1,2,4‐Triazoles. XXV. The effect of pyridine substitution on the isomerization of <i>s</i>‐Triazolo[4,3‐<i>a</i>] pyridines into <i>s</i>‐Triazolo[1,5‐<i>a</i>] pyridines

Abstract

Abstract The isomerization of s ‐triazolo[4,3‐ a ]pyridines into s ‐triazolo[1,5‐ a ]pyridines is greatly facilitated by electron withdrawing nitro substituents in the pyridine ring and retarded by electron donating amino groups.