Electrochemical C−H/N−H Functionalization for the Synthesis of Highly Functionalized (Aza)indoles.

Indoles and azaindoles are among the most important heterocycles because of their prevalence in nature and their broad utility in pharmaceutical industry. Reported herein is an unprecedented noble-metal- and oxidant-free electrochemical method for the coupling of (hetero)arylamines with tethered alkynes to synthesize highly functionalized indoles, as well as the more challenging azaindoles. [ABSTRACT FROM AUTHOR]