4-thiadiazole. Under the same experimental conditions, N-substituted thioureas are also condensed to 1,2,4-thiadiazole derivatives; their structure is ascertained by spectroscopic properties and by X-ray diffraction. Some information on the mechanism of thiadiazoles formation from both starting classes of compounds, thiobenzamides and N-substituted thiourea, is collected and discussed.
在
二甲亚砜和酸的存在下,
硫代苯甲酰胺(以及亚
硫磺酰胺和异
硫代酰胺)的缩合反应得到3,5
-二苯基-1,2,4-噻二唑。在相同的实验条件下,N-取代的
硫脲也被缩合为
1,2,4-噻二唑衍
生物。它们的结构通过光谱性质和X射线衍射确定。收集并讨论了有关从两种起始化合物
硫代苯甲酰胺和N-取代的
硫脲形成
噻二唑的机理的一些信息。