Hydrochloric Acid → 1-(piperidin-4-yl)-1H,2H,3H-imidazo[4,5-b]pyridin-2-one dihydrochloride

反応式

[O:1]=[C:2]1[NH:10][C:5]2=[N:6][CH:7]=[CH:8][CH:9]=[C:4]2[N:3]1[CH:11]1[CH2:16][CH2:15][N:14](C(OC(C)(C)C)=O)[CH2:13][CH2:12]1.[ClH:24]>CO.CCOCC>[ClH:24].[ClH:24].[O:1]=[C:2]1[NH:10][C:5]2=[N:6][CH:7]=[CH:8][CH:9]=[C:4]2[N:3]1[CH:11]1[CH2:16][CH2:15][NH:14][CH2:13][CH2:12]1

参加物

実験手順

2-Oxo-1-(1-t-butoxycarbonylpiperidin-4-yl)-2,3-dihydro-1H-imidazo[4,5-b]pyridine (1.03 g, 3.23 mmol) was dissolved in methanol (25 mL) and a solution of 2N hydrochloric acid in ether (8 mL) was added at room temperature. After 2 h, the volatiles were removed in vacuo, to give the title compound (0.92 g). MS 219 (M+1). 1H NMR (500 MHz, CD3OD) δ 8.01 (dd, J=1, 6 Hz, 1H), 7.83 (d, J=8 Hz, 1H), 7.28 (dd, J=6, 8 Hz, 1H), 4.60 (m, 1H), 3.59 (d, J=12 Hz, 2H), 3.21 (t, J=12 Hz, 2H), 2.70 (dq, J=4, 13 Hz, 2H), 2.12 (d, J=13 Hz, 2H).