反应详情

温度

80 °C

Ethyl 1,2,3,4,5,6-hexahydroazepino[4,5-b]indole-5-carboxylate (1.29 g, 5 mmol; European Patent No. EP 064 317 B1) and methylamine hydrochloride (0.67 g, 10 mmol) were added to a solution of methylamine in THF (2 M, 15 mL) and the suspension was heated to 80° C. in a sealed tube under nitrogen stirring for 72 hours. Solvent was evaporated to give a crude product, which was purified by chromatography on silica gel eluting with MeOH-DCM (1:9 to 1:4) to give the title compound (0.8 g); 1H-NMR (CDCl3): δ 8.46 (1H, br s), 8.24 (1 H, s), 7.48 (1H, d)), 7.30 (1H, d), 7.16 (1H, m), 7.10 (1H, m), 3.70 (1H, d), 3.66 (1H, dd), 3.46 (1H, dd), 3.08 (2H, m), 2.87 (2H, m), 2.73 (3H, d), 1.9 (1H, br s); MS (ES): 244 (MH+).

1. customSolvent was evaporated
2. customto give a crude product, which
3. customwas purified by chromatography on silica gel eluting with MeOH-DCM (1:9 to 1:4)