反应详情

温度

0 °C

Add tert-butyl lithium (27.07 ml, 46.03 mmol, 1.7 M in pentane) to a solution of 4-Bromo-1-[3-(tert-butyldimethylsilyloxy)propyl]-1H-indole (6.76 g, 18.41 mmol) in anhydrous tetrahydrofuran (100 ml) at −78° C. Stir the reaction at −78° C. for 30 min, quench with N,N-dimethylformamide (4.7 ml, 64.45 mmol), warm to 0° C., quench with pH7 buffer, and extract into ethyl acetate. Combine the organic layers, dry over magnesium sulfate, and concentrate under reduced pressure. Purification by flash chromatography and eluting with ethyl acetate:hexane gradient (100% hexane to 50% ethyl acetate:hexane over 45 minutes) gives the title compound, (4.81 g, 82%) as a clear oil. ESMS (M++1): 318.2 m/z.

1. customthe reaction at −78° C. for 30 min
2. customquench with pH7 buffer
3. extractionextract into ethyl acetate
4. dry with materialdry over magnesium sulfate
5. concentrationconcentrate under reduced pressure
6. customPurification by flash chromatography
7. washeluting with ethyl acetate