Palladium-catalyzed cyanation and alkynylation of allylic <i>gem</i> -difluorides <i>via</i> Hiyama-type coupling

We report a palladium-catalyzed Hiyama-type defluorinative cross-coupling of allylic gem-difluorides with trimethylsilyl cyanide and silylalkynes <i>via</i> selective C-F bond activation. The reaction involves oxidative addition, Si-F-assisted transmetalation, and reductive elimination, enabling efficient construction of C(sp³)-CN and C(sp³)-C(sp) bonds under mild, additive-free conditions. It features broad substrate scope, excellent functional group tolerance, and high regio- and <i>Z</i>-selectivity, affording diverse monofluorinated alkenes in good to excellent yields. The resulting fluoroalkenes serve as versatile intermediates for downstream functionalization, highlighting the synthetic utility of this Si-F-driven platform.