反应详情

A solution of methyl-2-(1-methylcyclopropyl)quinoline-6-carboxylate (225 mg, 0.93 mmol) and 2M sodium hydroxide solution (2 ml, 4 mmol) in methanol (10 ml) was heated at 60° C. for 2 hours. After the solvent was evaporated in vacuo, the residue was dissolved with water. The aqueous solution was neutralized with 2M hydrochloric acid solution (2 ml) and the precipitate white solid was extracted with ethyl acetate (×3). The combined solution was washed with brine, dried over sodium sulfate and concentrated in vacuo to give crude white solid, which was recrystallized from ethyl acetate and hexane to furnish the title compound (177 mg, 84%) as a white solid. MS (ESI): m/z 228.15 [M+H]+, 226.13 [M−H]−.

1. customAfter the solvent was evaporated in vacuo
2. dissolutionthe residue was dissolved with water
3. extractionthe precipitate white solid was extracted with ethyl acetate (×3)
4. washThe combined solution was washed with brine
5. dry with materialdried over sodium sulfate
6. concentrationconcentrated in vacuo
7. customto give crude white solid, which
8. customwas recrystallized from ethyl acetate and hexane