Methylparaben → 4-(4-(Trifluoromethyl)phenoxy)benzoic acid

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4-(4-Trifluoromethyl-phenoxy)benzoic acid (474 mg, 80%) was prepared from 1-fluoro-4-trifluoromethyl benzene (328 mg, 2.0 mmol) and 4-hydroxy benzoic acid methyl ester (304 mg, 2.0 mmol) following general procedure B, then hydrolyzed following general procedure C to give the corresponding acid (450 mg, 80%). 3-(4′-Trifluoromethyl-biphenyl-4-yl)-(2S)-[4-(4-trifluoromethyl-phenoxy)-benzoylamino]-propionic acid methyl ester (121 mg, 82%) was prepared starting from the above acid (70 mg, 0.25 mmol) and 2-amino-3-(4′-trifluoromethyl-biphenyl-4-yl)-(2S)-propionic acid methyl ester (108 mg, 0.30 mmol) according to general procedure A. The ester was hydrolyzed following general procedure C to give the title compound (105 mg, 89%)

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