反应详情

温度

80 °C

Methyl 2-(2-methoxyethoxy)pyridine-4-carboxylate (562 mg, 2.66 mmol), dioxane (6 mL) and NaOH (7.1 mL of 1 M, 7.1 mmol) were combined and the mixture was heated at 80° C. for 50 min. The solvent was evaporated under reduced pressure and the residue was dissolved in water before it was washed with EtOAc (3×). The aqueous layer was acidified with 1N HCl and was washed with EtOAc (3×). The combined organic layers were dried over Na2SO4, filtered and the solvent was evaporated under reduced pressure to yield 242-methoxyethoxy)pyridine-4-carboxylic acid (457 mg, 87%) as a white solid. ESI-MS m/z calc. 197.2, found 198.3 (M+1)+; Retention time: 0.66 minutes (3 min run); 1H NMR (400 MHz, DMSO) δ 13.64 (s, 1H), 8.32 (d, J=5.2 Hz, 1H), 7.39 (d, J=5.2 Hz, 1H), 7.18 (s, 1H), 4.51-4.27 (m, 2H), 3.78-3.54 (m, 2H), 3.30 (s, 3H).

1. customThe solvent was evaporated under reduced pressure
2. dissolutionthe residue was dissolved in water before it
3. washwas washed with EtOAc (3×)
4. washwas washed with EtOAc (3×)
5. dry with materialThe combined organic layers were dried over Na2SO4
6. filtrationfiltered
7. customthe solvent was evaporated under reduced pressure