Joanne V. Allen, Sophie Bergeron, Matthew J. Griffiths, Shubhasish Mukherjee, Stanley M. Roberts, Natalie M. Williamson and L. Eduardo Wu
The asymmetric oxidation of some enones (Table 1), selected dienones 3–5, and a trienone 13 is accomplished using poly-L-leucine or poly-D-leucine and urea hydrogen peroxide under non-aqueous conditions. One of the resultant epoxy ketones 6 has been converted into the δ-lactones 19 and 22.