Copper-Catalyzed Direct Amination of Quinoline N?Oxides via C-H Bond Activation under Mild Conditions

摘要

A highly efficient and concise one-pot strategy for the direct amination of quinoline N-oxides via coppercatalyzed dehydrogenative C-N coupling has been developed. The desired products were obtained in good to excellent yields for 22 examples starting from the parent aliphatic amines. This methodology provides a practical pathway to 2-aminoquinolines and features a simple system, high efficiency, environmental friendliness, low reaction temperature, and ligand, additives, base, and external oxidant free conditions.