发明申请
- 专利标题: FIPRONIL PRODUCTION PROCESS
- 专利标题(中): FIPRONIL生产工艺
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申请号: US13926389申请日: 2013-06-25
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公开(公告)号: US20130289283A1公开(公告)日: 2013-10-31
- 发明人: Anat Levin , Michael Grabarnick
- 申请人: Anat Levin , Michael Grabarnick
- 主分类号: C07D231/44
- IPC分类号: C07D231/44
摘要:
An improved oxidation process for preparing 5-amino-3-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)-4-trifluoromethylsulphinyl-pyrazole, of formula (I) is described. The process includes admixing 5-amino-3-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)-4-trifluoromethylthiopyrazole of formula (II) with dichloroacetic acid and hydrogen peroxide in the presence of a strong acid.