申请人:American Cyanamid Company
公开号:US04108904A1
公开(公告)日:1978-08-22
This is a novel process for the preparation of m-phenoxybenzaldehyde, a useful and valuable intermediate for the synthesis of pyrethroid type pesticides. The process comprises halogenation of m-phenoxytoluene on the side chain, in an inert solvent and in the presence of free radical initiators or strong light to a mixture of the corresponding mono and dihalo derivatives, and conversion of the mixture to m-phenoxybenzaldehyde by a Sommelet-type reaction.
这是一种制备m-苯氧基苯甲醛的新工艺,它是合成拟除虫菊酯类农药的有用和宝贵的中间体。该工艺包括在惰性溶剂中,在侧链上对m-苯氧基甲苯进行卤代反应,同时存在自由基引发剂或强光,制备相应的单卤和双卤衍生物混合物,然后通过Sommelet型反应将混合物转化为m-苯氧基苯甲醛。