Vijeta Arjun, Casadevall Carla, Roy Souvik, Reisner Erwin
Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.
Current address: School of Chemistry, University of Lincoln, Joseph Banks Laboratories, Lincoln, LN6 7DL, UK.
Angew Chem Int Ed Engl. 2021 Apr 6;60(15):8494-8499. doi: 10.1002/anie.202016511. Epub 2021 Mar 3.
Ni-deposited mesoporous graphitic carbon nitride (Ni-mpg-CN ) is introduced as an inexpensive, robust, easily synthesizable and recyclable material that functions as an integrated dual photocatalytic system. This material overcomes the need of expensive photosensitizers, organic ligands and additives as well as limitations of catalyst deactivation in the existing photo/Ni dual catalytic cross-coupling reactions. The dual catalytic Ni-mpg-CN is demonstrated for C-O coupling between aryl halides and aliphatic alcohols under mild condition. The reaction affords the ether product in good-to-excellent yields (60-92 %) with broad substrate scope, including heteroaryl and aryl halides bearing electron-withdrawing, -donating and neutral groups. The heterogeneous Ni-mpg-CN can be easily recovered from the reaction mixture and reused over multiple cycles without loss of activity. The findings highlight exciting opportunities for dual catalysis promoted by a fully heterogeneous system.
负载镍的介孔石墨相氮化碳（Ni-mpg-CN）作为一种廉价、坚固、易于合成且可回收的材料被引入，它可作为一种集成的双光催化体系发挥作用。这种材料克服了现有光催化/Ni双催化交叉偶联反应中对昂贵光敏剂、有机配体和添加剂的需求以及催化剂失活的局限性。负载镍的介孔石墨相氮化碳双催化剂在温和条件下实现了芳基卤化物与脂肪醇之间的碳-氧偶联反应。该反应能以良好到优异的产率（60-92%）得到醚产物，底物范围广泛，包括带有吸电子、供电子和中性基团的杂芳基卤化物和芳基卤化物。负载镍的介孔石墨相氮化碳这种多相催化剂可很容易地从反应混合物中回收，并能在多个循环中重复使用而不损失活性。这些发现凸显了由完全多相体系促进的双催化所带来的令人兴奋的机遇。
