The synthesis and biological activities of 6-aryl-3-(D-glucoheptonic-hexitol-1-yl)-7H-1,2,4-triazolo[3,4-b][1,3,4]thiadiazines

A series of novel 6-aryl-3-(D-glucoheptonic-hexitol-1-yi)-7H-1,2,4-triazolo[3,4-bl[1,3,41 thiadiazines (2a-2j) have been synthesised in high yield by means of the reaction of 4-amino-5-mercapto-3-(D-glucoheptonic-hexitol-1-yl)1,2,4-triazole (1) with substituted (omega-brom- oacetophenones. The structures of the compounds were determined by elemental analysis, IR, H-1 NMR, C-13 NMR and MS. Most possessed high plant growth-regulating activities.