Photoredox-catalyzed allylation of C(sp ³ )–H bonds in <i>N</i> -trifluoroethyl hydroxylamines or hydroxamides <i>via</i> hydrogen atom transfer

Herein, we present an organophotoredox-catalyzed nitrogen-centered radical-triggered allylation reaction that enables the synthesis of trisubstituted alkenes from MBH adducts and <i>N</i>-trifluoroethylhydroxylamine reagents or hydroxamides <i>via</i> a hydrogen atom transfer (HAT) strategy. When <i>N</i>-trifluoroethylhydroxylamine reagents were employed as radical precursors, various homoallylic α-trifluoromethylamines were generated through 1,2-HAT of the <i>in situ</i>-generated <i>N</i>-trifluoroethyl radicals. Moreover, a series of hydroxamides (1,5-HAT reagents) could be tolerated by this catalytic system, affording the corresponding alkyl amides with excellent yields.