title: Versatile Oxidation Methods for Organic and Inorganic Substrates Catalyzed by Platinum-Group Metals on Carbons.
abstract: Platinum-group metals on activated carbon catalysts, represented by Pd/C, Ru/C, Rh/C, etc., are widely utilized to accomplish green and sustainable organic reactions due to their favorable features, such as easy handling, recoverability, and reusability. The efficient oxidation methods of various organic compounds using heterogeneous platinum-group metals on carbons with or without added oxidants are summarized in this Personal Account. The oxidation of internal alkynes into diketones was effectively catalyzed by Pd/C in the presence of dimethyl sulfoxide and molecular oxygen or pyridine N-oxide. The Pd/C-catalyzed mild combustion of gaseous hydrogen with molecular oxygen provided hydrogen peroxide, which could be directly utilized for the oxidation of sulfide derivatives into sulfoxides. Furthermore, the Ru/C-catalyzed aerobic oxidation of primary and secondary alcohols gave the corresponding aldehydes and ketones, respectively. On the other hand, the dehydrogenative oxidation of secondary alcohols into ketones was achieved using Rh/C in water, and primary alcohols were effectively dehydrogenated by Pd/C in water under mildly reduced pressure to produce carboxylic acids.
authors.affiliation: Gifu Pharmaceutical University Laboratory of Organic Chemistry, 1-25-4 Daigakunishi, Gifu 501-1196, Japan.
authors.forename: Yoshinari
authors.initials: Y
authors.lastname: Sawama
authors.affiliation: Gifu Pharmaceutical University Laboratory of Organic Chemistry, 1-25-4 Daigakunishi, Gifu 501-1196, Japan.
authors.forename: Shota
authors.initials: S
authors.lastname: Asai
authors.affiliation: Gifu Pharmaceutical University Laboratory of Organic Chemistry, 1-25-4 Daigakunishi, Gifu 501-1196, Japan.
authors.forename: Yasunari
authors.initials: Y
authors.lastname: Monguchi
authors.affiliation: Gifu Pharmaceutical University Laboratory of Organic Chemistry, 1-25-4 Daigakunishi, Gifu 501-1196, Japan.
authors.forename: Hironao
authors.initials: H
authors.lastname: Sajiki
keywords: heterogeneous catalysis; oxidation; platinum; supported catalysts; transition metals