Solvent free oxidation of sulfides to sulfones by H2O2 in the presence of chromium substituted polyoxometalate as catalyst

• The use of TBA salts of [PW11CrO39]4 − as a catalyst
• Solvent free oxidation of various aromatic and aliphatic sulfides
• Catalytic oxidation by hydrogen peroxide
• Oxidation of sulfide to sulfone by (TBA)4[PW11CrO39]·3H2O
• High to excellent yields and selectivity for giving sulfones

Solvent-free oxidation of sulfides into sulfones by 30% hydrogen peroxide has been achieved using chromium substituted Keggin type polyoxometalate under mild reaction conditions in 94–100% yield. This catalytic system showed excellent activity in the oxidation of sulfide groups. The other active functional groups such as hydroxyl and CC bond have been tolerated.

Chromium substituted Keggin type polyoxometalate (TBA)4[PW11CrO39]·3H2O catalyzed oxidation of various sulfides into the corresponding sulfones by hydrogen peroxide in excellent yields. Chemoselectivity, room temperature reactions and solvent free conditions are the other advantages for this catalytic system.Figure optionsDownload as PowerPoint slide