| Abstract: | 1,2,4-Triazolo[3,4-b]-1,3,4-thiadiazines, hydrazones, and  -thio adducts were obtained by reactions of 4-amino-3-mercapto-1,2,4-triazole with  -bromoacetophenones, aldehydes, and  ,-unsaturated ketones. Conditions that promote the cyclocondensation of the -thio adducts to the previously undescribed 1,2,4-triazolo[3,4-b]-1,3,4-thiadiazepines were found. The chemical and spectral properties of the compounds obtained are discussed.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 267–272, February, 1992. |
