Efficient Heterogeneous Epoxidation of Alkenes by a Supported Tungsten Oxide Catalyst

Oxidation optimization: A combination of tungsten and zinc oxides on a SnO2 support (W–Zn/SnO2) is a heterogeneous and reusable solid catalyst for selective oxidation with aqueous H2O2. With it, various substrates, such as alkenes, amines, silanes, and sulfides, were oxidized into the corresponding products in high yields (see scheme). The catalyst can be reused several times without an appreciable loss in catalytic performance.