Solvent-free Baeyer–Villiger oxidation with H2O2 as oxidant catalyzed by multi-SO3H functionalized heteropolyanion-based ionic hybrids

• Three multi-SO3H functionalized heteropolyanion-based hybrids were prepared.
• Three hybrids show high catalytic activities in BV oxidation with H2O2 as oxidant.
• Hybrids can be recovered readily and reused ten times without loss in activities.

Three novel multi-SO3H functionalized heteropolyanion-based ionic hybrids were synthesized and characterized, which as heterogeneous catalysts for Baeyer–Villiger oxidation using 35% aqueous H2O2 as oxidant show high catalytic activity under solvent-free conditions, the target lactones were obtained with yields of 69% to 88% in 3 h at 50 °C. Three ionic hybrids could be recovered readily and their catalytic activity almost completely retained after ten recycles.

Three novel multi-SO3H functionalized heteropolyanion-based ionic hybrids were synthesized and characterized. They as recyclable catalysts for Baeyer–Villiger oxidation using 35% aqueous hydrogen peroxide as oxidant exhibited high catalytic activity under solvent-free conditions.Figure optionsDownload as PowerPoint slide