the title compound, C₂₇H₂₀N₄O₄, show two different substituents at the imidazole N atoms, viz. an allyl group and a [3-(pyridin-4-yl)-4,5-di­hydro­isoxazol-5-yl]methyl group. The fused-ring system is approximately planar [r.m.s. deviation = 0.232 (2) Å], but is slightly buckled along the common edge of the two pairs of adjacent rings, with a dihedral angle between them of 11.17 (6)°. The isoxazole ring makes dihedral angles of 27.2 (2) and 12.7 (2)° with the imidazole and pyridine rings, respectively. Weak C—H...O and C—H...N hydrogen bonds ensure the cohesion of the crystal structure, forming a three-dimensional network.

3-Benzyl-1-{[3-(4-chloro­phen­yl)isoxazol-5-yl]meth­yl}-1H-benzimidazol-2(3H)-one

In the title compound, C₂₄H₁₈ClN₃O₂, the benzimidazole plane is nearly perpendicular to the phenyl ring and to the isoxazole ring, making dihedral angles of 75.95 (7) and 73.04 (8)°, respectively, but the two residues point in opposite directions with respect to the benzimidazole plane. The dihedral angle between the chloro­phenyl and isoxazole rings is 7.95 (8)°. In the crystal, mol­ecules are linked by pairs of C—H...O hydrogen bonds into inversion dimers.