[5C + 1N] Annulation: a novel synthetic strategy for functionalized 2,3-dihydro-4-pyridones†
Abstract
A novel and facile route to functionalized mono/bicyclic 2,3-dihydro-4-pyridones has been developed via formal [5C + 1N] annulation of readily available α-alkenoyl ketene-(S,S)-acetals with various aliphatic