Abstract The cyclization of 1-amino-2-mercapto-5-[1-(4-ethoxyphenyl)-5-methyl-1, 2, 3- triazol-4-yl]-1, 3, 4-triazole which was synthesized from p-ethoxyaniline with various triazole acid in absolute phosphorus oxychloride yields 3, 6-bis (1, 2, 3-triazolyl)-s-triazolo [3, 4-b]-1, 3, 4-thiadiazole derivatives 9aj, and their structures are established by MS, IR, CHN and 1 H NMR spectral data.
