反应详情

温度

40 °C

1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (0.092 g, 0.480 mmol) and 1-hydroxybenzotriazole monohydrate (0.073 g, 0.480 mmol) were added to a stirred solution of 6-(3-ethylureido)-4-(phenylamino)nicotinic acid, vi (0.100 g, 0.320 mmol) in DMF (3 mL) at room temperature. After 15 min, 3-chloroaniline (0.061 g, 0.480 mmol) was added and the reaction mixture stirred at 40° C. for 24 h. The mixture was cooled to room temperature, poured onto water and extracted with EtOAc (3×30 mL). The combined organic phase was washed successively with water (20 mL), saturated aqueous sodium bicarbonate (20 mL) and brine (2×20 mL), dried (MgSO4), and reduced in vacuo to give the crude product. This was triturated with EtOAc to afford Compound 4 (0.021 g, 0.051 mmol, 16%) as a colourless powder. 1H NMR (300 MHz, DMSO-d6): δ 10.44 (1H, s), 9.83 (1H, s), 9.16 (1H, s), 8.58 (1H, s), 7.96-7.90 (2H, m), 7.63 (1H, d, J 8.2), 7.45-7.36 (3H, m), 7.32-7.27 (3H, m), 7.20-7.13 (2H, m), 3.15 (2H, dq, J 7.2 and 6.1), 1.07 (311, t, J 7.2); [M+H]+ m/z=410.1

1. temperatureThe mixture was cooled to room temperature
2. additionpoured onto water
3. extractionextracted with EtOAc (3×30 mL)
4. washThe combined organic phase was washed successively with water (20 mL), saturated aqueous sodium bicarbonate (20 mL) and brine (2×20 mL)
5. dry with materialdried (MgSO4)
6. customto give the crude product
7. customThis was triturated with EtOAc