Synthesis of 6-nitrobenzimidazole derivatives

A series of new s-triazolo[3, 4-b]-1, 3, 4-thiadiazole, 1, 2, 4-triazole an d 1, 3, 4-oxadiazole derivatives were synthesized from 6-nitrobenzimidazol- 1-acetic acid hydrazide and 4-amino-5-mercapto-3(6-nitrobenzimidazol-1-meth ylene)-1, 2, 4-triazole, respectively. The structures of the compounds synt hesized were confirmed by elemental analyses, H-1 NMR, IR and MS. Their spe ctral properties were also discussed.