反应详情

温度

-78 °C

To 4.0 mL (7.04 g, 31.18 mmol) 4-bromo-1,2-dichloro-benzene in 100 mL THF at −78° C. is added 12.47 mL of a 2.5 M solution of n-BuLi in hexanes in drops over 5 min. After stirring at −78° C. for 45 min, 4.34 g (31.18 mmol) tropinone is added as a solid. The resulting mixture is warmed to 23° C. and stirred for 18 h. After pouring into 2.5 N NaOH, the reaction mixture is extracted with 2×100 mL EtOAc, the organics are combined and washed with 1×100 mL H2O, 1×100 mL brine, dried over MgSO4, filtered and evaporated to an off-white solid. Flash chromatography on SiO2 gel, eluting with CHCl3/MeOH (20/1 to 5/1), gives 2.58 g (9.02 mmol, a 28% yield) of the title compound as a white solid. mp: 153-154° C.; MS (ES) m/z 287 (MH)+.

1. temperatureThe resulting mixture is warmed to 23° C.
2. stirringstirred for 18 h
3. extractionthe reaction mixture is extracted with 2×100 mL EtOAc
4. washwashed with 1×100 mL H2O, 1×100 mL brine
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. customevaporated to an off-white solid
8. washFlash chromatography on SiO2 gel, eluting with CHCl3/MeOH (20/1 to 5/1)
9. customgives 2.58 g (9.02 mmol