发明授权
US4988812A Aqueous process for the preparation of
5-methyl-n-(aryl)-1,2,4-triazolo(1,5-A)pyrimidine-2-sulfonamides
失效
用于制备5-甲基 - 正 - (芳基)-1,2,4-三唑并(1,5-A)嘧啶-2-磺酰胺的水性方法
- 专利标题: Aqueous process for the preparation of 5-methyl-n-(aryl)-1,2,4-triazolo(1,5-A)pyrimidine-2-sulfonamides
- 专利标题(中): 用于制备5-甲基 - 正 - (芳基)-1,2,4-三唑并(1,5-A)嘧啶-2-磺酰胺的水性方法
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申请号: US432241申请日: 1989-11-06
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公开(公告)号: US4988812A公开(公告)日: 1991-01-29
- 发明人: Kay K. Kim , Richard C. Krauss , Jon A. Orvik
- 申请人: Kay K. Kim , Richard C. Krauss , Jon A. Orvik
- 申请人地址: IN Indianapolis
- 专利权人: Dow Elanco
- 当前专利权人: Dow Elanco
- 当前专利权人地址: IN Indianapolis
- 主分类号: A01N43/90
- IPC分类号: A01N43/90 ; C07D249/14 ; C07D487/04
摘要:
5-Methyl-N-(aryl)-1,2,4-triazolo[1,5-a]-pyrimidine-2-sulfonamides are prepared by the cyclization of N -(3-(((aryl)amino)sulfonyl)-1H-1,2,4-triazol-5-yl)amines with 4-methoxy-3-butene-2-one or its synthetic equivalents in the presence of an aqueous base. By controlling the pH of the condensation between 8.5 and 10.5, by-product formation can be substantially reduced.
公开/授权文献
- US3937371A Automatically opening and closing closure device 公开/授权日:1976-02-10
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