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Quinolinones are an important class ofheterocycles, which have been known to exhibit a broad range of biological properties including antibiotic,1 anticancer,2 antiviral,3 and antihypersensitivity.4 We report here an efficient metal-free oxidative C(sp2)-N formation reaction for the synthesis of quinolinones.And the obtained quinolinones are applied to the synthesis of pyrrolo[3,2-c]quinolinones via an amines rion-opening reaction.