Structure and properties of 1- and 3-hydroxytriazolo [4,5-b] pyridines

It is shown that 1-hydroxytriazolo4,5-b]pyridine exists in alcohol solution primarily in the N-oxide form, whereas 3-hydroxytriazolo4,5-b]pyridine exists in the hydroxy form. 4-Methyl-triazolo4,5-b]pyridine 1-oxide is formed in the methylation of 1-hydroxytriazolo4,5-b]pyridine, whereas 3-methoxytriazolo4,5-b]pyridine is formed in the methylation of 3-hydroxytriazolo4,-5-b]pyridine.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1418–1421, October, 1976.