Acta Cryst. (2007). E63, o3931  [ doi:10.1107/S1600536807042389 ]

6-(4-Chlorophenyl)-9,9-dimethyl-3,7-dioxo-2,3,4,6,7,8,9,10-octahydro-1H-pyrimido[1,2-a]quinoline-5-carbonitrile

D.-Q. Chen, C.-M. Li and S.-J. Tu

Abstract: The title compound, C₂₁H₂₀ClN₃O₂, was synthesized by the reaction of 4-chlorobenzaldehyde and 3-(5,5-dimethyl-3-oxocyclohex-1-enylamino)propanoic acid with malononitrile in ethylene glycol under microwave irradiation. The dihydropyridine ring has a boat conformation. The pyrimidine ring adopts a screw-boat conformation and the cyclohexene ring is in an envelope conformation. In the crystalline state, centrosymmetrically related molecules form dimeric pairs through N-HN hydrogen bonding. Weak C-HO hydrogen bonds are also observed.

Online 1 September 2007

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