| Abstract: | Thiazolo[4,5-b]-2-pyridylhydrazine, which like 2-benzothiazolylhydrazine, undergoes autooxidation in ethanol solution to give a symmetrical 1,5-bis(thiazolo[4,5-b]-2-pyridyl)-3-methylformazan, was synthesized. Asymmetrical 1,5-dihetarylformazans were obtained by autooxidative coupling of 2-hydrazinobenzothiazole with acetaldehyde thiazolo[4,5-b]-2-pyridylhydrazone and 5-nitro-2-pyridyl hydrazone. Formazans containing a thiazolopyridine ring have more acidic character than benzothiazolylformazans.See [1] for communication XXXVIII.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 925–927, July, 1975. |
