反应详情

温度

70 °C

To a solution of 2,4-dichloro-5-fluoro-pyrimidine (0.184 g, 1.100 mmol) and racemic ethyl 3-amino-3-(1-methylcyclopentyl)propanoate, 33a, (0.199 g, 1.000 mmol) in THF (10 mL) and ethanol (1 mL) was added triethylamine (0.307 mL, 2.200 mmol). The reaction mixture was stirred at 70° C. for 5 hours. The mixture was filtered and the filtrate was concentrated in vacuo. The resulting residue was purified via silica gel chromatography (25% EtOAc/Hexanes) to afford 180 mg of the desired product: 1H NMR (400 MHz, CDCl3) δ 7.88 (d, J=2.7 Hz, 1H), 5.54 (d, J=9.2 Hz, 1H), 4.74-4.54 (m, 1H), 4.08 (q, J=7.2 Hz, 2H), 2.68 (dd, J=14.8, 3.7 Hz, 1H), 2.46 (dd, J=14.8, 9.3 Hz, 1H), 1.69 (dd, J=12.8, 8.8 Hz, 4H), 1.63-1.50 (m, 2H), 1.46-1.38 (m, 1H), 1.37-1.23 (m, 1H), 1.23-1.14 (m, 3H), 1.00 (s, 3H). LCMS Gradient 10-90%, 0.1% formic acid, 5 minutes, C18/ACN, Retention Time=3.54 minutes (M+H) 330.17.

1. filtrationThe mixture was filtered
2. concentrationthe filtrate was concentrated in vacuo
3. customThe resulting residue was purified via silica gel chromatography (25% EtOAc/Hexanes)