Visible Light‐Driven Catalyst‐Free Amination of Indoles Initiated by Electron Donor‐Acceptor Complexes

Comprehensive Summary The visible light‐driven C2 or C3 amination of indoles without any additives was initiated via electron donor‐acceptor (EDA) complex formed by indole and N ‐aminopyridinium salt. This method was compatible with a wide range of substrates and could proceed smoothly without the addition of any photocatalysts, transition‐metal catalysts, or bases. A variety of studies were carried out to examine the presence of EDA complex.