Hydrochloric Acid → HCID 19024829, compound

Participants

Reaction Conditions

Reaction Steps

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 (38.8 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-butoxycarbonylamino] benzoyl]indol-1-yl]butyrate (155 mg) as an oil.

Provenance & Evidence