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Commercial Gold(I) and Gold(III) Compounds Supported on Carbon Materials as Greener Catalysts for the Oxidation of Alkanes and Alcohols
ChemCatChem ( IF 3.8 ) Pub Date : 2018-03-05 , DOI: 10.1002/cctc.201701886 Sónia A. C. Carabineiro 1 , Luísa M. D. R. S. Martins 2 , Armando J. L. Pombeiro 2 , José L. Figueiredo 1
ChemCatChem ( IF 3.8 ) Pub Date : 2018-03-05 , DOI: 10.1002/cctc.201701886 Sónia A. C. Carabineiro 1 , Luísa M. D. R. S. Martins 2 , Armando J. L. Pombeiro 2 , José L. Figueiredo 1
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Strategies are presented for single‐pot efficient oxidative functionalization of cyclohexane and alcohols, under mild conditions, catalysed by Au(I) or Au(III) compounds supported on different carbon materials with three different surface treatments. The obtained materials were tested for the oxidation of cyclohexane under mild conditions (room temperature and atmospheric pressure), using an environmentally friendly oxidant (tert‐butyl hydroperoxide, TBHP, 70 % aqueous solution). All materials were very selective to the production of cyclohexanol and cyclohexanone with no trace of by‐products detected. The catalysts were also tested in the selective oxidation of methyl benzyl alcohol, cyclohexanol, and 2‐octanol with TBHP, under microwave irradiation, to the corresponding aldehydes or ketones. In general, better results are obtained for the heterogenised complexes and that the most efficient support is CNT‐ox‐Na. This is the first report on the oxidation of C−H bonds using the mononuclear gold complexes used; only the oxidation of unsaturated units had been reported previously. The sp3‐C−H activation is much more difficult than the oxidation of unsaturated molecules with molecular oxidants.
中文翻译：
碳材料上负载的市售金（I）和金（III）化合物，是用于氧化烷烃和醇的绿色催化剂
提出了在温和条件下，由负载在不同碳材料上的Au（I）或Au（III）化合物通过三种不同的表面处理催化的单锅高效氧化功能化环己烷和醇的策略。使用环境友好的氧化剂（叔胺）在温和的条件下（室温和大气压下）测试所得材料的环己烷氧化能力。叔丁基过氧化氢，TBHP，70％水溶液）。所有材料对环己醇和环己酮的生产都具有很高的选择性，没有发现痕量副产物。还测试了该催化剂在微波辐射下用TBHP将甲基苄醇，环己醇和2-辛醇选择性氧化为相应的醛或酮的能力。通常，杂化复合物可获得更好的结果，而最有效的支持是CNT-ox-Na。这是有关使用单核金配合物氧化CH键的第一份报告。以前仅报道了不饱和单元的氧化。sp 3 -C-H活化比用分子氧化剂氧化不饱和分子困难得多。
更新日期：2018-03-05
中文翻译：
碳材料上负载的市售金（I）和金（III）化合物，是用于氧化烷烃和醇的绿色催化剂
提出了在温和条件下，由负载在不同碳材料上的Au（I）或Au（III）化合物通过三种不同的表面处理催化的单锅高效氧化功能化环己烷和醇的策略。使用环境友好的氧化剂（叔胺）在温和的条件下（室温和大气压下）测试所得材料的环己烷氧化能力。叔丁基过氧化氢，TBHP，70％水溶液）。所有材料对环己醇和环己酮的生产都具有很高的选择性，没有发现痕量副产物。还测试了该催化剂在微波辐射下用TBHP将甲基苄醇，环己醇和2-辛醇选择性氧化为相应的醛或酮的能力。通常，杂化复合物可获得更好的结果，而最有效的支持是CNT-ox-Na。这是有关使用单核金配合物氧化CH键的第一份报告。以前仅报道了不饱和单元的氧化。sp 3 -C-H活化比用分子氧化剂氧化不饱和分子困难得多。
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