反应详情

To a solution of {4-[2-(toluene-4-sulfonylamino)-4-trifluoromethyl-phenoxy]-phenyl}-acetic acid methyl ester (97 mg, 0.202 mmol) in 1 mL of methanol was added 1 mL of a suspension of lithium hydroxide (42 mg, 1.01 mmol) in 1 mL of water. The resulting mixture was allowed to stir at room temperature until all starting material disappeared. Upon completion, 50 mL of 1N aqueous HCl was added and the resulting mixture was extracted with ethyl acetate (3×30 mL). The combined extracts were washed with 1N HCl aqueous solution (20 mL), water and brine, dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified by column chromatography to give 70 mg of {4-[2-(toluene-4-sulfonyl-amino)-4-trifluoromethyl-phenoxy]-phenyl}-acetic acid (1). 1H NMR (CD3OD): δ 7.84 (d, J=1.92 Hz, 1H), 7.58 (d, J=8.27, 1.6 Hz, 2H), 7.32 (dd, J=8.27, 1.6 Hz, 1H), 7.18-7.30 (m, 5H), 6.73 (d, J=8.53 Hz, 1H), 6.57 (d, J=8.53 Hz, 2H), 3.59 (s, 2H), 2.37 (s, 3H). LCMS (ESI−) 464 (M−1).

1. extractionthe resulting mixture was extracted with ethyl acetate (3×30 mL)
2. washThe combined extracts were washed with 1N HCl aqueous solution (20 mL), water and brine
3. dry with materialdried over anhydrous sodium sulfate
4. concentrationconcentrated in vacuo
5. customThe residue was purified by column chromatography