Abstract

The RuCl 3 catalysed epoxidation of olefins gave more than 10% of epoxide. Pyridine addition increased the yield and selectivity of the epoxide. Epoxidation of norbornene gave exo- and endo-epoxide. The effect of surfactants supports the involvement of carbocation intermediates. The epoxidation of cyclic olefins follows the reactivity order cyclo-octene > norbornene > cyclopentene > cycloheptene > cyclohexene. Spectral studies suggest that oxo ruthenium (V) is the active oxidizing species.

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