2,4-Bis(furan-2-yl)-1,5-dimethyl-3-aza­bicyclo­[3.3.1]nonan-9-one

In the title compound, C₁₈H₂₁NO₃, the bicyclic ring system adopts a twin-chair conformation. The two methyl groups attached to the bicycle are in an equatorial orientation for both rings. One of the furan rings is disordered over two orientations with an occupancy ratio of 0.686 (6):0.314 (6). In the crystal, very long N—H...O hydrogen bonds connect the mol­ecules into a chain perpendicular to the ac plane.

1-(3-Meth­oxy­phen­yl)-4,5-dimethyl-2-phenyl-1H-imidazole

In the title compound, C₁₈H₁₈N₂O, the imidazole ring makes dihedral angles of 68.26 (7) and 22.45 (9)° with the meth­oxy­phenyl and phenyl rings, respectively. The dihedral angle between the meth­oxy­phenyl and phenyl ring is 71.86 (7)°. In the crystal, weak inter­molecular C—H...O and C—H...N hydrogen bonds link the mol­ecules into columns propagated in [101].

2,4-Bis(4-fluoro­phen­yl)-1,5-dimethyl-3-aza­bicyclo­[3.3.1]nonan-9-one

The asymmetric unit of the title compound, C₂₂H₂₃F₂NO, contains two independent mol­ecules, A and B. The bicyclic system adopts a twin-chair conformation in both mol­ecules. The dihedral angles between the fluoro­phenyl rings are 55.27 (8) and 56.37 (7)° in mol­ecules A and B, respectively. The NH groups are not involved in hydrogen bonding due to the steric hindrance of fluoro­phenyl groups. The crystal structure features weak C—H...O inter­actions.