水溶性膦酸双核金属钌催化t-BuOOH氧化醇性能 |
tert-Butyl Hydroperoxide Oxygenation of Alcohol Catalyzed by Diruthenium Diphosphonate in Aqueous Solution |
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摘要: 双核金属钌膦酸配合物(NH4)3[Ru2(hedp)2]·2H2O(hedp=羟基亚乙基二膦酸)在常温水溶性体系中,无需相转移催化剂,可以高效催化t-BuOOH氧化各种醇类,包括一级醇、二级醇和长链醇。催化机理研究表明,双核金属钌膦酸配合物的[RuⅢ-RuⅡ]3-单元与t-BuOOH作用,可以形成含过氧键的RuⅢ-RuⅢ-OOtBu过渡态,然后再对底物醇进行氧化。该机理得到实验印证,如发现酸抑制而碱催进该反应,紫外可见光谱表明RuⅢ-RuⅢ-OOtBu的形成。 |
关键词: 双核钌 金属-金属键 醇氧化 水溶性体系 |
基金项目: 国家自然科学基金(No.21571190)资助项目。 |
Abstract: (NH4)3[Ru2(hedp)2]·2H2O (hedp=1-hydroxyethylidenediphosphonate) with t-BuOOH as oxidant is proved to be highly effective in the catalytic oxidation of alcohol, such as secondary alcohol and long-chain aliphatic alcohol, in aqueous solution at room temperature. The phase-transfer catalyst is not necessary. The acid or the coordinated base inhibits ketone production, while the base improves the reaction selectivity and the yield. The mechanism is proposed as a peroxometal pathway. The UV-Vis spectra prove that the key intermediates Ru2-OOtBu is formed. |
Keywords: dinuclear ruthenium metal-metal bond alcohol oxidation aqueous solution |
投稿时间:2017-10-02 修订日期:2018-01-24 |
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廖海深,李辰,易小艺.水溶性膦酸双核金属钌催化t-BuOOH氧化醇性能[J].无机化学学报,2018,34(5):883-888. |
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