发明授权
- 专利标题： PROCESS FOR THE PREPARATION OF CYPERMETHRINE ISOMERS
- 专利标题（中）： 制备CYPERMETHRINE异构体的方法
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申请号： EP90901870.7申请日： 1990-01-17
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公开(公告)号： EP0404922B1公开(公告)日： 1993-06-09
- 发明人: ZOLTAN, Sándor , HIDASI, Cyörgy , BERTOK, Béla , SZEKELY, István , HAJIMICHAEL, Janis , BOTAR, Sándor , NAGY, Lajos , SOMFAI, va , LAK, István , RAPI, András , GAJARY, Antal , HEGEDÜS, Agnes , TARY, Mária
- 申请人： CHINOIN Gyogyszer és Vegyészeti Termékek Gyára RT.
- 申请人地址： To utca 1-5 H-1045 Budapest IV HU
- 专利权人： CHINOIN Gyogyszer és Vegyészeti Termékek Gyára RT.
- 当前专利权人： CHINOIN Gyogyszer és Vegyészeti Termékek Gyára RT.
- 当前专利权人地址： To utca 1-5 H-1045 Budapest IV HU
- 代理机构： Ahner, Francis
- 优先权： HU16789 19890117; HU678089 19891227
- 国际公布： WO9008132 19900726
- 主分类号： C07C255/14
- IPC分类号： C07C255/14
摘要：
The invention relates to a process for the preparation of such isomer mixtures of cypermethrine of formula (I), wherein carbon atoms indicated by 1,3 and α stand for a chiral carbon atom and the wavy line indicates cis or trans configuration related to the cyclopropane ring - which contains out of the theoretically possible 8-isomers of cypermethrine at least 95 % of 1RtransS and 1StransR (Ib) isomer pair or only a mixture of 1RcisS and 1ScisR (Ia) and the isomer pair (Ib) of the ratio (Ia):(Ib) = 55:45 - 25:75 by asymmetric transformation of second order performed in the presence of an amine base and solvent from a starting cypermethrine isomer mixture which contains next to the isomer pair (Ib) cis and other trans isomers or the isomer pair Ia + Ib at an undesired ratio.
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