反应详情

温度

25 °C

A solution of 2-[4-(2,6-difluoro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-3-(tetrahydro-pyran-4-yl)-propionic acid (155 mg, 0.42 mmol) in dichloromethane (10 mL) was treated with bromotripyrrolidinophosphonium hexafluorophosphate (240 mg, 0.051 mmol), N,N-diisopropylethylamine (165 mg, 0.127 mmol) and 6-aminonicotinic acid methyl ester (80 mg, 0.51 mmol). The reaction mixture was stirred at 25° C. for 18 h under nitrogen. The reaction mixture was diluted with dichloromethane, washed with 2N aqueous hydrochloric acid, saturated sodium bicarbonate solution, a saturated sodium chloride solution and dried over magnesium sulfate. The organic layer was concentrated, and the crude product was purified by ISCO flash chromatography (Teledyne Isco RediSep Flash Column 12 g; 0% to 100% ethyl acetate/hexanes) to afford 6-[2-[4-(2,6-difluoro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-3-(tetrahydro-pyran-4-yl)-propionylamino]-nicotinic acid methyl ester (110 mg, 55%), as an off-white solid: LR-ES-MS m/z calculated for C25H25F2N3O6 [M]+ 501, observed [M+H]+ 502; 1H NMR (300 MHz, DMSO-d6) δ ppm 1.20-1.95 (m, 7H) 3.11-3.32 (m, 2H) 3.70-3.92 (m, 2H) 3.86 (s, 3H) 4.37 (d, J=18.1 Hz, 1H) 4.64 (d, J=18.1 Hz, 1H) 4.98-5.12 (m, 2H) 7.30-7.51 (m, 3H) 8.13-8.20 (m, 1H) 8.28 (dd, J=8.8, 2.4 Hz, 1H) 8.87 (d, J=2.4 Hz, 1H) 11.33 (s, 1H).

1. washwashed with 2N aqueous hydrochloric acid, saturated sodium bicarbonate solution
2. dry with materiala saturated sodium chloride solution and dried over magnesium sulfate
3. concentrationThe organic layer was concentrated
4. customthe crude product was purified by ISCO flash chromatography (Teledyne Isco RediSep Flash Column 12 g; 0% to 100% ethyl acetate/hexanes)