反应详情

温度

-78 °C

To a stirred solution of 1,1-dimethylethyl 6-fluoro-2,3-dihydro-1H-indole-1-carboxylate (8.7 g, 0.037 mol) in Et2O (150 mL) at −78° C. was added TMEDA (7.2 mL, 0.048 mol) and a solution of 1M sec-BuLi (44 mL, 0.044 mol) dropwise. The reaction mixture was stirred for 1 h at −78° C. and then poured onto crushed CO2 (250 mL). The mixture was allowed to warm to room temperature overnight. The suspension was diluted with water (200 mL) and diethyl ether (50 mL), and the layers were separated. The aqueous fraction was acidified with 1M HCl and extracted with diethyl ether (3×100 mL). The combined organic layers were washed with brine (1×50 mL), dried (Na2SO4), and concentrated under reduced pressure giving 8.0 g (77%) of the title compound.

1. additionpoured
2. temperatureto warm to room temperature overnight
3. customthe layers were separated
4. extractionextracted with diethyl ether (3×100 mL)
5. washThe combined organic layers were washed with brine (1×50 mL)
6. dry with materialdried (Na2SO4)
7. concentrationconcentrated under reduced pressure