Potassium Carbonate → 1-(5-Aminopyridin-2-yl)piperidin-4-ol

반응식

Cl[C:2]1[CH:7]=[CH:6][C:5]([N+:8]([O-])=O)=[CH:4][N:3]=1.[NH:11]1[CH2:16][CH2:15][CH:14]([OH:17])[CH2:13][CH2:12]1.C([O-])([O-])=O.[K+].[K+]>CN(C=O)C>[NH2:8][C:5]1[CH:6]=[CH:7][C:2]([N:11]2[CH2:16][CH2:15][CH:14]([OH:17])[CH2:13][CH2:12]2)=[N:3][CH:4]=1

참가 물질

실험 절차

To a solution of 2-chloro-5-nitropyridine (LXV) (5.0 g, 31.5 mmol) in DMF (50 mL) was added piperidin-4-ol (LXXXIX) (3.5 g, 34.65 mmol) and K2CO3 (8.7 g, 63.0 mmol). The reaction was headed at 85° C. overnight. The solution was poured into ice water, stirred for 15 min and then filtered. The solid was washed with cold water and dried under vacuum to produce 1-(5-aminopyridin-2-yl)piperidin-4-ol (XC) as a yellow solid (6.62 g, 29.67 mmol, 94.2% yield). 1H NMR (DMSO-d6) δ ppm 1.34-1.42 (m, 2H), 1.77-1.83 (m, 2H), 3.40-3.56 (m, 2H), 3.76-3.83 (m, 1H), 4.12 (brd, 2H), 4.81 (d, J=4 Hz, 1H), 6.94 (d, J=10 Hz, 1H), 8.17 (dd, J=10 Hz, J=3 Hz, 1H), 8.94 (d, J=3 Hz, 1H); ESIMS found for C10H13N3O3 m/z 224.1 (M+H).