2,5-Dichlorobenzoic acid → 5-Chloro-2-[2-methyl-3-(trifluoromethyl)anilino]benzoic acid

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Reaction Steps

To a solution of 25 g. of 2,5-dichlorobenzoic acid in 125 ml. of n-pentyl alcohol add 4.8 g. of sodium hydroxide pellets, 25 g. of 2-methyl-3-trifluoromethylaniline and 2 g. of copper powder. With constant stirring, reflux the reaction mixture for 18 hours. Concentrate the mixture to one half volume and dilute with water and ether. Acidify the aqueous layer to yield the product which is recrystallized from methanol, m.p. 220°-222° C.

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