Water → tert-Butyl ((5-bromo-1H-pyrrol-3-yl)methyl)(methyl)carbamate

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Reaction Steps

tert-Butyl{[5-bromo-1-(phenylsulfonyl)-1H-pyrrol-3-yl]methyl}methylcarbamate (1.0 g) was dissolved in a mixed solvent of tetrahydrofuran (15 mL) and methanol (5 mL), and 8 mol/L aqueous sodium hydroxide solution (1.5 mL) was added dropwise at not more than 10° C. After stirring at the same temperature for 4 hr, water was added to the residue and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by basic silica gel column chromatography (eluent:hexane-ethyl acetate=9:1→4:1) to give the title compound as a pale-yellow oil (yield 410 mg, 61%).

Provenance & Evidence