Ammonium salt catalyzed oxidation of organosulfides to organosulfoxydes

The selective oxidation of aromatic and aliphatic organosulfides with H2O2/H2O catalyzed by metal free ammonium salts has been explored. Reactions were performed using 2.5–5 mol % of catalyst loadings, isolating the corresponding sulfoxides in good to excellent yields (75–93%) and high selectivity.