Methanol → HCID 66974400, compound

Participants

Reaction Conditions

Reaction Steps

tert-Butyl methyl{[5-(4-methylpyridin-3-yl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl]methyl}carbamate (230 mg) was dissolved in methanol (20 mL), a 4 mol/L hydrogen chloride-ethyl acetate solution (2 mL) was added and the mixture was stirred at 70° C. for 20 min. The reaction mixture was concentrated under reduced pressure, a saturated aqueous sodium hydrogencarbonate solution was added, and the mixture was extracted with ethyl acetate. The obtained organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by basic silica gel column chromatography (eluent: ethyl acetate-methanol (99:1→95:5) to give a free salt of the title compound. This was dissolved in ethyl acetate (8 mL), a solution of fumaric acid (90 mg) in methanol (2 mL) was added, and the obtained crystals were collected by filtration to give the title compound as colorless crystals (yield 115 mg, 48%).

Provenance & Evidence