Organic molecules containing seven-membered rings are important structural motifs for drug candidates, but the construction of seven-membered rings can be challenging through traditional cyclization pathways. Here, the authors report a copper-catalyzed alkyne oxidation and Büchner-type ring-expansion to generate benzo[6,7]azepino[2,3-b]quinolines and pyridine-based diones.
- Xiao-Lei Jiang
- Qing Liu
- Wen-Bo Shen
