反应详情

A solution of 6 g of N-tert-butoxycarbonyl-5-bromo-3-ethoxycarbonylmethylindole in 50 ml of tetrahydrofuran is added dropwise to a suspension, cooled to 0° C., of 0.9 g of LiAlH4 in 35 ml of tetrahydrofuran. After stirring for 20 hours at ambient temperature, the mixture is cooled to 0° C. and then treated in succession with 0.9 ml of water, 3.2 ml of an aqueous 20% sodium hydroxide solution and 3.6 ml of water. After filtration and concentration of the filtrate in vacuo, the residue is chromatographed on silica gel (dichloromethane/ethyl acetate: 90/10), enabling the expected product to be isolated.

1. temperaturethe mixture is cooled to 0° C.
2. filtrationAfter filtration and concentration of the filtrate in vacuo
3. customthe residue is chromatographed on silica gel (dichloromethane/ethyl acetate: 90/10)
4. customto be isolated