反应详情

Combine a mixture of an oil dispersion of KH (40%, 1 g) in 30 mL anhydrous THF and a suspension of 2-(2-(5-benzyloxy-1H-indol-3-yl)ethyl)isoindole-1,3-dione (1.2 g, 3 mmol) in 30 mL THF portionwise. Stir for 1 hour at ambient temperature, cooled to 0° C., add triisopropylsilyltrifluoromethanesulfonate (1.85 g, 6 mmol) and stir an additional 1 hour at ambient temperature. Pour the reaction into a rapidly stirring solution of saturated NaHCO3 and extract with 2×50 mL EtOAc. Combine the organic layer, dry over MgSO4 and concentrate to dryness and chromatograph on silica gel eluting with 1% MeOH in CHCl3 to give 2-(2-(5-benzyloxy-1-triisopropylsilanyl-1H-indol-3-yl)ethyl)isoindole-1,3-dione as an oil.

1. temperaturecooled to 0° C.
2. stirringstir an additional 1 hour at ambient temperature
3. additionPour
4. extractionextract with 2×50 mL EtOAc
5. dry with materialdry over MgSO4
6. concentrationconcentrate to dryness and chromatograph on silica gel eluting with 1% MeOH in CHCl3