反应详情

温度

50 °C

Add a solution of sodium hydroxide (296.7 g, 7.42 mol, 6 eq.) in water (454 mL) to a solution of ethyl 6-bromo-4-[[(2S)-2-methoxypropyl]amino]quinoline-3-carboxylate (454 g, 1.24 mol) in tetrahydrofuran (4.54 L) at room temperature. Heat the mixture at 50° C. overnight. After 18 hours, cool the reaction to 0° C., add 37% aq. HCl dropwise over 30 minutes until pH=6 (ca. 450 mL) with the temperature under 23° C. Filter the precipitate formed with filter paper and wash it with water (2 L), acetone (2 L) and methyl tert-butyl ether (2 L) subsequently. Dry the white solid to give the titled compound (359 g, 86%). MS (ESI) m/z (M+H)+338.9, 340.9.

1. temperaturecool
2. customthe reaction to 0° C.
3. filtrationFilter the precipitate
4. customformed
5. filtrationwith filter paper
6. washwash it with water (2 L), acetone (2 L) and methyl tert-butyl ether (2 L) subsequently
7. customDry the white solid