Copper(II)‐Catalyzed Three‐Component Cascade Annulation of Diaryliodoniums, Nitriles, and Alkynes: A Regioselective Synthesis of Multiply Substituted Quinolines

Three become one: Multiply substituted quinolines were synthesized from diaryliodoniums, alkynes, and nitriles by a CuII-catalyzed method. This cascade annulation is highly regioselective, step-economic, flexible with regard to the functional groups, and could potentially be applied to the synthesis of complex molecules.