Hydrochloric Acid → HCID 68741592, compound

Participants

Reaction Steps

To a solution of 3-(2,3,4,6-tetra-O-benzyl-β-D-glucopyranosyl)-7-methyl-1H-indole (1.18 g) in N,N-dimethylformamide (10 mL) was added 55% sodium hydride (87 mg) under ice-cooling, and the mixture was stirred at the same temperature for 15 minutes. To this mixture was added 4-iodobenzyl bromide (0.62 g) at the same temperature, and the mixture was stirred at the same temperature for 15 minutes, and stirred at room temperature for 1 hour. The reaction mixture was poured into 0.5 mol/L hydrochloric acid, and the resulting mixture was extracted with diethyl ether. The extract was washed with water and brine successively, and dried over anhydrous sodium sulfate. The solvent was removed under reduced pressure, and the residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=5/1-3/1) to give 3-(2,3,4,6-tetra-O-benzyl-β-D-glucopyranosyl)-1-(4-iodo-benzyl)-7-methyl-1H-indole (1.48 g). A mixture of 3-(2,3,4,6-tetra-O-benzyl-β-D-glucopyranosyl)-1-(4-iodobenzyl)-7-methyl-1H-indole (1.06 g), acrylic acid (0.18 g), palladium(II) acetate (14 mg), tris(2-methylphenyl)phosphine (37 mg), triethylamine (2 mL) and acetonitrile (2 mL) was stirred at 80° C. under an argon atmosphere overnight. The reaction mixture was diluted with diethyl ether, and the mixture was stirred at room temperature for 10 minutes. The insoluble material was removed by filtration, and the solvent was removed under reduced pressure. The residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=1/1-1/3) to give the title compound (0.85 g).

Provenance & Evidence