An operationally simple transition-metal-free protocol for the arylation of α-(trifluoromethyl)styrene derivatives with silicon-protected functionalized aryl pronucleophiles is disclosed. Catalytic amounts of an anionic Lewis base such as fluoride trigger the release of the aryl nucleophile from -aryl--silyldiazenes by desilylation along with denitrogenation. The thus-generated carbon nucleophiles engage in an allylic displacement with α-(trifluoromethyl)styrene electrophiles to afford the corresponding geminal difluoroalkenes.
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