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

摘要

Title compds. (I; R = H, C1-12 alkyl, cyclopropyl, CF3; R1 = H, Br, C1, F ; R2, R3 = H, C1-3 alkyl, C1-3 alkoxy, Br, C1, F, CF3), useful as fungicides and bactericides (no data), were prepd. by the reaction of II and same mole base at 60-200≦̸C, in amide anhydride. Thus, 4-(2,4-dichloro- phenyl)-5-methyl-1,2,4-triazole-3-thiol in DMF was refluxed for 24hr adding NaOH followed by extrating with ethylacetate using liq-liq extractor to give 7-chloro-3-methyl-S-triazolo [3,4-b benzothiazole.