A process for the preparation of a high trans compound (as herein defined) of the general formula
or an alkali metal salt thereof, in which each Hal independently represents a chlorine or bromine atom, which comprises reacting a compound of the general formula
or an alkali metal salt thereof, in which each Hal independently represents a chlorine or bromine atom, with an alkali metal hydroxide, the reaction taking place in solution or suspension in an organic liquid phase having a dielectric constant of less than 10. The resulting compound is a useful intermediate in the synthesis of certain pyrethroid insecti- ' cides.
一种通式高反式化合物(如本文所定义)或其碱
金属盐的制备方法,其中每个 Hal 独立地代表
氯原子或
溴原子。
或其碱
金属盐(其中每个 Hal 独立地代表一个
氯原子或
溴原子)的制备方法,包括将通式为
或其碱
金属盐(其中每个 Hal 独立地代表一个
氯原子或
溴原子)与碱
金属氢氧化物反应,反应在介电常数小于 10 的有机液相中的溶液或悬浮液中进行。所得化合物是合成某些拟
除虫菊酯类杀虫剂的有用中间体。