Novel and efficient synthesis of 4-sulfonyl-2-pyridones

Heterocyclic 4-sulfonyl-2-pyridones represent useful scaffolds for drug discovery and are also versatile synthetic building blocks. Herein we describe a novel and efficient synthesis of this heterocyclic ring system utilizing an acid mediated cyclo-condensation reaction. This synthetic method affords convenient access to structurally diverse N-substituted 4-sulfonyl-2-pyridones in moderate to good yields. (c) 2009 Elsevier Ltd. All rights reserved.