[CH2:1]([O:8][CH2:9][CH2:10][O:11][C:12]1[CH:13]=[CH:14][C:15]([N+:19]([O-])=O)=[C:16]([CH3:18])[CH:17]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.N1CCC[CH2:23]1>C(OCC)(=O)C.CO.[Pd]>[CH2:1]([O:8][CH2:9][CH2:10][O:11][C:12]1[CH:17]=[C:16]2[C:15](=[CH:14][CH:13]=1)[NH:19][CH:23]=[CH:18]2)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=15(2-Benzyloxy-ethoxy)-2-nitro-toluene (12.4 g, 43.0 mmol), N-N-dimethylfomamide dimethyl acetal (6.55 g, 51.6 mmol) and pyrrolidine (3.68 g, 51.6 mmol) were dissolved in N-N-dimethylfomamide (25 mL). The mixture was heated to 120° C. for 16 h. The solvent was evaporated under vacuum and the crude reaction was dissolved in 70% ethyl acetate/methanol (250 mL). The reaction was placed in a Parr Hydrogenator under a hydrogen atmosphere for 16 h with 10% palladium on carbon [10% w/w] (3.00 g) at 50 psi. The reaction was filtrated over celite and the crude mixture was purified via column chromatography with silica gel eluting with hexane/ethyl acetate to give the title compound (22% yield). 1H NMR (CDCl3) δ 7.27–7.41 (m, 6H), 7.19 (t, 1H, J=2.5 Hz), 7.13 (d, 1H, J=2.3 Hz), 6.91 (dd, 1H, J=2.5, 8.8 Hz), 6.48 (m, 1H), 4.67 (s, 2H), 4.21 (m, 2H), 3.87 (m, 2H).
読み込み中…
