2-Butyl-1,3-diphenyl-2,3-dihydro-1H-naphtho[1,2-e][1,3]oxazine

8-Bromo-1,3-diphenyl-2,3-dihydro-1H-naphtho-[1,2-e][1,3]oxazine

The title compound, C(24)H(18)BrNO, consists of an envelope-configured oxazine ring with a fused 8-bromo-1,3-diphenyl group and two bonded phenyl rings. The dihedral angles between the mean planes of the 8-bromo-1,3-diphenyl and the phenyl rings are 54.5 (6) and 87.4 (8)°, respectively. The oxazine is essentially coplanar with the 8-bromo-1,3-diphenyl [dihedral angle = 9.4 (1)°]. Weak C-H⋯π inter-actions contribute to the crystal packing.

2-Benzyl-1,3-diphenyl-2,3-dihydro-1H-naphtho[1,2-e][1,3]oxazine

In the title compound, C₃₁H₂₅NO, the oxazine ring adopts a half-chair conformation. The dihedral angles between the phenyl rings and the naphthyl ring system are 70.89 (8), 37.34 (10) and 9.42 (10)°. The crystal structure is stabilized by an aromatic π–π stacking inter­action, with a centroid–centroid distance of 3.879 (3) Å.