反应详情

温度

60 °C

A suspension of ethyl 6-(6-(3-ethylureido)pyridin-3-yl)-1-(2-methoxyethyl)-4-oxo-1,4-dihydroquinoline-3-carboxylate (Example 42, 59 mg, 0.13 mmol) and sodium hydroxide (0.202 mL, 0.40 mmol) in tetrahydrofuran (1 mL) was heated to 60° C. After 2 h, the reaction was not yet complete. Ethanol (2 mL) was added and the reaction was heated for another 1 h, then cooled to room temperature and concentrated under reduced pressure. The resulting solid was dissolved in water and acidified to pH 4 with 10% HCl. The solid that formed was collected by filtration and placed under high vacuum to remove residual water. MS (ESP): 411 (M+H+) for C21H22N4O5; NMR: 1.11 (t, J=6 Hz, 3H), 3.20 (m, 2H), 3.23 (s, 3H), 3.74 (m, 2H), 4.83 (m, 2H), 7.50 (m, 1H), 8.01 (br s, 1H), 8.21 (m, 1H), 8.31 (m, 1H), 8.58 (m, 1H), 8.69 (m, 1H), 8.94 (s, 1H), 9.38 (s, 1H), 15.20 (s, 1H).

1. temperaturethe reaction was heated for another 1 h
2. temperaturecooled to room temperature
3. concentrationconcentrated under reduced pressure
4. dissolutionThe resulting solid was dissolved in water
5. customThe solid that formed
6. filtrationwas collected by filtration
7. customto remove residual water