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The Role of Copper in the Upgrading of Bioalcohols
ChemCatChem ( IF 3.8 ) Pub Date : 2018-03-08 , DOI: 10.1002/cctc.201701844 Federica Zaccheria 1 , Nicola Scotti 1 , Nicoletta Ravasio 1
ChemCatChem ( IF 3.8 ) Pub Date : 2018-03-08 , DOI: 10.1002/cctc.201701844 Federica Zaccheria 1 , Nicola Scotti 1 , Nicoletta Ravasio 1
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Some recent results on Guerbet reactions are reported and a short review on dehydrogenative coupling of alcohols (DHC) is presented. The focus of this Minireview is on the role of acidic and basic sites and, in particular, on the role of Cu if it is present in the catalyst, taking into account that the two processes share the first step, namely alcohol dehydrogenation, whereas the second one is determining in driving selectivity towards self‐coupling or symmetrical ester formation. The main type of catalysts for the Guerbet reaction are based on hydrotalcites, hydroxyapatite and supported metal systems, whereas the catalysts for DHC are copper catalysts on different supports. The role of acidic and basic sites in determining activity and selectivity to Guerbet alcohols has been investigated and quite stringent requirements for the selectivity of the reaction have been highlighted. For DHC, we have focused on the role of the interaction of copper with the support, which in turn influences the distribution of acidic and basic sites. The morphology of the metallic phase has been suggested as a distinctive factor in promoting C−C coupling or C−O coupling in the second step for Cu‐containing catalysts.
中文翻译：
铜在生物醇升级中的作用
报告了一些有关Guerbet反应的最新结果，并简要概述了醇的脱氢偶联（DHC）。这次Minireview的重点是酸性和碱性位点的作用，尤其是如果铜存在于催化剂中，则要考虑铜的作用，要考虑到这两个过程共有第一步，即醇脱氢，而第二个是确定驱动自偶联或对称酯形成的选择性。Guerbet反应的主要催化剂类型是基于水滑石，羟基磷灰石和负载型金属体系，而DHC的催化剂是在不同载体上的铜催化剂。已经研究了酸性和碱性位点在确定对Guerbet醇的活性和选择性方面的作用，并且突出了对反应选择性的严格要求。对于DHC，我们已将注意力集中在铜与载体的相互作用上，而铜又会影响酸性和碱性位点的分布。金属相的形态已被认为是促进含铜催化剂第二步中C-C偶联或C-O偶联的独特因素。
更新日期：2018-03-08
中文翻译：
铜在生物醇升级中的作用
报告了一些有关Guerbet反应的最新结果，并简要概述了醇的脱氢偶联（DHC）。这次Minireview的重点是酸性和碱性位点的作用，尤其是如果铜存在于催化剂中，则要考虑铜的作用，要考虑到这两个过程共有第一步，即醇脱氢，而第二个是确定驱动自偶联或对称酯形成的选择性。Guerbet反应的主要催化剂类型是基于水滑石，羟基磷灰石和负载型金属体系，而DHC的催化剂是在不同载体上的铜催化剂。已经研究了酸性和碱性位点在确定对Guerbet醇的活性和选择性方面的作用，并且突出了对反应选择性的严格要求。对于DHC，我们已将注意力集中在铜与载体的相互作用上，而铜又会影响酸性和碱性位点的分布。金属相的形态已被认为是促进含铜催化剂第二步中C-C偶联或C-O偶联的独特因素。
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