Lithium hydroxide, monohydrate → 2-(5-Chloro-4'-methyl-6-(2,2,2-trifluoroethoxy)biphenyl-3-yl)-3-cyclopropylpropanoic acid

A mixture of ethyl 2-(5-chloro-4′-methyl-6-(2,2,2-trifluoroethoxy)biphenyl-3-yl)-3-cyclopropylpropanoate (370 mg, 0.84 mmol) and lithium hydroxide monohydrate (282 mg, 6.7 mmol) in MeOH/THF/Water solvent mixture (10 ml/10 ml/10/ml) was stirred for 3 h at room temperature. After completion of the reaction, the volatiles were removed under reduced pressure. The residue was diluted with water, acidified with 5% HCl solution and extracted with ethyl acetate (2×25 mL). The combined organic layers were washed with water, dried with Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by Flash Column Chromatography to give 2-(5-chloro-4′-methyl-6-(2,2,2-trifluoroethoxy)biphenyl-3-yl)-3-cyclopropylpropanoic acid (200 mg) as a white solid. 1HNMR (CDCl3): 7.21-7.42 (m, 6H); 3.87 (q, 2H); 3.65 (t, 1H); 2.39 (s, 3H), 1.93 (m, 1H); 1.88 (m, 1H); 0.66 (m, 1H); 0.42 (m, 2H); 0.12 (m, 1H); 0.1 (m, 1H).