Sodium bis(trimethylsilyl)amide → (E)-Ethyl 3-[2-(phenylcarbamoyl)ethenyl]-1-(2-trimethylsilylethoxymethyl)-4,6-dichloroindole-2-carboxylate

Participants

Reaction Steps

To a cooled (0°) solution of (E)-Ethyl-3-[2-(phenylcarbamoyl)ethenyl]-4,6-dichloroindole-2-carboxylate (300 mg) in dry DMF (25 ml) a solution of sodium bis-(trimethylsilyl)amide (1M;0.0814 ml) was added dropwise. The resulting mixture was stirred at room temperature for 30 minutes then cooled to 0°. Trimethylsilylethoxymethylchloride (185 mg) was added, and the reaction was stirred for one hour at room temperature. The resulting solution was poured in H2O (20 ml) and extracted with diethylether (15 ml×3). The organic layers were dried, concentrated under vacuum and the product isolated by chromatography on silica gel(CH/EA:83/15) to give the title compound (311 mg). Rf =0.35 CH/EA:85/15

Provenance & Evidence