Process for preparing 2-trifluoromethoxy-aniline

Details Process for preparing 2-trifluoromethoxy-aniline Process for preparing 2-trifluoromethoxy-aniline

C - Chemistry, Metallurgy

07

C

C07C 217/84 (2006.01) C07C 201/08 (2006.01) C07C 205/37 (2006.01) C07C 209/36 (2006.01) C07C 213/02 (2006.01)

Patent

CA 2211133

2-Trifluoromethoxy-aniline, which can be used as an intermediate for example for preparing pharmaceuticals and agrochemicals, is obtained in very good yields and high purity by nitrating in a first step 1,2-dichloro-4-trifluoromethoxy-benzene at temperatures between -20°C and +80°C and catalytically hydrogenating the resulting nitration products (exclusively 1,2-dichloro-5-nitro-4-trifluoromethoxy- benzene and 1,2-dichloro-3-nitro-4-trifluoromethoxy-benzene) in a 2nd step, it being possible to isolate the aniline intermediates corresponding to the two nitrobenzene derivatives; the nitrobenzene and aniline derivatives mentioned, being novel compounds, are also part of the subject matter of the invention.

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