Preparation of 5-(2-halo-4-trifluoromethylphenoxy)-2-...

Details Preparation of 5-(2-halo-4-trifluoromethylphenoxy)-2-... Preparation of 5-(2-halo-4-trifluoromethylphenoxy)-2-...

C - Chemistry, Metallurgy

07

C

260/474.2, 260/5

C07C 205/59 (2006.01)

Patent

CA 1181763

Abstract of the disclosure A process for preparing a substantially pure, isomer free 5-(2-halo-4-trifluoromethylphenoxy)-2- nitrobenzoic acid or its esters, salts and amides by the basic condensation of a 4-trifluoromethylphenol and a l-chloro-3-substituted-4-nitrobenzene followed by halogenation. All known previous routes afforded, in addition to the desired product, a number of inactive isomers.

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