Pyridine‐N‐oxide as an intermediate for the preparation of 2‐ and 4‐substituted pyridines

Abstract

Abstract A description is given of methods for the preparation of 4‐, 2,4‐ and 3,4‐substituted pyridines, e.g. 4‐aminopyridine. the N‐oxide of pyridine or derivatives of pyridine is used as an intermediate to make e pyridine nucleus accessible for substitution in positions 2 and 4.