The epoxidation of propene is performed in homogeneous phase using various molecular catalysts and H2O2 or tert-butyl hydroperoxide as oxidants. A comparison between some molybdenum catalysts and methyltrioxorhenium (MTO) shows that the well known Re catalyst is the best among the examined catalysts.
Markovits, I. I. E., Anthofer, M. H., Kolding, H., Cokoja, M., Pöthig, A., Raba, A., ... Kühn, F. E. (2014). Efficient epoxidation of propene using molecular catalysts. Catalysis Science & Technology, 4, 3845–3849. https://doi.org/10.1039/c4cy01066c