Crystal structure of ethyl 6-methyl-2-sulfanylidene-4-(thiophen-2-yl)-1,2,3,4-tetrahydropyrimidine-5-carboxylate

In the title compound, C12H14N2O2S2, the dihydropyrimidine ring adopts a sofa conformation, with the C atom bearing the thienyl ring lying above the plane of the five remaining approximately coplanar (r.m.s. deviation = 0.0405 angstrom) atoms of the ring. The dihedral angle between the five near coplanar atoms of the ring and the thienyl ring is 89.78 (11)degrees. In the crystal, molecules are linked into a supramolecular chain along [100] via N-H center dot center dot center dot O(carbonyl) hydrogen bonds. Inversion- related chains are linked into double chains via N-H center dot center dot center dot S(thione) hydrogen bonds. The three-dimensional architecture also features methyl-thienyl C-H center dot center dot center dot pi interactions.