3-(4-Methoxybenzyl)-1,5-benzo­thiazepin-4(5H)-one

In the title compound, C17H15NO2S, the thia­zepine ring adopts a slightly distorted twist-boat conformation. The dihedral angle between the mean plane of the benzo­thia­zepin ring system and the benzene ring is 65.7 (1)°. In the crystal, pairs of N—H⋯O hydrogen bonds link inversion-related mol­ecules into dimers, generating R22(8) ring motifs. These dimers are further linked by C—H⋯π and π–π inter­actions [inter-centroid distance between the benzene rings of the benzo­thia­zepine unit = 3.656 (3) A] into a three-dimensional supra­molecular network.