Diethyl 2-{[(5-oxo-5H-thiochromeno[2,3-b]pyridin-7-yl)amino]methylidene}propanedioate

Abstract

In the title compound, C15H14O2S, the three fused rings are roughly coplanar, the largest deviation from the mean plane being 0.1285 (13) Å for the S atom. An intramolecular N—H...O hydrogen bond generates an S6 ring. In the crystal, intermolecular C—H...O hydrogen bonds form R22(14), R22(13) and R32(17) ring motifs, building a layer parallel to (100).