- Baeyer-Villiger oxidation of cyclic ketones with aqueous hydrogen peroxide catalyzed by transition metal oxides
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The Baeyer-Villiger oxidation of cyclic ketones to the corresponding lactones using aqueous hydrogen peroxide as an oxidant over transition metal oxides was investigated. MoO3 and WO3 were found to exhibit higher catalytic activity than TiO2, Fe2O 3, Co3O4, ZnO and ZrO2. The high catalytic activity was attributed to the interaction of MoO3/H 2O2 and WO3/H2O2. Additionally, the reaction mechanism on MoO3 and WO3 was proposed.
- Ma, Qingguo,Xing, Wanzhen,Xu, Junhui,Peng, Xinhua
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- METHOD FOR MANUFACTURING ESTER
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The present invention relates to a method for manufacturing an ester from a ketone or an aldehyde, which is a reactive substrate, by a Baeyer-Villiger oxidation reaction using hydrogen peroxide, and in this method, as a catalyst, M(BAr4)n, which is a metal borate, is used (M represents an alkali metal or an alkaline earth metal; Ar represents an aryl; and n is the same number as the valence of M). For example, when cyclohexanone was used as the reactive substrate, and Sr[B(3,5-CF3C6H3)4]2 was used as the catalyst, ε-caprolactone was obtained at an isolated yield of 82%.
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Paragraph 0070; 0074; 0086; 0087
(2013/08/28)
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