3-[4-(3,4-Dimethyl-5,5-dioxo-2H,4H-pyrazolo­[4,3-c][1,2]benzothia­zin-2-yl)phen­yl]-2-hy­droxy-1-mesitylprop-2-en-1-one hexane hemisolvate

In the title compound, C₂₉H₂₇N₃O₄S·0.5C₆H₁₄, the heterocyclic thia­zine ring adopts a half-chair conformation with the S and N atoms displaced by 0.500 (5) and 0.229 (5) Å, respectively, on opposite sides from the mean plane formed by the remaining ring atoms. The mean planes of the pyrazole ring and the benzene ring bonded to it form a dihedral angle of 35.76 (11)° and an intra­molecular O—H...O hydrogen bond ocurs. The crystal structure features O—H...O and C—H...O hydrogen bonds. There is a half-mol­ecule of hexane in the asymmetric unit lying about an inversion center. It is disordered over two sets of sites with occupancy factors 0.590 (9) and 0.410 (9).

3-[Hy­droxy(3-meth­oxy­phen­yl)methyl­idene]-2-(2-oxo-2-phenyl­eth­yl)-3,4-dihydro-2H-1λ⁶,2-benzothia­zine-1,1,4-trione

In the title mol­ecule, C₂₄H₁₉NO₆S, the heterocyclic thia­zine ring adopts a half-chair conformation with the S and N atoms displaced by 0.180 (5) and 0.497 (5) Å, respectively, on opposite sides of the mean plane formed by the remaining ring atoms. The benzene rings of the benzothia­zine unit and the meth­oxy­phenyl group are almost coplanar, with the dihedral angle between the mean planes of these rings being 5.9 (2)°, while the benzene ring of the 2-oxo-2-phenyl­ethyl group is inclined at 79.68 (11) and 81.01 (10)°, respectively, to these rings. The mol­ecular structure is consolidated by intra­molecular O—H...O and C—H...N inter­actions, and the crystal packing is stabilized by weak C—H...O hydrogen bonds.

2-[2-(3-Chloro­phen­yl)-2-oxoeth­yl]-4-hy­droxy-3-(3-meth­oxy­benzo­yl)-2H-1λ⁶,2-benzothia­zine-1,1-dione

In the title mol­ecule, C₂₄H₁₈ClNO₆S, the heterocyclic thia­zine ring adopts a half chair conformation with the S and N atoms displaced by 0.318 (3) and 0.387 (3) Å, respectively, on the opposite sides from the mean plane formed by the remaining ring atoms. The benzene rings of the benzothia­zin unit and meth­oxy­benzoyl group are more or less coplanar, the dihedral angle between the mean planes of these rings being 12.37 (10)° while the chloro­phenyl ring is inclined at 81.87 (4) and 73.30 (5)°, respectively, to these rings. The mol­ecular structure is consolidated by intra­molecular O—H...O and C—H...N inter­actions and the crystal packing is stabilized by weak inter­molecular C—H...O hydrogen bonds.

1-(4-Chloro­phen­yl)-2-[4-hy­droxy-3-(3-meth­oxy­benzo­yl)-1,1-dioxo-2H-1λ⁶,2-benzothia­zin-2-yl]ethanone

In the title mol­ecule, C₂₄H₁₈ClNO₆S, the heterocyclic thia­zine ring adopts a half-chair conformation with the S and N atoms displaced by 0.406 (5) and 0.444 (5) Å, respectively, on opposite sides of the mean plane formed by the remaining ring atoms. The meth­oxy­benzoyl and the chloro­phenyl rings lie roughly parallel to each other, with a dihedral angle between the mean planes of these rings of 8.86 (10)°. The mol­ecular structure is consolidated by intra­molecular O—H...O and C—H...O inter­actions and the crystal packing is stabilized by inter­molecular O—H...O and C—H...Cl hydrogen bonds.