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Organozirconium Complex with Keggin-Type Mono-Aluminum-Substituted Silicotungstate: Synthesis, Molecular Structure, and Catalytic Performance for Meerwein–Ponndorf–Verley Reduction

Research paper by Chika Nozaki Kato, Wataru Unno, Sakie Kato, Tsukasa Ogasawara, Toshifumi Kashiwagi, Hidemitsu Uno, Kosuke Suzuki, Noritaka Mizuno

Indexed on: 23 Jul '16Published on: 23 Jul '16Published in: Catalysis Letters



Abstract

The organozirconium complex with α-Keggin-type mono-aluminum-substituted silicotungstate, [(n-C4H9)4N]6[α-SiW11Al(OH)2O38ZrCp2]2·2H2O (TBA–Si–Al–Zr) was synthesized by the reaction of Cp2Zr(OTf)2·THF (or Cp2ZrCl2) with [(n-C4H9)4N]4K0.5H0.5[α-SiW11{Al(OH2)}O39]·H2O in acetonitrile. This compound showed high catalytic activities for Meerwein–Ponndorf–Verley reduction of ketones with 2-propanol in both homogeneous and heterogeneous system.

Graphical abstract 10.1007/s10562-016-1813-7.gif