| abstract |
The invention discloses a method used for preparing pretilachlor. The method comprises a step used for preparing pretilachlor. According to the method, ethylene glycol monopropyl ether is reacted with thionyl chloride so as to obtain chloric ether; chloric ether and aniline are subjected to condensation reaction so as to obtain a condensation product; the condensation product is subjected to rectification so as to obtain rectified N,N,N',N'-tetramethyl-2,2'-oxybis(ethylamine); and rectified N,N,N',N'-tetramethyl-2,2'-oxybis(ethylamine) is subjected to acylation so as to obtain pretilachlor. The method is capable of increasing production efficiency, reducing production cost, improving production environment, and increasing yield of pretilachlor obviously. |