organic compounds
Open access
The title compound, C18H22N4O2S, contains a substituted pyrimidine ring fused to both a benzene ring and a substituted thioxopyrimidine ring. The pyrimidine and thioxopyrimidine rings adopt distorted chair conformations. In the crystal, adjacent molecules are linked by pairs of N—HS and N—HO hydrogen bonds to generate centrosymmetric R22(8) and R22(16) loops, respectively. This combination leads to [100] chains of molecules.