N-3-oxoalkylamides and- thioamides in the synthesis of heterocyclic compounds 5. Synthesis of 1-(4-hydroxy-2-oxo-3-piperidyl)-pyridinium chlorides and 2-pyridones from pyridinium derivatives of N-3-oxoalkylchloroacetamides

Abstract

and 1-(4-hydrox-y-2-oxo-3-piperidyl)pyridinium chlorides have been obtained by the intramolecular cyclization of N-3-oxoalkylchloroacetamides under the action of tertiary amines.