N-[2-(Aminocarbonyl)phenyl]-4-hydroxy-2H-1,2-benzothiazine-3-carboxamide 1,1-dioxide dimethyl sulfoxide solvate

Abstract

The title compound, C16H13N3O5S·C2H6OS, is of interest as a precursor to biologically active (benzothiazin-3-yl)quinazolinones and its structure is reported here as the dimethyl sulfoxide (DMSO) solvate. The structure displays intramolecular N—H...O and O—H...O hydrogen bonding, giving rise to six-membered hydrogen-bonded rings, with head-to-tail intermolecular pairs of N—H...O hydrogen bonds linking pairs of neighbouring molecules and two independent N—H...O=S intermolecular hydrogen bonds to the DMSO molecule resulting in the pairs of molecules being linked into stepped chains parallel to a.