Trifluoromethylation of Carbonyl and Unactivated Olefin Derivatives by C(sp 3 )-C Bond Cleavage.

Herein, we report a Cu-mediated trifluoromethylation of carbonyl-type compounds and unactivated olefins enabled by visible-light irradiation via σ C(sp )-C bond-functionalization. The reaction is distinguished by its modularity, mild conditions and wide scope-even in the context of late-stage functionalization-thus offering a complementary approach en route to valuable C(sp )-CF architectures from easily accessible precursors.