A process for the synthesis of Fipronil

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专利权人:

Keki Gharda

发明人:

Gharda, Keki Hormusji

申请号：

AU2011101658

公开号：

AU2011101658A4

申请日:

2011.12.19

申请国别(地区):

AU

年份:

2012

代理人:

摘要：

#$%^&*AU2011101658A420120119.pdf#####ABSTRACT The present invention provides a process for the preparation of a compound of formula (I) 5-Amino-i -(2,6-dichloro-4-trifluoromethylphenyl)-3 -cyano-4-tri fluoro methyl 5 sulphinyl pyrazole ( Fipronil) by oxidizing a compound 5-amino-1-(2,6-dichloro-4trifluoromethylphenyl)-3-cyano-4-trifluoromethylthio-pyrazole of formula (II) with sulfuric acid and hydrogen peroxide as an oxidizing agent. CI CN CI CN CF 3 N __CF 3 / N C F 3 r S O C E F 3 N S C E CI NH 2 S 3 CI NH 2 10 [I] [II]

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