Zuschrift
Zinc(II) Containing γ-Keggin Sandwich-Type Silicotungstate: Synthesis in Organic Media and Oxidation Catalysis†
Yuji Kikukawa,
Kazuya Yamaguchi Dr.,
Noritaka Mizuno Prof. Dr.,
Yuji Kikukawa
Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan), Fax: (+81) 3-5841-7220
Search for more papers by this authorKazuya Yamaguchi Dr.
Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan), Fax: (+81) 3-5841-7220
Search for more papers by this authorNoritaka Mizuno Prof. Dr.
Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan), Fax: (+81) 3-5841-7220
Search for more papers by this authorYuji Kikukawa,
Kazuya Yamaguchi Dr.,
Noritaka Mizuno Prof. Dr.,
Yuji Kikukawa
Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan), Fax: (+81) 3-5841-7220
Search for more papers by this authorKazuya Yamaguchi Dr.
Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan), Fax: (+81) 3-5841-7220
Search for more papers by this authorNoritaka Mizuno Prof. Dr.
Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan), Fax: (+81) 3-5841-7220
Search for more papers by this author†
We thank Drs. K. Uehara and S. Uchida (The University of Tokyo) for their help with experiments. This work was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Science, Sports and Technology of Japan. Y.K. is grateful for a JSPS Research Fellowship for Young Scientists.
Graphical Abstract
Zink macht den Unterschied: Das Polyoxometallat 1 reagiert mit Zn2+-Ionen in Aceton nahezu quantitativ zum neuartigen Sandwich-artigen POM 2. Die Oxidation sekundärer Alkohole mit H2O2 verläuft mit 2 effizient, und zwar mit Aktivitäten und Chemoselektivitäten, die sich von denen wolframhaltiger Katalysatoren einschließlich 1 erheblich unterscheiden (siehe Schema; grün Zn).
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- 18The TBA-Zn4-catalyzed oxidation of benzyl alcohol under the conditions described in Table 2 gave benzaldehyde and benzoic acid in 87 % and 3 % yields (for 2.5 h), respectively.
- 19Acetone was not a special solvent; for example, the oxidation of 1 a in acetonitrile gave 1 b in>99 % yield under the same conditions.
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