Copper‐Catalyzed Bromination of C(sp3)−H Bonds Distal to Functional Groups

Selective bromination of γ‐methylene C(sp³)−H bonds of aliphatic amides and δ‐methylene C(sp³)−H bonds of nosyl‐protected alkyl amines are developed using NBS as the brominating reagent and catalytic amount of Cu^II/phenanthroline complexes as the catalyst. Aryl and benzylic C−H bonds at other locations remain intact during this directed radical abstraction reaction.