Trifluoroacetic acid → Methyl 2-(2-pyrrolidinyl)methoxypyridine-5-carboxylate
反応式
C(OC([N:8]1[CH2:12][CH2:11][CH2:10][CH:9]1[CH2:13][O:14][C:15]1[CH:20]=[CH:19][C:18]([C:21]([O:23][CH3:24])=[O:22])=[CH:17][N:16]=1)=O)(C)(C)C.C(O)(C(F)(F)F)=O>C(Cl)Cl>[NH:8]1[CH2:12][CH2:11][CH2:10][CH:9]1[CH2:13][O:14][C:15]1[CH:20]=[CH:19][C:18]([C:21]([O:23][CH3:24])=[O:22])=[CH:17][N:16]=1参加物
4
実験手順
To a stirred solution of methyl 2-[[1-(tert-butoxycarbonyl)-2-pyrrolidinyl]methoxy]pyridine-5-carboxylate (262.5 mg, 0.870 mmol) in CH2Cl2 (5.3 mL) was added TFA (1.1 mL) at 0° C., and the resulting mixture was stirred at room temp for 1 hr. The solvent was removed under a reduced pressure and the residue was made basic by the addition of the 1N NaOH, and extracted with CHCl3. The extract was washed with brine, dried over Na2SO4, and concentrated under a reduced pressure to afford 173.1 mg (94%) methyl 2-[(2-pyrrolidinyl)methoxy]pyridine-5-carboxylate as a pale yellowish oil. 1H-NMR (400 MHz, CDCl3) δ1.49-1.58 (ddt, J=6.8, 8.8 Hz, 1H), 1.72-1.87 (m, 2H), 1.90-1.99 (m, 1H), 2.92-3.05 (m, 2H), 3.50-3.57 (ddd, J=4.4, 7.3, 15.1 Hz, 1H), 3.91 (s, 3H), 4.23 (dd, J=7.8, 10.7 Hz, 1H), 4.38 (dd, J=4.4, 10.7 Hz, 1H), 6.78 (d, J=8.8 Hz, 1H), 8.15 (dd, J 2.4, 8.8 Hz, 1H), 8.80 (d, J=2.4 Hz, 1H); MS (FAB) m/z 237 (M+1).