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

Kato CN; Unno W; Kato S; Ogasawara T; Kashiwagi T; Uno H; Suzuki K; Mizuno N

Catalysis Letters, Vol.146, No.10, 2119-2128, 2016

DOI10.1007/s10562-016-1813-7 Export Citation

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

Kato CN, Unno W, Kato S, Ogasawara T, Kashiwagi T, Uno H, Suzuki K, Mizuno N

The organozirconium complex with alpha-Keggin-type mono-aluminum-substituted silicotungstate, [(n-C4H9)(4)N](6)[alpha-SiW11Al(OH)(2)O38ZrCp2](2)center dot 2H(2)O (TBA-Si-Al-Zr) was synthesized by the reaction of Cp2Zr(OTf)(2)center dot THF (or Cp2ZrCl2) with [(n-C4H9)(4)N](4)K0.5H0.5[alpha-SiW11{Al(OH2)}O-39]center dot 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. [GRAPHICS] .

Keywords:Organozirconium complex;Polyoxometalate;X-ray crystal structure;Meerwein-Ponndorf-Verley reduction;Heterogeneous catalyst