Crystal structure of diethyl 2-[(2-sulfan­yl­quinolin-3-yl)methyl­idene]malonate

In the title compound, C(17)H(17)N O(4)S, the quinoline ring system is nearly planar, with a maximum deviation of 0.0496 (16) Å. A weak intra­molecular C—H⋯O inter­action is observed. In the crystal, C—H⋯O, S—H⋯N and π–π stacking inter­actions between the fused benzene ring of quinoline and the pyridine moieties [shortest centroid–centroid distance = 3.6754 (11) Å] are observed. Inversion-related weak C—H⋯O inter­molecular inter­actions diagonally along [010], with R (2) (2)(10) ring motifs, and S—H⋯N inter­molecular inter­actions diagonally along [100], with R (2) (2)(8) ring motifs, are present, forming a three-dimensional network structure. No classical hydrogen bonds are observed.