Nickel-catalyzed decarboxylative cycloaddition of isatoic anhydrides with alkenes

A new method for the synthesis of tricyclic 2,3-dihydro-4-quinolones by the NiCl2(PMe3)2-catalyzed carboamination of alkenes by intermolecular decarboxylative cycloaddition reaction is reported here. Isatoic anhydrides were reacted with various norbornenes to afford the novel structure of quinolones. This protocol is simple and easy to handle.