Polyfluorinated Quaternary Ammonium Salts of Polyoxometalate Anions:  Fluorous Biphasic Oxidation Catalysis with and without Fluorous Solvents

Autor: Maayan, G., Fish, R. H., Neumann, R.
Zdroj: Organic Letters; October 2003, Vol. 5 Issue: 20 p3547-3550, 4p
Abstrakt: Polyfluorinated quaternary ammonium cations, [CF3(CF2)7(CH2)3]3CH3N+ (RFN+), were synthesized and used as countercations for the [WZnM2(H2O)2(ZnW9O34)2]12- (M = Mn(II), Zn(II)) polyoxometalate. The (RFN+)12[WZnM2(H2O)2(ZnW9O34)2] compounds were fluorous biphasic catalysts for alcohol and alkenol oxidation, and alkene epoxidation with aqueous hydrogen peroxide. Reaction protocols with or without a fluorous solvent were tested. The catalytic activity and selectivity was affected by both the hydrophobicity of the solvent and the substrate.
Databáze: Supplemental Index