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    • 5. 发明申请
    • A PROCESS FOR THE PRODUCTION OF 1R PYRETHROID ESTERS
    • 一种生产1R吡咯烷酮的方法
    • WO2003053905A1
    • 2003-07-03
    • PCT/GB2002/005467
    • 2002-12-04
    • SYNGENTA LIMITEDBROWN, Stephen, MartinGOTT, Brian, David
    • BROWN, Stephen, MartinGOTT, Brian, David
    • C07C67/00
    • C07C255/39A01N53/00C07B2200/07C07B2200/09C07C51/02C07C51/04C07C51/412C07C51/43C07C51/60C07C61/40C07C67/14C07C69/743
    • A process for the production of 1R pyrethroid esters of formula (IIIA) or (IIIB), wherein A and B are independently chlorine or bromine or one of A or B is chlorine and the other is trifluoromethyl and R is a pyrethroid alcohol fragment, which process comprises a) resolving pyrethroid acids of formula (IV) where A and B are as defined for compounds of formula (IIIA) and (IIIB) to give a substantially pur 1R cis enantiomer, b) recovering the 1S cis enantiomer, c) optionally converting the 1S cis enantiomer acid to a 1S cis enantiomer anhydride, acid chloride or pyrethroid ester containing the group R where R is a pyrethroid alcohol fragment; d) converting the 1S cis enantiomer from step b) or step c) to the 1R trans isomer; e) optionally purifying the 1R trans isomer from step d) and recycle of the unconverted 1S cis isomer back to step c) or d), f) converting the 1R cis isomer of the acid from step a) into corresponding 1R cis isomers of the pyrethroid esters alone, or together with the product of step d) or e) where the product of step d) or e) is not already a pyrethroid ester containing the group R.
    • 制备式(IIIA)或(IIIB)的1R拟除虫菊酯的方法,其中A和B独立地是氯或溴或A或B中的一个是氯,另一个是三氟甲基,R是拟除虫菊酯醇片段,其中 方法包括a)拆分式(IV)的拟除虫菊酯酸,其中A和B如式(IIIA)和(IIIB)化合物所定义,得到基本上为1R的顺式对映体,b)回收1S顺式对映体,c)任选地 将1S顺式对映异构体酸转化为含有R基团的1S顺式对映体酸酐,酰氯或拟除虫菊酯,其中R为拟除虫菊酯醇片段; d)将来自步骤b)或步骤c)的1S顺式对映异构体转化为1R反式异构体; e)任选地将步骤d)中的1R反式异构体纯化并将未转化的1S顺式异构体再循环回到步骤c)或d),f)将来自步骤a)的酸的1R顺式异构体转化成相应的1R顺式异构体 或与步骤d)或e)的产物一起使用,其中步骤d)或e)的产物不是含有R基团的拟除虫菊酯。