Synthesis, characterization and structures of 2-(3,5-dimethylpyrazol-1-yl) ethylseleno derivatives and their probable glutathione peroxidase (GPx) like activity

A series of 2-(3,5-dimethylpyrazol-1-yl) ethylseleno derivatives has been synthesized. The glutathione peroxidase like catalytic activity of these compounds has been studied in a model system, in which reduction of hydrogen peroxide with dithiothreitol (DTTred), in the presence of an organoselenium compound was investigated by H-1 NMR spectroscopy. All these compounds exhibit GPx like catalytic activities and the catalytic reaction proceeds through a selenoxide intermediate, identified by Se-77{H-1} NMR spectroscopy.