反应详情

温度

90 °C

Step 1 A mixture of methyl 2-amino-4-bromobenzoate (3.06 g, 13.3 mmol), 2-fluorophenylboronic acid (2.23 g, 16.0 mmol), tetrakis(triphenylphosphine)palladium (1.54 g, 1.33 mmol) and 1 M aqueous sodium carbonate (16.6 mL, 16.6 mmol) in 1,2-dimethoxyethane (66.5 mL) was stirred at 90° C. overnight. The mixture was cooled to rt, filtered through a pad of Celite and the solids were rinsed with EtOAc. The filtrate was washed with water and brine, dried and concentrated. The residue was purified by column chromatography (eluting with a gradient from hexane to 90:10 hexane-EtOAc) to provide methy 3-amino-2′-fluorobiphenyl-4-carboxylate (2.63 g, 81%) as a white solid. 1H NMR (400 MHz, chloroform-d) δ 7.90 (d, J=8.25 Hz, 1H), 7.38-7.46 (m, 1H), 7.27-7.35 (m, 1H), 7.08-7.22 (m, 2H), 6.85 (s, 1H), 6.82 (d, J=8.25 Hz, 1H), 5.83 (br s, 1H), 3.88 (s, 3H). Mass spectrum m/z 246.1 (M+H)+.

1. temperatureThe mixture was cooled to rt
2. filtrationfiltered through a pad of Celite
3. washthe solids were rinsed with EtOAc
4. washThe filtrate was washed with water and brine
5. customdried
6. concentrationconcentrated
7. customThe residue was purified by column chromatography (
8. washeluting with a gradient from hexane to 90:10 hexane-EtOAc)