VおよびVI族金属酸化物を触媒とするヒドロペルオキシドによるオレフィンのエポキシ化反応 : ヒドロペルオキシドによるオレフィンのエポキシ化反応 (第1報)

概要

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Catalytic effects of several metal oxides of periodic groups V and VI on the hydroperoxide-epoxidation of olefins have been studied. It has been shown that molybdenum (VI) oxide is most selective for the epoxidation of octenes when cumene hydroperoxide or tert-butyl hydroperoxide is used. Tungsten (VI), on the other hand, showed only a poor selectivity, and the oxides of vanadium, niobium, selenium, and chromium, etc. were almost without effect. Results of the kinetic studies on the MoO3-catalyzed epoxidation of 1-octene and cyclohexene with hydroperoxides indicated that the reaction rate was proportional to the concentrations of olefin and of hydroperoxide. The effect of the amount of the catalyst was rather complex. It was suggested that the epoxidation proceeds via preliminary formation of complexes between the hydroperoxide and the catalyst. The structure of the intermediate complex and the solvation of hydroperoxide have been discussed. This epoxidation method was also applied to various olef ins.