[CH2:1]([O:8][C:9]1[CH:16]=[CH:15][C:12]([C:13]#[N:14])=[C:11]([N+:17]([O-])=O)[C:10]=1[O:20][CH3:21])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[Cl-].[Na+].C(=O)(O)[O-].[Na+]>C(O)(=O)C.O.[Fe]>[NH2:17][C:11]1[C:10]([O:20][CH3:21])=[C:9]([O:8][CH2:1][C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=2)[CH:16]=[CH:15][C:12]=1[C:13]#[N:14]A degassed solution of 4-(benzyloxy)-3-methoxy-2-nitrobenzonitrile (185 g, 651 mmol) in glacial acetic acid (3500 mL) and water (10 mL) was cooled to 5° C. and treated with iron powder (182 g, 3.25 mol). After 3 days the reaction mixture was filtered through Celite, and the filtrate concentrated under reduced pressure. The oil, thus obtained, was treated with a saturated sodium chloride solution, neutralized with a sodium bicarbonate solution and extracted into CH2Cl2. The resulting emulsion was filtered through Celite after which the organic layer was separated, washed with a saturated sodium chloride solution, dried (anh. sodium sulfate) and concentrated under reduced pressure to afford 2-amino-4-(benzyloxy)-3-methoxybenzonitrile as a solid (145 g, 88%): 1H NMR (DMSO-d6) δ: 7.32-7.44 (5H, m), 7.15 (1H, d), 6.47 (1H, d), 5.69 (2H, s), 5.15 (2H, s), 3.68 (3H, s).
불러오는 중…
