Paul A. Bentley, Sophie Bergeron, Michael W. Cappi, David E. Hibbs, Michael B. Hursthouse, Thomas C. Nugent, Rosalino Pulido, Stanley M. Roberts and L. Eduardo Wu
Urea–hydrogen peroxide complex in an organic solvent and in the presence of DBU and poly-(L)-leucine causes rapid asymmetric epoxidation of the enones 1a, b and d.