Dimethylformamide → 1-[3-(tert-Butyldimethylsilyloxy)propyl]-1H-indole-4-carboxaldehyde

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Add tert-butyl lithium (27.07 ml, 46.03 mmol, 1.7 M in pentane) to a solution of 4-Bromo-1-[3-(tert-butyldimethyl-silyloxy)prop-1-yl]-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 pH=7 buffer, and extract into ethyl acetate. Combine the organic layers, dry over magnesium sulfate, and concentrate under reduced pressure. Purification by flash chromatography, eluting with ethyl acetate:hexane gradient (100% hexane to 50% ethyl acetate:hexane over 45 minutes) gives the title compound as a clear oil.

Herkunft & Nachweise