Synthesis of 1,3-thiazine-2,4-diones with potential anticancer activity.

Abstract 2-Amino-1,3-thiazin-4-ones were subjected to acetylation followed by mild acid hydrolysis to give compounds containing the 1,3-thiazine-2,4-dione core. The potential of these S , N -containing heterocycles as antitumor agents against human cancer cell lines, among other types, was evaluated. The results show that phenyl- and naphthyl-substituted thiazinediones presented selective antitumoral activity against leukemia cells. These compounds caused cell death with DNA fragmentation and the mechanism of action seems to involve caspase cascade activation, imbalance in intracellular Ca 2+ and mitochondrial metabolism, and/or endoplasmic reticulum stress.