反应详情

温度

0 °C

A solution of ethyl 4-[3-[3,5-bis[tertbutoxycarbonylamino)benzoyl]indol-1-yl]butyrate (300 mg) in N,N-dimethylformamide (5 ml) was added to a suspension of sodium hydride (60% dispersion in mineral oil, 54 mg) in N,N-dimethylformamide (5 ml) at 0° C. The mixture was stirred at 0° C. for 30 minutes, and a solution of 4-isobutylbenzyl chloride (388 mg) in N,N-dimethylformamide (5 ml) was added at 0° C. The reaction mixture was stirred at 0° C. for 3 hours, and poured into a mixture of 0.1N hydrochloric acid and ethyl acetate. The organic layer was separated, washed with water, aqueous solution of sodium bicarbonate and brine in successively. After dryness over magnesium sulfate and evaporation of the solvent, the residue was chromatographed on silica gel (25 g) eluting with a mixture of ethyl acetate and hexane (1:4) to give ethyl 4-[3-[3,5-bis[N-(4-isobutylbenzyl)-N-tert-butoxycarbonyl- amino]benzoyl]indol-1-yl]butyrate (155 mg) as an oil.

1. stirringThe reaction mixture was stirred at 0° C. for 3 hours
2. customThe organic layer was separated
3. washwashed with water, aqueous solution of sodium bicarbonate and brine in successively
4. customAfter dryness over magnesium sulfate and evaporation of the solvent
5. customthe residue was chromatographed on silica gel (25 g)
6. washeluting with a mixture of ethyl acetate and hexane (1:4)