Palladium-Catalyzed Carbonylative [3+2+1] Annulation of<i>N</i>-Aryl-Pyridine-2-Amines with Internal Alkynes by CH Activation: Facile Synthesis of 2-Quinolinones
We describe here a novel procedure for the synthesis of highly substituted 2‐quinolinones. By this newly developed approach, 2‐quinolinone derivatives were prepared in moderate to good yields by carbonylative cyclization of N‐aryl‐pyridine‐2‐amines and internal alkynes by CH activation. Remarkably, [Mo(CO)6] was applied as a solid CO source and the reaction proceeded in an atom economic manner.