Invention Application
- Patent Title: PROCESS FOR THE PREPARATION OF CYPERMETHRINE ISOMERS
- Patent Title (中): 制备CYPERMETHRINE异构体的方法
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Application No.: PCT/HU1990000006Application Date: 1990-01-17
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Publication No.: WO1990008132A1Publication Date: 1990-07-26
- Inventor: CHINOIN GYOGYSZER ÉS VEGYÉSZETI TERMÉKEK GYARA ...
- Applicant: CHINOIN GYOGYSZER ÉS VEGYÉSZETI TERMÉKEK GYARA ... , ZOLTAN, Sándor , HIDASI, Cyörgy , BERTOK, Béla , SZÉKELY, István , HAJIMICHAEL, Janis , BOTAR, Sándor , NAGY, Lajos , SOMFAI, Éva , LAK, István , RAPI, András , GAJARY, Antal , HEGEDÜS, Agnes , TARY, Mária
- Assignee: CHINOIN GYOGYSZER ÉS VEGYÉSZETI TERMÉKEK GYARA ...,ZOLTAN, Sándor,HIDASI, Cyörgy,BERTOK, Béla,SZÉKELY, István,HAJIMICHAEL, Janis,BOTAR, Sándor,NAGY, Lajos,SOMFAI, Éva,LAK, István,RAPI, András,GAJARY, Antal,HEGEDÜS, Agnes,TARY, Mária
- Current Assignee: CHINOIN GYOGYSZER ÉS VEGYÉSZETI TERMÉKEK GYARA ...,ZOLTAN, Sándor,HIDASI, Cyörgy,BERTOK, Béla,SZÉKELY, István,HAJIMICHAEL, Janis,BOTAR, Sándor,NAGY, Lajos,SOMFAI, Éva,LAK, István,RAPI, András,GAJARY, Antal,HEGEDÜS, Agnes,TARY, Mária
- Priority: HU167/89 19890117; HU6780/89 19891227
- Main IPC: C07C255/14
- IPC: C07C255/14
Abstract:
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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