Potassium Carbonate → 2-(2-(3-trifluoromethylphenyl)-4-((4-fluoro-N-methylphenylsulfonamido)methyl)phenoxy)-2-methylpropanoic acid

関与物質

反応条件

反応手順

To a solution of N-(3-(3-trifluoromethylphenyl)-4-hydroxybenzyl)-4-fluoro-N-methylbenzenesulfonamide (36) (50.0 mg, 0.114 mmol, 1 eq) in DMF (3 mL) under argon, was added t-butyl-2-bromo-2-methylpropanoate (66.0 mg, 0.296 mmol, 2.6 eq) and potassium carbonate (31 mg, 0.224 mmol, 2 eq). The mixture was stirred at 80° C. for 16 h, cooled to room temperature and partitioned with saturated sodium bicarbonate and EtOAc. The organic layer was separated, dried (Na2SO4), and concentrated in vacuo. The crude residue was dissolved in TFA/DCM (1 mL/1 mL) and stirred at room temperature for 1 h. Solvent was removed in vacuo and the residue was purified via reversed phase semi-preparative HPLC to afford 2.8 mg of 2-(2-(3-trifluoromethylphenyl)-4-((4-fluoro-N-methylphenylsulfonamido)methyl)phenoxy)-2-methylpropanoic acid (Example 34). 1HNMR (CD3OD, 400 MHz): δ 7.91 (m, 3H), 7.88 (m, 1H), 7.61 (m, 2H), 7.35 (t, 2H), 7.27 (d, 2H), 6.90 (d, 1H), 4.20 (s, 2H), 2.67 (s, 3H), 1.46 (s, 6H). MS (ESI): MH+=526.1. HPLC (Method B) tR=2.53 min.

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