Ethyl 2-(4-carboxybenzylidene)-7-methyl-3-oxo-5-phenyl-2,3-dihydro-5H-thiazolo[3,2-a]pyrimidine-6-carboxylate-N,N-dimethylformamide (1/1)

In the title compound, C24H20N2O5S center dot C3H7NO, a benzene ring is positioned axially to the pyrimidine ring, which adopts a twist-boat conformation, and is inclined to its mean plane by 85.36 (7)degrees. In the crystal, intermolecular C-H center dot center dot center dot O interactions result in centrosymmetric head-to-head dimers with an R-2(2)(14) graph-set motif along the b axis. Pairs of C-H center dot center dot center dot O and O-H center dot center dot center dot O hydrogen bonds form centrosymmetric head-to-head dimers about inversion centres, corresponding to an R-2(2)(7) graph-set motif along the a axis.