Copper and DMAP relay‐catalyzed three‐component coupling of terminal alkynes, anthranils and alcohols for the modular synthesis of 2‐alkoxy quinolines

A copper and DMAP relay‐catalyzed strategy has been achieved for the modular synthesis of 2‐alkoxy quinolines from a three‐component coupling of terminal alkynes, anthranils, and alcohols. In this protocol, a novel quinoline pyridine salt is formed and serves as a key intermediate in the formation of 2‐alkoxy quinolines. The reaction has a broad substrate scope of each reaction partners, affording diversified 2‐alkoxy quinoline products in generally good yields.