Sodium Hydroxide → HCID 57802341, compound

Participants

Reaction Steps

To a suspension of 4-[(4-isobutylphenyl)methyl]-5-isopropyl-1,2-dihydro-3H-pyrazole-3-one (0.082 g), acetobromo-α-D-glucose (0.62 g) and benzyl(n-tributyl)ammonium bromide (0.054 g) in dichloromethane (3 mL) was added a sodium hydroxide aqueous solution (5 mol/L, 0.9 mL), and the mixture was stirred at room temperature overnight. The reaction mixture was purified by column chromatography on aminopropylated silica gel (eluent: tetrahydrofuran). The obtained semi purified 5-isopropyl-4-[(4-isobutylphenyl)methyl]-3-(2,3,4,6-tetraacetyl-β-D-gluco-pyranosyloxy)-1H-pyrazole was dissolved in methanol (5 mL), and sodium methoxide (28% methanol solution, 0.29 mL) was added to the solution. The mixture was stirred at room temperature for 2 hours. The solvent of the reaction mixture was removed under reduced pressure, and water was added to the residue. The mixture was purified by solid phase extraction (washing solvent: water, eluent: methanol). Further purification by column chromatography on silica gel (eluent: dichloromethane/methanol=20/1-7/1) gave the title compound (0.080 g).

Provenance & Evidence