PROCESS FOR THE PREPARATION OF S-TRIAZOLO(3,4-B)BENZOTHIAZOLES

摘要

R = H, C1-11 alkyl, cyclopropyl, CF3 ; R1 = H, Br, C1, F ; R2 , R3 = H, C1-3 alkl, C1-3 alkoxy, Br, C1, F, CF3), useful as fungicides, were prepd. by reaction of the acylhydrazine (II) with equi. mol. O-halophenyl-isocyanate (III; X = Br, Cl, F) at 60-100≦̸C for 24hr, followed by reac- tion of equi. mol. base at 60-200≦̸C in anhydrous amide solvent to give I.