Solid Acid Induced Cyclocondensation: A Facile, One-Pot Synthesis of 7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazines
作者:M. M. Heravi、M. Bakherad、M. Rahimzadeh、M. Bakavoli
DOI:10.1080/10426500214303
日期:2002.10
7H-[1,2,4]Triazolo[3,4-b][1,3,4]thiadiazines are synthesized in good yields by the catalytic action of sulfuric acid adsorbed on sillica gel. Starting from 4-amino-5-substituted-1,2,4-triazole-3-thiones and employing cyclocondensation reaction with f -chloroacetonitrile and f -haloketones, the desired triazolothiadiazines have been synthesized satisfactorilly.
7H-[1,2,4]三唑并[3,4-b][1,3,4]噻二嗪通过吸附在硅胶上的硫酸的催化作用以良好的产率合成。以4-氨基-5-取代-1,2,4-三唑-3-硫酮为原料,与f-氯乙腈和f-卤代酮进行环缩缩合反应,成功合成了所需的三唑噻二嗪。