Triethylamine → HCID 86614396, compound

Participants

Reaction Steps

A mixture of 1-(2-benzyloxyethyl)-4-bromo-3-(2,3,4,6-tetra-O-pivaloyl-β-D-glucopyranosyloxy)-1H-indazole (0.85 g), 1-benzyloxy-3-vinylbenzene (0.32 g), triethylamine (2 mL), palladium (II) acetate (11 mg) and tris(2-methylphenyl)-phosphine (30 mg) in acetonitrile (8 mL) was heated for reflux under an argon atmosphere overnight. The reaction mixture was cooled to room temperature and diluted with diethyl ether, and the resulting mixture was stirred for 30 minutes. The insoluble material was removed by filtration, and the filtrate was concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=4/1−3/1) to give 1-(2-benzyloxyethyl)-4-[(E)-2-(3-benzyloxyphenyl)vinyl]-3-(2,3,4,6-tetra-O-pivaloyl-β-D-glucopyranosyloxy)-1H-indazole (0.92 g). This material was dissolved in ethyl acetate (10 mL). To the solution was added 10% palladium-carbon powder (0.3 g), and the mixture was stirred at room temperature under a hydrogen atmosphere overnight. The insoluble material was removed by filtration, and the filtrate was concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=2/1−1/1) to give the title compound (0.68 g).

Provenance & Evidence