反应详情

温度

90 °C

To a solution of (E)-ethyl 3-(4-bromo-2-nitrophenyl)-2-(cyanomethyl)acrylate (1.00 g, 2.9 mmol) in acetic acid (25 mL) was added iron powder (1.10 g, 19.0 mmol). The mixture was heated to 90° C. for 5 hours. Upon cooling the acetic acid was removed under vacuum and the resulting semisolid was dissolved in 50% K2CO3 (100 mL) and EtOAc (100 mL). The mixture was filtered to remove insoluble material and the phases were separated. The aqueous phase was extracted with EtOAc (2×100 mL). The combined organics were dried and concentrated. The concentrate was purified via flash chromatography (Biotage 40m, 5% MeOH/CH2Cl2) to yield (1E,4E)-ethyl 2-amino-8-bromo-3H-benzo[b]azepine-4-carboxylate (0.52 g, 57%).

1. customwas removed under vacuum
2. dissolutionthe resulting semisolid was dissolved in 50% K2CO3 (100 mL)
3. filtrationThe mixture was filtered
4. customto remove insoluble material
5. customthe phases were separated
6. extractionThe aqueous phase was extracted with EtOAc (2×100 mL)
7. customThe combined organics were dried
8. concentrationconcentrated
9. customThe concentrate was purified via flash chromatography (Biotage 40m, 5% MeOH/CH2Cl2)