Ethyl 2-[(Z)-3-chlorobenzylidene]-7-methyl-3-oxo-5-phenyl-2,3-dihydro-5H-1,3-thiazolo[3,2-a]pyrimidine-6-carboxylate

In the title compound, C23H19ClN2O3S, the central pyrimidine ring is significantly puckered, assuming almost a screw boat conformation. In addition to the usual intermolecular C—H⋯O hydrogen bonding, short intramolecular C—H⋯S contacts and π–π stacking interactions [centroid–centroid distance = 3.762 (2) Å] contribute to the crystal packing.

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