1-(4-Chloro-phen-yl)-2-[4-hy-droxy-3-(3-meth-oxy-benzo-yl)-1,1-dioxo-2H-1λ(6),2-benzothia-zin-2-yl]ethanone.

In the title mol-ecule, C(24)H(18)ClNO(6)S, the heterocyclic thia-zine 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 meth-oxy-benzoyl and the chloro-phenyl rings lie roughly parallel to each other, with a dihedral angle between the mean planes of these rings of 8.86 (10)°. The mol-ecular structure is consolidated by intra-molecular O-H⋯O and C-H⋯O inter-actions and the crystal packing is stabilized by inter-molecular O-H⋯O and C-H⋯Cl hydrogen bonds.

Synthesis, spectroscopic and cytotoxic studies of biologically active new schiff bases derived from p-nitrobenzaldehyde.

Thirteen new Schiff bases derived from p-nitrobenzaldehyde were synthesized by condensation with the appropriate amines. An unusual reduction of the p-nitrobenzaldehyde to the corresponding alcohol was also observed in one of the reactions. The structures of the compounds were identified using spectroscopic techniques. Cytotoxicity for the titled compounds was studied against Brine Shrimp, used as the test animal.