| 发明名称 |
FIPRONIL PRODUCTION PROCESS |
| 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. |
| 申请公布号 |
US2014155620(A1) |
申请公布日期 |
2014.06.05 |
| 申请号 |
US201414174406 |
申请日期 |
2014.02.06 |
| 申请人 |
IRVITA PLANT PROTECTION, A BRANCH OF CELSIUS PROPERTY B.V. |
发明人 |
LEVIN Anat;GRABARNICK Michael |
| 分类号 |
C07D231/44 |
主分类号 |
C07D231/44 |
| 代理机构 |
|
代理人 |
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| 主权项 |
1. A process for preparing 5-amino-3-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)-4-trifluoromethylsulphinyl-pyrazole, fipronil, of formula (I) wherein the process comprises: 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; quenching the reaction mixture; isolating the compound of formula (I); and optionally purifying the obtained compound of formula (I).
|
| 地址 |
Willemstad CW |
