发明授权
- 专利标题： Conversion of pyrethroid isomers to more active species
- 专利标题（中）： 将拟除虫菊酯异构体转化为更多的活性物质
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申请号： US460445申请日： 1990-01-03
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公开(公告)号： US5128497A公开(公告)日： 1992-07-07
- 发明人: John W. Ager
- 申请人： John W. Ager
- 申请人地址： PA Philadelphia
- 专利权人： FMC Corporation
- 当前专利权人： FMC Corporation
- 当前专利权人地址： PA Philadelphia
- 主分类号： C07C255/39
- IPC分类号： C07C255/39
摘要：
Crystalline pyrethroid isomers or enantiomer pairs are converted to more pesticidally active isomers by contacting a hydrocarbon slurry of the starting isomers with an epimerization agent selected from the group consisting of 1,1,3,3-tetramethylguanidine and 1,8-diazabicyclo[5.4.0]undec-7-ene, agitating the slurry while maintaining a temperature effective for conversion, and recovering the resulting isomers. The process typically is effective for enriching cypermethrin, and cyfluthrin.
公开/授权文献
- US5672024A Prepackaged ball joint 公开/授权日：1997-09-30
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