Ethanolamine → HCID 67136176, compound

Participants

Reaction Steps

To a solution of 4-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyloxy)-3-(2-[4-(3-hydroxypropoxy)phenyl]ethyl)benzofuran (0.23 g) and triethylamine (0.1 mL) in dichloromethane (6 mL) was added methanesulfonyl chloride (0.042 mL) under ice-cooling, and the mixture was stirred at room temperature for 2 hours. The reaction mixture was poured into 0.5 mol/L hydrochloric acid, and the resulting mixture was extracted with ethyl acetate. The extract was washed with water and brine, and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure to give 4-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyloxy)-3-(2-{(4-[3-(methanesulfonyloxy)propoxy]phenyl}ethyl)benzofuran (0.25 g). The obtained 4-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyloxy)-3-(2-{4-[3-(methanesulfonyloxy)propoxy]phenyl}ethyl)benzofuran (30 mg) was dissolved in acetonitrile (0.5 mL)-ethanol (0.5 mL). To the solution were added 2-aminoethanol (0.025 mL) and a catalytic amount of sodium iodide, and the mixture was stirred at 60° C. for 3 days. The reaction mixture was concentrated under reduced pressure, and the residue was dissolved in methanol (3 mL). To the solution was added sodium methoxide (28% methanol solution, 0.04 mL), and the mixture was stirred at room temperature for 1 hour. The reaction mixture was concentrated under reduced pressure, and the residue was purified by solid phase extraction on ODS (washing solvent: distilled water, eluent: methanol) to give the title compound (15 mg).

Provenance & Evidence