Currently, the catalytic and selective C(sp 3 )-C activation of ketones still remains a challenge, 10 and Baeyer-Villiger oxidation 11 and Büchner-Curtius-Schlotterbeck reaction 12 constitute the traditional approaches enabling a single atom insertion into the C(sp 3 )-C bond of ketones. Recently, transitionmetal catalyzed C(sp 3 )-C bond activation and functionalization of ketones have received remarkable attraction, despite substrate scope being limited to either 1,3-dicarbonyl 13 or strained motifs. 10d, 14 Additionally, directing groups 15 and/or high temperatures 16 are often required for successful activation. Most recently, photochemistry has been utilized as an efficient method to address these issues, and cyclic ketone-derived oxime esters and oxime carboxylic acids have been successfully installed with α-trifluoromethyl alkenes to forge gem-difluoroalkenes. 17 Notwithstanding these advances, a platform enabling gem-difluoroalkene construction via C(sp 3 )-C bond activation of general ketones especially acyclic ketones still remains elusive.