[{W(O)(O_2)_2(H_2O)}_2(μ-O)]~(2-)-Catalyzed Epoxidation of Allylic Alcohols in Water with High Selectivity and Utilization of Hydrogen Peroxide

摘要

A dinuclear peroxotungstate, K_2[{W(=O)(O_2)_2(H_2O)}_2(μ-O)]_2 H_2O·2H_2O, exhibits high catalytic performance for the epoxidation of various allylic alcohols with only one equivalent of hydrogen peroxide at 305 K in water solvent. The effectiveness of this system is evidenced by high chemo-, regio-, and diastereoselectivity, and stereospecificity for the epoxidation of allylic alcohols. Furthermore, products/catalyst separation can be easily carried out by simple extraction and the catalyst recovered can be reused with the maintenance of the catalytic performance.