Copper-Catalyzed N-Arylation of Pyranoquinolinones with Boronic Acids at Room Temperature without Ligand

Pyranoquinolinones synthesized from citral were used for Cu-catalyzedN-arylation with a wide range of arylboric acids. The reaction proceeded well with a broad substrate scope, providing a direct way to access highly functional pyranoquinolinone core structure derivatives in yields of up to 80%. Compared to citral, the compounds we obtained have a much better inhibitory effect on HeLa cervical cancer cells, and compound3phas an IC50value of 4.6 μM, lower than cisplatin’s 5.9 μM.Keywords:citral;pyranoquinolinone;N-arylation