Copper-Catalyzed Diamination of Alkenes using o -Benzoylhydroxylamines to Access the Four Azaindoline Families.

A mild and efficient method for the copper-catalyzed diamination of alkenes is described. In this reaction, o -benzoylhydroxylamine serves as an electrophilic nitrogen source for the regioselective formation of C-N bonds. This transformation provides a novel strategy for synthesizing all four isomeric 2,3-disubstituted azaindoline families and offers a wide substrate scope.