Selective Oxidation of Cyclohexene with H2O2 Catalyzed by Resin Supported Peroxo Phosphotungstic Acid Under Mild Conditions

• DOI: 10.1007/s10562-020-03273-1
• Publication Date: 2020-06-10T08:02:34Z
• Authors: Jia Liu; Guoqiang Yang; Ying Liu; Zheng Zhou; Zhibing Zhang; Xingbang Hu
• Keywords: Phosphotungstic acid; Ion-exchange resin; Polystyrene

A series of modified chloromethyl polystyrene resins loaded with peroxo phosphotungstic acid catalysts were synthesized for the selective oxidation of cyclohexene. The surface of resin was enriched with high concentration quaternary ammonium salt, and grafted with a large amount of peroxo PW-anion through ion exchange. The novel resin catalyst showed excellent cyclohexene conversion and epoxide selectivity using 30% H2O2 as oxidant at ambient temperature. Furthermore, the resin catalyst exhibited excellent recycling stability, which can be reused by a simple filtration and the peroxo phosphotungstic acid did not leach into the solvent after reaction.