4-tert-Butyl-3′,4′-bis(4-methylphenyl)-3,4-dihydro-1H,4′H-spiro[naphthalene-2,5′-[1,2]oxazol]-1-one

In the title compound, C30H31NO2, the cyclohexanone ring in the naphthalene fused-ring system adopts a half-chair conformation, presumably due to conjugation of the benzene ring. The naphthalene ring system makes dihedral angles of 86.63 (7), 65.15 (8) and 63.18 (8)° with respect to the two methylbenzene planes and the 1,2-oxazole ring system. Intermolecular C—H⋯O and C—H⋯N hydrogen bonding and C—H⋯π interactions stabilize the crystal structure. The H atoms of the two methyl groups of the methylphenyl groups are disordered over two positions with equal occupancies.