8,8-Dimethyl-5-(4-methyl-phen-yl)-8,9-dihydro-pyrimido[4,5-b]quinoline-2,4,6(1H,3H,7H)-trione N,N-dimethyl-formamide solvate.

Abstract

The title compound, C20H19N3O3·C3H7NO, was synthesized by the reaction of 6-amino­pyrimidine-2,4(1H,3H)-dione and 4-methyl­benzaldehyde with 5,5-dimethyl-1,3-cyclo­hexa­nedione in 1-butyl-3-methyl­imidazolium bromide at 363 K. The pyrimidine ring adopts a half-chair conformation while the six-membered ring fused to the pyridine ring adopts a skew-boat conformation. The dihedral angle between the pyridine ring and the attached benzene ring is 2.38(8)°