以3,4,5-三甲氧基苯甲酸为原料,通过4步反应得到4-氨基-5-(3,4,5-三甲氧基苯基)-3-巯基-1,2,4-三唑,再与取代芳酸反应,得到11个6.取代-3-(3,4,5-三甲氧基苯基)-1,2,4-三唑[3,4—6.[1,3,4】噻二唑衍生物5a~5k.其结构经IR,1HNMR,MS和元素分析确证.初步生物活性测试结果表明部分化合物有一定的杀菌活性.
Eleven 6-(substituted)-3-(3,4,5-trimethoxyphenyl)-1,2,4-triazolo[3,4-b][1,3,4]thiadiazole derivatives 5a~5k were synthesized by cyclization of 4-amino-5-(3,4,5-trimethoxybenzyl)-3-mercapto-1,2,4- triazole (4) with various substituted aromatic acids through a single step reaction. IR, 1H NMR, MS techniques and elemental analysis confirmed the structures of the newly synthesized compounds. Preliminary bioassays indicated that some compounds showed fungicidal activity.