Base catalyzed cycloaddition on N-phenyl-4, 6-diphenyl-3acetyl-2-pyridone

It has been reported that alpha, Beta-unsaturated ketones react with nucleophiles to give under different conditions either the open chain addition products or a new heterocyclic system by normal addition followed by cyclization. In the present investigation the authors introduce N-aryl-2-pyridone heterocyclic ring to investigate to what extent the a 6-unsaturated system can be affected by replacement that pyridone ring and to emphasize the general concept that the carbonyl group in alpha, Beta-unsaturated moiety is still kinetically reactive even if it is present together with the electrical localized carbonyl which inhibits the proton tautomeric effect by N-phenyl replacement