Water → 4-[(4-isopropoxyphenyl)methyl]-1-isopropyl-5-methyl-3-(6-O-propionyl-beta-D-glucopyranosyloxy)pyrazole

Participants

Reaction Steps

To a solution of 3-(β-D-glucopyranosyloxy)-4-[(4-iso-propoxyphenyl)methyl]-1-isopropyl-5-methylpyrazole (0.10 g) in 2,4,6-trimethylpyridine (1 mL) was added propionyl chloride (0.072 g) at 0° C., and the mixture was stirred for hours. To the reaction mixture were added citric acid monohydrate (3.3 g) and water, and the resulting mixture was purified by ODS solid phase extraction (washing solvent: distilled water, eluent: methanol). Further purification by column chromatography on silica gel (eluent: dichloromethane/methanol=10/1) afforded 4-[(4-isopropoxyphenyl)methyl]-1-isopropyl-5-methyl-3-(6-O-propionyl-β-D-glucopyranosyloxy)pyrazole (0.074 g)

Provenance & Evidence