Reactions of triazolethiones with haloacetic acids were studied with 5-(4-methylphenyl)-2,4-dihydro-3H-1,2,4-triazole-3-thione as an example. It was proved for the first time by X-ray diffraction that the cyclocondensation of these compounds proceeds regiospecifically to give 2-(4-methylphenyl)[1,3]thiazolo[3,2-b][1,2,4]triazol-6(5H)-one rather than its isomer 3-(4-methylphenyl)[1,3]thiazolo[2,3-c][1,2,4]triazol-5(6H)-one.
以 5-(4-甲基苯基)-2,4-二氢-3H-
1,2,4-三唑-3-硫酮为例,研究了三唑
硫酮与卤
乙酸的反应。通过 X 射线衍射法首次证明,这些化合物的环缩合反应是以特定的方式进行的,生成 2-(4-甲基苯基)[1,3]
噻唑并[3,2-b][1,2,4]三唑-6(5H)-酮,而不是其异构体 3-(4-甲基苯基)[1,3]
噻唑并[2,3-c][1,2,4]三唑-5(6H)-酮。