A novel compound based on catalytic functional metal rhenium, pyridinium perrhenate(PyHReO₄) was synthesized and characterized. The pyridinium perrhenate was used as catalyst in twotypes of reactions. One is the epoxidation of cyclooctene, the other is the Baeyer-Villiger oxidation of cyclicketones to lactones. The effects of catalyst, oxidant, solvent, reaction time and temperature were investigated,which confirmed the optimum reaction conditions of the catalyst system. Both types of catalytic reactionsexhibit high yields and high selectivity.

The synthesized novel compound based on catalytic functional metal rhenium, pyridinium perrhenate(PyHReO₄) exhibit excellent catalytic activity. The system with PyHReO₄ as a catalyst provided an effective, easy separation, mild and convenient method in two different types of reactions(One is the epoxidation of cyclooctene, the other is the Baeyer-Villiger oxidation of 2-adamantanone).