申请人:E. I. Du Pont de Nemours and Company
公开号:US04013649A1
公开(公告)日:1977-03-22
Method of making 4-amino-6-t-butyl-3-mercapto-1,2,4-triazin-5-one comprising halogenating a 3,3-dimethylbutyric acid with Br.sub.2 or Cl.sub.2 to produce a 2,2-dihalo-3,3-dimethylbutyric acid then reacting the latter with thiocarbohydrazide. Alternatively, a 3,3-dimethylbutyryl chloride can be used as starting material, in which case the halogenation product is contacted with water, an aqueous base, an alcohol, a mercaptan, or an amine to convert it to an acid or salt thereof, anhydride, ester, thioester or amide, and the latter is reacted with thiocarbohydrazide.
制备4-氨基-6-t-丁基-3-巯基-1,2,4-三嗪-5-酮的方法包括将3,3-二甲基丁酸与Br.sub.2或Cl.sub.2进行卤代反应,生成2,2-二卤代-3,3-二甲基丁酸,然后将后者与硫代羟肼反应。另外,也可以使用3,3-二甲基丁酰氯作为起始物质,此时卤代产物与水、水溶性碱、醇、巯基化合物或胺接触,将其转化为酸或其盐、酸酐、酯、硫酯或酰胺,然后将后者与硫代羟肼反应。