Methylamine → tert-butyl{[1-(6-chloro-5-methyl-3-pyridinesulfonyl)-5-phenyl-1H-pyrrol-3-yl]methyl}methylcarbamate

1-[(6-Chloro-5-methylpyridin-3-yl)sulfonyl]-5-phenyl-1H-pyrrole-3-carbaldehyde (244 mg) was dissolved in absolute tetrahydrofuran (6.8 mL), a 2 mol/L solution (0.34 mL) of methylamine in tetrahydrofuran was added, and the mixture was stirred at room temperature for 4 hr. The reaction mixture was added to a solution of sodium borohydride (51 mg) in methanol (3 mL), and the mixture was stirred at the same temperature for 3 min. di-tert-Butyl bicarbonate (654 mg) was added, and water (5 mL) and sodium hydrogencarbonate (420 mg) were added 3 min later. The mixture was further stirred at room temperature for 30 min, water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: hexane-ethyl acetate=19:1→3:1) to give the title compound as an oil (yield 247 mg, 77%).

1. additionwas added
2. stirringThe mixture was further stirred at room temperature for 30 min
3. extractionthe mixture was extracted with ethyl acetate
4. washThe extract was washed with saturated brine
5. dry with materialdried over anhydrous magnesium sulfate
6. customthe solvent was evaporated under reduced pressure
7. customThe residue was purified by silica gel column chromatography (eluent: hexane-ethyl acetate=19:1→3:1)

ORDレコード

ord-c8b714c5b2304a0782207d0db2cb17a0

出典データセット

uspto-grants-2011_11

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08048909B2