caa a22 4500 445870397 CHVBK 20180317145509.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10563-010-9104-6 doi (NATIONALLICENCE)springer-10.1007/s10563-010-9104-6 Development of Ceria-Supported Ruthenium Catalysts Effective for Various Synthetic Reactions [Elektronische Daten] [Kenji Wada, Saburo Hosokawa, Masashi Inoue] Our recent results on organic transformations such as C-C bond formation via the activation of stable C-C or C-H bonds and aerobic oxidation of alcohols catalyzed by CeO2-supported ruthenium are reviewed. A simple, recyclable heterogeneous Ru/CeO2 catalyst showed excellent activity for sequential transfer-allylation/isomerization of homoallyl alcohols with aldehydes to saturated ketones via the C-C bond activation. While homogeneous ruthenium and rhodium complex catalysts require additives and/or pressurized CO, the reaction with Ru/CeO2 smoothly proceeded in the absence of any additives. The Ru/CeO2 catalyst also showed excellent activity for the addition of sp2 C-H bonds of aromatic ketones to vinylsilanes. The Ru/CeO2 catalyst realized the chelation-assisted arylation of stable aromatic C-H bonds with aryl chlorides. The activity of the catalyst was greatly improved by the PPh3-modification under hydrogen atmosphere prior to the reactions. The catalyst acts heterogeneously without a significant leaching of ruthenium species, indicating that the Ru/CeO2 catalyst has an advantage over homogeneous catalysts from practical and environmental points of view. The effects of chemical and physical properties of CeO2 on the activity of CeO2-supported noble metal catalysts were examined. Porous CeO2 powders were prepared by the coagulation of solvothermally synthesized colloidal ceria nanoparticles, and the thus-prepared CeO2 powders showed an oxygen migration ability far superior to the CeO2 samples prepared by the usual precipitation method. The ruthenium catalysts supported on the former CeO2 powders showed a high activity for the aerobic oxidation of benzyl alcohol. The effects of the pore structure of CeO2 powders on the activity of the Ru/CeO2 catalysts are also discussed. Springer Science+Business Media, LLC, 2010 Ruthenium nationallicence Ceria nationallicence Heterogeneous catalysis nationallicence C-H bond activation nationallicence C-C bond formation nationallicence Aerobic oxidation nationallicence Benzyl alcohol nationallicence Wada Kenji Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, 615-8510, Kyoto, Japan aut Hosokawa Saburo Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, 615-8510, Kyoto, Japan aut Inoue Masashi Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, 615-8510, Kyoto, Japan aut Catalysis Surveys from Asia Springer US; http://www.springer-ny.com 15/1(2011-03-01), 1-11 1571-1013 15:1<1 2011 15 10563 https://doi.org/10.1007/s10563-010-9104-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10563-010-9104-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wada Kenji Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, 615-8510, Kyoto, Japan aut NATIONALLICENCE 700 1- Hosokawa Saburo Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, 615-8510, Kyoto, Japan aut NATIONALLICENCE 700 1- Inoue Masashi Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, 615-8510, Kyoto, Japan aut NATIONALLICENCE 773 0- Catalysis Surveys from Asia Springer US; http://www.springer-ny.com 15/1(2011-03-01), 1-11 1571-1013 15:1<1 2011 15 10563 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer