2-(3,4-Dimethyl-5,5-dioxo-2H,4H-pyrazolo[4,3-c][1,2]benzothiazin-2-yl)-N-(2-fluorobenzyl)acetamide

Abstract

In the title mol­ecule, C20H19FN4O3S, the heterocyclic thia­zine ring adopts a half-chair conformation with the S atom displaced by 0.668 (4) Å from the mean plane formed by the remaining ring atoms. The mean planes of the benzene and pyrazole rings are inclined with respect to each other at a dihedral angle of 17.4 (3)°. The acetamide chain (O/N/C/C/C) linking the pyrazole and 2-fluoro­benzyl rings is essentially planar (r.m.s. deviation = 0.030 Å) and forms dihedral angles with the mean planes of these rings of 78.8 (2) and 78.89 (14)°, respectively. The crystal structure is stabilized by N—H⋯O and C—H⋯O hydrogen-bonding inter­actions, resulting in a six-membered ring with an R 2 1(6) motif, while C—H⋯O and C—H⋯F hydrogen-bonding inter­actions result in chains of mol­ecules lying along the c axis in a zigzag fashion.