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Oxidation of alcohols with tert-butylhydroperoxide catalyzed by Mn (II) complexes immobilized in the pore channels of mesoporous hexagonal molecular sieves (HMS)

机译:固定在介孔六角形分子筛(HMS)孔道中的Mn(II)配合物催化的叔丁基过氧化氢氧化醇

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摘要

The oxidation of alcohols with tert-butylhydroperoxide (TBHP), in the presence of Mn~(2+) complexes immobilized in the pore channels of mesoporous hexagonal molecular sieves (HMS), were investigated. It was found that immobilized [Mn(bpy)2]~(2+)/HMS is an efficient catalyst for the oxidation of alcohols such as benzyl alcohol, n-hexanol and cyclohexanol. The effects of reaction time, amount of Mn~(2+) in the catalyst, type of substrates and oxidants in this catalysis system were investigated. At optimum conditions, TBHP is more efficient oxidant with respect to H2O2. Following order has been observed for the percentage of conversions of alcohols: benzylic >1° >2°.
机译:研究了在固定在介孔六角形分子筛(HMS)孔道中的Mn〜(2+)配合物存在下,叔丁基过氧化氢(TBHP)对醇的氧化作用。发现固定化的[Mn(bpy)2]〜(2 +)/ HMS是氧化诸如苄醇,正己醇和环己醇的醇的有效催化剂。研究了反应时间,催化剂中Mn〜(2+)的量,底物类型和氧化剂的影响。在最佳条件下,TBHP相对于H2O2是更有效的氧化剂。对于醇的转化百分比,观察到以下顺序:苄基> 1°> 2°。

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