申请人:Morton-Norwich Products, Inc.
公开号:US04283543A1
公开(公告)日:1981-08-11
A process for preparing the compound 5-t-butyl-2-methylamino-1,3,4-thiadiazole, ##STR1## in high yield by the reaction of 4-methyl-3-thiosemicarbazide with pivalic acid in a solution containing both polyphosphoric acid and concentrated sulfuric acid, followed by neutralizing the reaction mixture with a neutralizing mixture comprising an organic solvent and an alkaline substance dissolved in water and separating 5-t-butyl-2-methylamino-1,3,4-thiadiazole from the organic phase.
一种制备5-t-叔丁基-2-甲基氨基-1,3,4-噻二唑化合物的方法,##STR1## 高收率反应是将4-甲基-3-硫脲与季戊酸在含有聚磷酸和浓硫酸的溶液中反应,然后用一种中和混合物中和反应混合物,该中和混合物包含有机溶剂和溶解在水中的碱性物质,并将5-t-叔丁基-2-甲基氨基-1,3,4-噻二唑从有机相中分离出来。