Homogeneous epoxidation methyltrioxorhenium

Methyltrioxorhenium, supported on silica functionalized with polyether tethers, catalyzed the epoxidation of alkenes with 30% aq H2O2 in high selectivity compared to the ring opening products observed in homogeneous media in the absence of an organic solvent.46... 

A. Goti, F. Cardona, G. Soldaini, C. Crestini, C. Fiani, R. Saladino, Methyltrioxorhenium-catalyzed epoxidation-methanolysis of glycals under homogeneous and heterogeneous conditions, Adv. Synth. Catal. 348,476 86 (2006). 

Methyltrioxorhenium (MTO) has perhaps been the most successful homogeneous catalyst for the epoxidation of simple olefins with hydrogen peroxide, however, attempts to modify the catalyst to achieve enantioselective epoxidation or anchoring to a solid support have met with only moderate success, probably because... 

A., et al. (2003). Selective Epoxidation of Monoterpenes with H2O2 and Polymer-Supported Methykheniumtrioxide Systems, Tetrahedron, 59, pp. 7403-7408 Saladino, R., Bernini, R., Neri, V., et al. (2009). A Novel and Efficient Catalytic Epoxidation of Monoterpenes by Homogeneous and Heterogeneous Methyltrioxorhenium in Ionic Liquids, Appl. Catal. A Gen., 360, pp. 171-176. 

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