A simple and efficient copper-catalyzed method has been developed for synthesis of bicyclic pyrimidinones containing six-, seven-, eight-membered rings undermildconditions. The protocol uses readily available 2-bromocycloalk-1-enecarboxylic ac- , ids, amidines, and guanidines as the starting materials, copper-catalyzed cascade couplings provide the corresponding bicyclic pyrimidinones without addition