申请人:Central Glass Company, Limited
公开号:US05600036A1
公开(公告)日:1997-02-04
2-Trifluoromethyl-4-chloro-benzalchloride and 2-methyl-3-nitro-5-chlorobenzotrifluoride, are intermediates in a process of preparing 2-methyl-3-aminobenzo-trifluoride. In this process, 2-trifluoromethyl-4-chlorobenzal-chloride is prepared by chlorinating o-trifluoromethylbenzalhalide, and 2-methyl-3-nitro-5-chlorobenzotrifluoride is prepared at first by hydrogenating the 2-trifluoro-methyl-4-chlorobenzalhalide to form a 2-methyl-5-monochlorobenzotrifluoride and then by nitrating the 2-methyl-5-monochlorobenzotrifluoride. Following this process, 2-methyl-3-aminobenzotrifluoride (MA-BTF) is prepared by hydrogenating the 2-methyl-3-nitro-5-chlorobenzotrifluoride. The thus prepared 2-methyl-3-aminobenzotrifluoride is useful as an intermediate in preparing medicines, agricultural chemicals and other chemical products.
2-三氟甲基-4-氯苯甲酰氯和2-甲基-3-硝基-5-氯苯三氟甲基醚是制备2-甲基-3-氨基苯三氟甲基的过程中的中间体。在这个过程中,通过氯化o-三氟甲基苯甲酰卤化物制备2-三氟甲基-4-氯苯甲酰氯,首先通过氢化2-三氟甲基-4-氯苯甲酰卤化物形成2-甲基-5-单氯苯三氟甲基醚,然后通过硝化2-甲基-5-单氯苯三氟甲基醚制备2-甲基-3-硝基-5-氯苯三氟甲基醚。在此过程后,通过氢化2-甲基-3-硝基-5-氯苯三氟甲基醚制备2-甲基-3-氨基苯三氟甲基(MA-BTF)。因此制备的2-甲基-3-氨基苯三氟甲基作为制备药品、农药和其他化学产品的中间体是有用的。