A new electrophilic difluoromethylation reagent prepared from TMSCF2SO2Ph, which can efficiently transfer the PhSO2CF2 moiety to nucleophiles such as thiols under mild reaction conditions. Copper(II)-catalyzed decarboxylative difluoro(phenylsulfonyl)methylation of α,β- or β,γ-unsaturated carboxylic acids with this reagent can afford vinylic and allylic difluoromethylation products.
Electrophilic (phenylsulfonyl)difluoromethylation of thiols with a hypervalent iodine(III)-CF2SO2Ph reagent.
Copper-catalyzed Di- and trifluoromethylation of α,β-unsaturated carboxylic acids: A protocol for vinylic fluoroalkylations. 
Copper-catalyzed difluoromethylation of β,γ-unsaturated carboxylic acids: An efficient allylic difluoromethylation.