Ten unreported compounds 4-(p-substituted phenyl)-2-[2-(substituted phenyl)-furoyl-4-amido]- 1',3',4'-triazolo[1,2-d]-1,3,4-thiadiazoles were synthesized by the reaction of 1-amino-5-mercapto-2-(p- substituted phenyl)-1,3,4-triazoles with 5-(substituted phenyl)-2-furoyl isothiocyanates. Their structures were determined by elemental analysis, ¹H NMR, IR and MS techniques, and preliminary bio-logical test indicated that the compounds had some herbicidal activities.

Key words: 1,3,4-triazolo[1,2-d]-1,3,4-thiadiazole, synthesis, amide, herbicidal activity