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US5905157A Process for producing 2-(methylthio)-5-(trifluoromethyl)-1,3,4-thiadiazole using methyldithiocarbazinate and trifluoroacetic acid 失效
甲基二硫代肼基甲酸酯和三氟乙酸生产2-(甲硫基)-5-(三氟甲基)-1,3,4-噻二唑的方法

Process for producing
2-(methylthio)-5-(trifluoromethyl)-1,3,4-thiadiazole using
methyldithiocarbazinate and trifluoroacetic acid
摘要:
The present invention provides a process of making 2-(methylthio)-5-(trifluoromethyl)-1,3,4-thiadiazole. The process includes the steps of (a) reacting methyldithiocarbazinate with a molar excess of trifluoroacetic acid; and (b) removing the water and excess trifluoroacetic acid. Water and excess trifluoroacetic acid are preferably removed via distillation.
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