A facile and efficient one-pot synthesis of polysubstituted pyridin-2(1H)-ones from a variety of beta-oxo amides underVilsmeierconditions is described, and a mechanism involving sequential halogenation, formylation and intramolecular nucleophilic cyclization is proposed.
A facile and efficient one-pot synthesis of halogenated pyridin-2(1H)-ones from a series of readily available enaminones underVilsmeierconditions is described, and a mechanism involving sequential halogenation, formylation, and intramolecular nucleophilic cyclization is proposed.