[CH3:1][O:2][CH2:3][CH2:4][O:5][C:6]1[C:7]([N+:19]([O-])=O)=[N:8][CH:9]=[C:10]([O:12][C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)[CH:11]=1.O>C(O)(=O)C.[Zn]>[CH3:1][O:2][CH2:3][CH2:4][O:5][C:6]1[C:7]([NH2:19])=[N:8][CH:9]=[C:10]([O:12][C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)[CH:11]=13-(2-Methoxy-ethoxy)-2-nitro-5-phenoxy-pyridine (0.4 mmol) is dissolved in acetic acid (1.3 ml). After addition of water (1.3 ml), zinc powder (6 eq.) is added and the reaction suspension is heated to 100° C. for 3 h. The reaction suspension is cooled to room temperature and filtrated. The filtrate is pored into 3.5% NaOH (30 ml) and extracted with dichloromethane. The combined organic layers are extracted with brine, dried over MgSO4 and the solvent is removed in vacuo. 3-(2-Methoxyethoxy)-5-phenoxy-pyridine-2-ylamine is obtained as brown oil in a yield of 76%. HPLC (method C): 1.43 min; LC-MS (method A): 0.808 min, 261.15 (M+H+).
불러오는 중…
