3′,4′-Diphenyl-3H,4′H-spiro[benzo[b]thiophene-2,5′-isoxazol]-3-one

The molecule of the title compound, C22H15NO2S, is built up from a benzothiophene system linked to an isoxazoline ring which is connected to two phenyl rings. The benzothiophene system is essentially planar, while the isoxazoline ring displays an envelope conformation with the spiro C atom as the flap. The mean plane through the isoxazoline ring is slightly inclined to one phenyl ring by 5.74 (13)° and is approximately perpendicular [86.10 (10)°] to the fused ring system and to the other phenyl ring [84.31 (12)°]. In the crystal, molecules are linked together by C—H...O hydrogen bonds and by π–π interactions between the fused ring systems [intercentroid distance = 3.702 (2) Å], forming a three-dimensional network.