[EN] PROCESS FOR SYNTHESIZING POLYHALOGENATED PERHALOALKYLANILINE COMPOUNDS<br/>[FR] PROCÉDÉ POUR LA SYNTHÈSE DE COMPOSÉS DE PERHALOALKYLANILINE POLYHALOGÉNÉE
申请人:GHARDA KEKI HORMUSJI
公开号:WO2011058577A1
公开(公告)日:2011-05-19
A process for preparing polyhalogenated perfluoroalkylanilines particularly useful as reaction intermediates for preparing agrochemicals is disclosed The process comprises reacting anhydrous monomethylamine with 3,4-dichlorobenzotπfluoπde at a temperature of 140-200 °C, halogenating the resultant intermediate with halogenating agents like chloride, sulfuryl chloride and PC15, and then dealkylating the deactivated aniline with catalytic quantity of pyridine salt and dry HC1 gas at 180-190 °C or with anhydrous hydrobromic acid to get 2,6-dichloro-4-trifluoromethylaniline.