反应详情

To methyl 3-(3-(3-((4-formyl-6-methoxypyridin-3-yloxy)methyl)pyridin-2-yl)-1H-pyrazol-1-yl)propanoate (72 mg, 0.18 mmol, 1 eq.) in a mixture of MeOH/THF (1/6, 6.0 mL) was added NaOH (3 N, 0.6 mL, 1.8 mmol, 10 eq.). The mixture was stirred at rt for 2 h, acidified to pH 3, extracted with EtOAc (3×20 mL). The combined organic layers were dried over Na2SO4 and concentrated to give 3-(3-(3-((4-formyl-6-methoxypyridin-3-yloxy)methyl)pyridin-2-yl)-1H-pyrazol-1-yl)propanoic acid (53.4 mg, 78%) as a white solid. 1H NMR (400 MHz, CDCl3) δ 10.42 (s, 1H), 8.57 (d, J=4.6 Hz, 1H), 8.08 (s, 1H), 7.95 (d, J=7.8 Hz, 1H), 7.46 (d, J=2.3 Hz, 1H), 7.23 (dd, J=7.9, 4.6 Hz, 1H), 7.03 (s, 1H), 6.85 (d, J=2.3 Hz, 1H), 5.64 (s, 2H), 4.42 (t, J=6.1 Hz, 2H), 3.83 (s, 3H), 2.86 (t, J=6.1 Hz, 2H). LRMS (M+H+) m/z 383.1.

1. extractionextracted with EtOAc (3×20 mL)
2. dry with materialThe combined organic layers were dried over Na2SO4
3. concentrationconcentrated