反应详情

温度

5 °C

To a solution of benzo[b]thiophen-5-ol (1.39 g, 9.25 mmol) in tetrahydrofuran (50 mL) at 5° C. was added a 2 M solution of isopropylmagnesium chloride in tetrahydrofuran (5.0 mL, 10 mmol). The reaction mixture was stirred at 5° C. for 15 min and concentrated in vacuo. To the residue were added 1,2-dichloroethane (100 mL) and 1-(diphenylmethyl)-1H-indole-2,3-dione (2.5 g, 8.0 mmol). The reaction mixture was heated at reflux for 3 h, allowed to cool to ambient temperature and stirred for 48 h. Saturated aqueous ammonium chloride (10 mL) was added and the phases were separated. The organic phase was dried over magnesium sulfate, filtered and concentrated in vacuo. The residue was purified by column chromatography and eluted with a 0% to 20% gradient of ethyl acetate in dichloromethane to afford 1-(diphenylmethyl)-3-hydroxy-3-(5-hydroxy-1-benzothiophen-6-yl)-1,3-dihydro-2H-indol-2-one (2.2 g, 59%) as an off-white solid: MS (ES+) m/z 486.0 (M+23).

1. concentrationconcentrated in vacuo
2. temperatureThe reaction mixture was heated
3. temperatureat reflux for 3 h
4. temperatureto cool to ambient temperature
5. stirringstirred for 48 h
6. customthe phases were separated
7. dry with materialThe organic phase was dried over magnesium sulfate
8. filtrationfiltered
9. concentrationconcentrated in vacuo
10. customThe residue was purified by column chromatography
11. washeluted with a 0% to 20% gradient of ethyl acetate in dichloromethane