申请人:Cheminova Agro A/S
公开号:US06215023B1
公开(公告)日:2001-04-10
Preparation of cyclopropane carboxylic acids usable as intermediates and of formula (II), wherein R1 represents halogen, preferably Cl or Br, or haloalkyl, preferably CF3, and X2 represents halogen, preferably Cl or Br, where R1 or X2 may be the same or different, and wherein the configuration of (II) is predominantly Z for R1=CF3 and X2=Cl; by reacting, in the presence of a catalyst, a compound of formula (I), wherein R1 and X2 are as defined, and X1 represents halogen, preferably Cl or Br, where R1, X1 and X2 may be the same or different, with a compound which is a hydrogen donor.
制备可用作中间体的环丙烷羧酸及其衍生物(II),其中R1代表卤素,优选为氯或溴,或卤代烷基,优选为三氟甲基,X2代表卤素,优选为氯或溴,其中R1或X2可以相同或不同,且在R1=CF3和X2=Cl的情况下,(II)的构型为主要为Z;通过在催化剂存在下将式(I)化合物与氢供体化合物反应来实现。其中,式(I)中,R1和X2的定义如上,X1代表卤素,优选为氯或溴,其中R1、X1和X2可以相同或不同。