Two Consecutive Palladium(II)‐Promoted CH Alkenylation Reactions for the Synthesis of 3‐Alkenylquinolones

Highly substituted quinolones are obtained through an efficient and atom economical procedure that involves two consecutive palladium(II)-catalyzed CH alkenylation reactions. A selective 6-endo intramolecular CH alkenylation leads to 4-substituted quinolones that have been further functionalized at C-3 through a second intermolecular CH alkenylation reaction.