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1.发明授权PROCESS FOR THE PREPARATION OF FIPRONIL, AN INSECTICIDE, AND RELATED PYRAZOLES 有权用于生产FIBRONIL，杀虫剂，以及相关的吡唑
公开(公告)号：EP2069311B1
公开(公告)日：2012-05-16
申请号：EP06744557.7
申请日：2006-04-25
发明人： GHARDA, Keki, Hormusji , MALTE, Ashokkumar, Maganlal , JOSEPH, Pulinattu, Cherian , PARKAR, Sureshkumar, Dattatraya , SATHE, Shekhar, Vishwanath , DAMANIA, Pragnesh, Dalpatram
IPC分类号： C07D231/44
CPC分类号： C07D231/44
摘要： This invention relates to a process for the preparation of 5-amino-1-phenyl-3-cyano-4-trifluoromethyl sulphinyl pyrazoles as defined by Formula- I, wherein: Rl = trif luoromethyl or trif luoromethoxy, and R2, R3 = individually hydrogen, chlorine or bromine , the process comprising the step of oxidizing a compound of Formula- II, wherein: Rl = trifluoromethyl or trif luoromethoxy, and R2, R3 = individually hydrogen, chlorine or bromine , in a medium comprising at least one oxidizing agent and trichloro acetic acid, and/or the reactions product (s) of the at least one oxidizing agent and trichloro acetic acid, and at least one melting point depressant. The preferred pyrazole is Fipronil, preferably prepared using hydrogen peroxide and dichloro acetic acid at room temperature .
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2.发明公开PROCESS FOR THE PREPARATION OF FIPRONIL, AN INSECTICIDE, AND RELATED PYRAZOLES 有权用于生产FIBRONIL，杀虫剂，以及相关的吡唑
公开(公告)号：EP2069311A1
公开(公告)日：2009-06-17
申请号：EP06744557.7
申请日：2006-04-25
发明人： GHARDA, Keki, Hormusji , MALTE, Ashokkumar, Maganlal , JOSEPH, Pulinattu, Cherian , PARKAR, Sureshkumar, Dattatraya , SATHE, Shekhar, Vishwanath , DAMANIA, Pragnesh, Dalpatram
IPC分类号： C07D231/44
CPC分类号： C07D231/44
摘要： This invention relates to a process for the preparation of 5-amino-1-phenyl-3-cyano-4-trifluoromethyl sulphinyl pyrazoles as defined by Formula- I, wherein: Rl = trif luoromethyl or trif luoromethoxy, and R2, R3 = individually hydrogen, chlorine or bromine , the process comprising the step of oxidizing a compound of Formula- II, wherein: Rl = trifluoromethyl or trif luoromethoxy, and R2, R3 = individually hydrogen, chlorine or bromine , in a medium comprising at least one oxidizing agent and trichloro acetic acid, and/or the reactions product (s) of the at least one oxidizing agent and trichloro acetic acid, and at least one melting point depressant. The preferred pyrazole is Fipronil, preferably prepared using hydrogen peroxide and dichloro acetic acid at room temperature .
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