alpha-D-Glucopyranosyl bromide, tetraacetate → 4-[(4-Ethylphenyl)methyl]-5-methyl-3-(2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyloxy)-1H-pyrazole

Participants

Reaction Conditions

Reaction Steps

To a suspension of 4-[(4-ethylphenyl)methyl]-5-methyl-1,2-dihydro-3H-pyrazol-3-one (0.65 g) and acetobromo-α-D-glucose (1.2 g) in tetrahydrofuran (15 mL) was added silver carbonate (0.83 g), and the mixture was stirred at 60° C. overnight under light shielding. The reaction mixture was purified by column chromatography on aminopropyl silica gel (eluent: tetrahydrofuran), and successively by column chromatography on silica gel (eluent: hexane/ethyl acetate=1/3) to give 4-[(4-ethylphenyl)methyl]-5-methyl-3-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyloxy)-1H-pyrazole (0.61 g).

Provenance & Evidence