Hydrochloric Acid → 3-(2-(4-Fluorophenyl)-3-(methylcarbamoyl)benzofuran-5-yl)-4-methylbenzoic acid

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Reaction Conditions

Reaction Steps

To a mixture of methyl 3-fluoro-5-(2-(4-fluorophenyl)-3-(methylcarbamoyl)benzofuran-5-yl)-4-methylbenzoate (0.3 g, 0.68 mmol, 1 eq) in a 1:1 mixture of MeOH/THF at ambient temperature was added 5 eq. of NaOH and heated to 60° C. for 5 h. The mixture was cooled to ambient temperature and then cooled in an ice-water bath. It was acidified slowly with 1.5 N HCl and then concentrated. The mixture with white precipitates was diluted with water and filtered to get the solid. It is further washed with water and dried in vacuum. Yield: 0.2 g (60%). 1H NMR (400 MHz, DMSO-d6): δ 2.22 (s, 3H), 2.82-2.84 (d, 3H, J=4.6 Hz), 7.39-7.43 (m, 3H,), 7.61 (s, 1H), 7.66-7.70 (d, 1H, J=8.6 Hz), 7.66-7.70 (m, 1H), 7.78-7.80 (d, 1H, J=8.5 Hz), 8.01-8.03 (m, 2H), 8.49-8.51 (d, 1H, J=4.76 Hz), 13.2 (s, 1H). LCMS: (ES−) m/z=420.0 (M−H) Chromolith SpeedROD C18 (4.6×3.0 mm-5 μm) Mphase A: 10% CH3OH-90% H2O-0.1% TFA Mphase B: 90% CH3OH-10% H2O-0.1% TFA.

Provenance & Evidence