Polyoxometalates exhibit interesting properties as catalysts. They present a particular robustness, and they are tuneable in terms of structure and composition. Hybrid polyoxotungstates, soluble in alternative media with outstanding properties as ionic liquids and fluorinated solvents, may provide novel oxidation catalytic systems: a)Recyclable catalytic phases have been obtained with polyoxotungstates dissolved in ionic liquids, to perform the epoxidation of olefins under microwave assisted conditions, showing high conversion (99% in 1 min, for cyclooctene) with low irradiation power (<10 W).1b)       fluorophilic derivatives of polyoxotungstates have been obtained by using fluorous-tagged cations2 and organic ligands. Epoxidation of olefins by H2O2 has thus been achieved in perfluorinated alcohols (99% yield in 25' at 70�C).1. S. Berardi, M. Bonchio, M. Carraro, V. Conte, A. Sartorel, G. Scorrano. J. Org. Chem.; 2007; 72; 8954.2.       M.Carraro, M. Gardan, G. Scorrano,  E. Drioli, E. Fontananova , M. Bonchio, Chem. Commun., 2006, 4533.

Oxidation of olefins with hydrogen peroxide and polyoxometalates in ionic liquids and fluorinated alcohols as “magic solvents”

240th National Meeting (2010)

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