Photocatalytic Sulfonyl Peroxidation of Alkenes via Deamination of N-Sulfonyl Ketimines

A photocatalytic three-component sulfonyl peroxidation of alkenes with N-sulfonyl ketimines and tert-butyl hydroperoxide is reported. The reaction takes place via the photoinduced EnT process, which allows the efficient synthesis of a variety of beta-peroxyl sulfones under mild reaction conditions in the absence of a transition metal catalyst. The downstream derivatizations of the peroxides were also performed. Furthermore, the utility of this protocol was manifested by the synthesis of 11 beta-HSD1 inhibitor and the antiprostate cancer drug bicalutamide.