Iridium-Catalyzed Annulation of N-Arylcarbamoyl Chlorides with Internal Alkynes
摘要:
An iridium complex successfully catalyzed the annulation of various N-arylcarbamoyl chlorides with internal alkynes to afford 2-quinolones in good to excellent yields. The present reaction is widely applicable to substrates with various functionalities. An amide-iridacycle complex was isolated, and it is likely that such an iridacycle species is a key intermediate in the catalytic reaction.
straightforward synthesis of halogen‐containing quinolin‐2(1H)‐ones. The reaction proceeds without preactivation and directing groups through direct N–H and C–H bondactivation with a broad substrate scope and high efficiency. Halogen functional groups can be well tolerated here. Remarkably, this is the first example of an iridium‐catalyzed carbonylative C–H activation of anilines.