[EN] AN EFFICIENT AND ENVIRONMENT FRIENDLY PROCESS FOR CHLOROMETHYLATION OF SUBSTITUTED BENZENES<br/>[FR] PROCÉDÉ EFFICACE ET RESPECTUEUX DE L'ENVIRONNEMENT POUR LA CHLOROMÉTHYLATION DE BENZÈNES SUBSTITUÉS
申请人:ANTHEA AROMATICS PRIVATE LTD
公开号:WO2020250018A1
公开(公告)日:2020-12-17
Disclosed herein is an efficient, environment friendly and commercially viable process for preparation of chloromethylated compound of formula I in substantially pure form and high yield, from the compound of formula II. The process includes contacting the compound of formula II with a chloromethylating agent generated in-situ by reaction of a formaldehyde precursor and hydrogen chloride, in a suitable solvent/contacting medium and in the presence of a catalytic amount of a short chain/low molecular weight carboxylic acid of formula III. I II III wherein, R1, R2, R3 and R4 are as defined in the description.
本文披露了一种高效、环保且具有商业可行性的方法,用于从式I化合物的II式化合物中制备高纯度和高产率的氯甲基化合物,该方法包括将II式化合物与由甲醛前体和氯化氢反应产生的氯甲基化试剂在适当的溶剂/接触介质中接触,并在III式短链/低分子量羧酸的催化量存在下进行。I II III其中,R1、R2、R3和R4如描述中所定义。