申请人:Imperial Chemical Industries, plc
公开号:US04555575A1
公开(公告)日:1985-11-26
A liquid phase process for preparing 2,3-dichloro-5-trichloromethylpyridine, said process consisting essentially of contacting a 2,3-disubstituted-5-methylpyridine of formula ##STR1## where X and Y are halogen atoms selected from bromine and chlorine, in a dry inert organic liquid medium under the influence of UV light, whereby the methyl group of the substituted methyl pyridine (1) is trichlorinated to give 2,3-dichloro-5-trichloromethylpyridine.
一种制备2,3-二氯-5-三氯甲基吡啶的液相工艺,其基本包括在无水惰性有机液体介质中,在紫外光的作用下接触式公式为##STR1##的2,3-二取代-5-甲基吡啶,其中X和Y是从溴和氯中选择的卤素原子,使得取代甲基吡啶(1)的甲基基团三氯化,从而得到2,3-二氯-5-三氯甲基吡啶。