We
report here an efficient and highly straightforward access to
α-difluoromethylated ketones through a visible light-mediated
difluoromethylation of readily available enol silanes. The method,
which takes advantage of the polyvalence of Hu’s reagent, N-tosyl-S-difluoromethyl-S-phenylsulfoximine, used here as a CHF2 radical precursor
under catalytic photoredox conditions, is practical, scalable, and
provides the corresponding α-CHF2 ketones in good
to excellent yields.
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