反应详情

To a suspension of sodium hydride (60%, in oil, 0.51 g) in N,N-dimethylformamide (15 ml) was slowly added ethyl 7-nitro-1H-indole-2-carboxylate (2.50 g) at 0° C., and the mixture was stirred for 30 min. Chloromethyl methyl ether (1.00 ml) was added to the reaction mixture over 20 min at 0° C., and the mixture was stirred at room temperature for 1 hr. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, dried (MgSO4), and concentrated. The obtained residue was subjected to silica gel column chromatography to give the title compound (2.29 g, yield 77%) as pale-yellow crystals from a fraction eluted with ethyl acetate-hexane (1:3, volume ratio). melting point 62-63° C.

1. customat 0° C.
2. stirringthe mixture was stirred at room temperature for 1 hr
3. extractionthe mixture was extracted with ethyl acetate
4. washThe ethyl acetate layer was washed with saturated brine
5. dry with materialdried (MgSO4)
6. concentrationconcentrated