反应详情

温度

120 °C

5(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).

1. customThe solvent was evaporated under vacuum
2. customthe crude reaction
3. filtrationThe reaction was filtrated over celite
4. customthe crude mixture was purified via column chromatography with silica gel eluting with hexane/ethyl acetate