A. Armstrong et al., KETONE-DIRECTED PERACID EPOXIDATION OF CYCLIC ALKENES, Journal of the Chemical Society. Perkin transactions. I, (12), 1996, pp. 1373-1380
Ketone carbonyl groups are shown to direct the peracid epoxidation of
cyclic alkenes with greater selectivity than that displayed by esters.
An O-18 labelling study is used to show that a dioxirane intermediate
is not involved in these reactions.