The synthesis of 4-amino-3-(D-gluco- or D-galacto-pentitoi-1.yl)-5-mercapto
-1,2,4-triazoles and their conversion to the respective 6-methyl-3-(1,2,3,4
,5-penta-O-acetyl-pentitol-1-yl)1,2,4-triazolo[3,4-b] 1,3,4-thiadiazoles ha
ve been achieved. The vicinal coupling constants were used to deduce the fa
vored conformations.