3-{[3-(4-Meth­oxy­phen­yl)-4,5-dihydro-1,2-oxazol-5-yl]meth­yl}-1,5-dimethyl-1H-1,5-benzodiazepine-2,4(3H,5H)-dione

The mol­ecule of the title compound, C22H23N3O4, features a benzodiazepine fused-ring system whose seven-membered ring adopts a boat-shaped conformation (with the C atoms of the fused-ring as the stern and the methine C atom as the prow). The methyl­ene C atom connected to the methine C atom occupies an equatorial position. The methyl­ene C atom is connected to the five-membered oxazole ring, both of which are disordered over two positions in a 0.634 (4):0.366 (4) ratio. Weak inter­molecular C—H⋯O hydrogen bonding is present in the crystal structure

Di-tert-butyl 2,6,11-trioxo-2,3-dihydro-1H-anthra[1,2-d]imidazole-1,3-diacetate

The fused-ring system of the title compound, C27H28N2O7, which comprises one five- and three six-membered rings, is approximately planar (r.m.s. deviation = 0.133 Å), the system being buckled along the axis passing through the O atoms of the anthraquinone portion of the mol­ecule. Within the anthraquinone portion, the two benzene rings are aligned at 7.3 (2)°. In the crystal, one of the tert-butyl groups is disordered over two sets of sites in a 1:1 ratio. Weak inter­molecular C—H⋯O hydrogen bonding is present in the crystal structure

5-Chloro-1-[(E)-3-(dimethyl­amino)­acrylo­yl]-3-methyl-1H-benzimidazol-2(3H)-one–6-chloro-1-[(E)-3-(dimethyl­amino)­acrylo­yl]-3-methyl-1H-benzimid­azol-2(3H)-one (4/1)

In the reaction of 7-chloro-1,5-benzodiazepine-2,4-dione with N,N-dimethyl­formamide/dimethyl­acetal, the diazepine seven-membered ring undergoes a contraction to form the five-membered ring. The reaction yields two isomers the title compound, C13H14ClN3O2; the major component has the chlorine-atom substituent in the 5-position of the benzimidazolone ring and the minor component has the chlorine atom in the 6-position. The two isomers form a disordered co-crystal, the chloro­methyl­benzimidazolone portion of both components are disordered with respect to each other in a 4:1 ratio [the refined ratio is 0.816 (5):0.184 (5)]; the dimethyl­amino­cryloyl substitutent is ordered. The double bond of the dimethyl­amino­acryloyl substituent has an E configuration