Sixth People's Hospital South Campus, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, and School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China. [Email]
An efficient and convenient copper-mediated method has been developed to achieve direct cascade C-H/N-H annulation to synthesize 2-quinolinones from electron-deficient acrylamides and arynes. This method highlights an emerging but simple strategy to transform inert C-H bonds into versatile functional groups in organic synthesis to provide a new method of synthesizing 2-quinolinones efficiently. Mechanistic investigations by experimental and density functional theory (DFT) studies suggest that an organometallic C-H activation via a Cu(iii) intermediate is likely to be involved in the reaction.