申请人:THE DOW CHEMICAL COMPANY
公开号:EP0375060A1
公开(公告)日:1990-06-27
A process for preparing 5-acylamino-1,2,4-triazole-3-sulfonamides, which are useful intermediates for the preparation of 1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonamide herbicides, from 5-amino-3-mercapto-1,2,4-triazole by sequential acylation to 5-acylamino-3-mercapto-1,2,4--triazoles, chlorination to 5-acylamino-3-chlorosulfonyl-1,2,4-triazoles, and condensation with substituted anilines to 5-acylamino-1,2,4-triazole-3-sulfonamides is provided. Novel 5-acylamino-3-chlorosulfonyl-1,2,4--triazole compounds are key intermediates in the process.
一种制备 5-酰氨基-1,2,4-三唑-3-磺酰胺的工艺,它是制备 1,2,4-三唑并[1,5-a]嘧啶-2-磺酰胺除草剂的有用中间体、4-三唑,通过顺序酰化生成 5-酰氨基-3-巯基-1,2,4-三唑,氯化生成 5-酰氨基-3-氯磺酰基-1,2,4-三唑,与取代的苯胺缩合生成 5-酰氨基-1,2,4-三唑-3-磺酰胺类除草剂。新型 5-酰氨基-3-氯磺酰基-1,2,4-三唑化合物是该工艺的关键中间体。