[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.
本发明揭示了一种制备多卤代全氟烷基苯胺的方法,特别适用于制备农药的反应中间体。该方法包括将无水单甲胺与3,4-二氯苯并三氟苯反应,在140-200°C的温度下用氯化物、磺酰氯和PCl5等卤化剂卤代所得的中间体,然后使用催化量的吡啶盐和干燥的HC1气体在180-190°C下去烷基化失活的苯胺,或者使用无水溴酸将其去烷基化,得到2,6-二氯-4-三氟甲基苯胺。