Ruthenium(II)-Catalyzed Traceless C−H Functionalization Using an N−N Bond as an Internal Oxidant.

A previously elusive RuII-catalyzed N−N bond-based traceless C−H functionalization strategy is reported. An N-amino (i.e., hydrazine) group is used for the directed C−H functionalization with either an alkyne or an alkene, affording an indole derivative or olefination product. The synthesis features a broad substrate scope, superior atom and step economy, as well as mild reaction conditions. [ABSTRACT FROM AUTHOR]