Hydrochloric Acid → 2-{[2-Chloro-4-(trifluoromethyl)phenyl]amino}-3-methylbutanoic acid

Participants

Reaction Conditions

Reaction Steps

A mixture of 10 parts of 3,4-dichlorobenzotrifluoride, 23 parts of potassium valinate and 60 parts of sulfolane was heated and maintained at about 160° C. for about 48 hours, with mixing. The mixture was then cooled to room temperature, diluted with water, acidified with hydrochloric acid to a pH of 1.0. The aqueous layer was extracted with diethyl ether. The ether layers were washed with water, then dried and concentrated by evaporation to yield 10.4 parts of 2-(2-chloro-4-trifluoromethylphenylamino)-3-methylbutanoic acid (85% purity); a yield of about 75% based on the dichlorobenzotrifluoride starting material.

Provenance & Evidence