5′-Methyl-4′-oxo-7′-phenyl-3′,4′-dihydro- 1′H-spiro-[cyclo-hexane-1,2′-quinazoline]-8′-carbonitrile

The title compound, C ₂₁H ₂₁N _3O, was obtained by cyclo-condensation of 3-amino-5-methyl-[1,1′-biphen-yl]-2,4- di-car-bo-nitrile with cyclo-hexa-none. The six-membered 1,3-diaza ring assumes an envelope conformation [with the flap atom displaced by 0.511 (7) Å from the plane through the other ring atoms] and the cyclo-hexane ring displays a chair conformation. The dihedral angle between the aromatic rings is 42.61 (7)°.In the crystal, the mol-ecules form hydrogen-bonded bands along [011].