반응 #1914831

반응 방정식

4-[(4-methoxyphenyl)methyl]-5-methyl-3-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyloxy)-1H-pyrazole

potassium carbonate

iodomethane

→

4-[(4-methoxyphenyl)methyl]-1,5-dimethyl-3-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyloxy)pyrazole

수율 21.7%

용매

acetonitrile

반응 조건

후처리

1. 1
   여과The reaction mixture was filtered through celite®
2. 2
   기타the solvent of the filtrate was removed under reduced pressure
3. 3
   기타The residue was purified by preparative thin layer chromatography (developing solvent: benzene/acetone=2/1)

실험 절차

A suspension of 4-[(4-methoxyphenyl)methyl]-5-methyl-3-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyloxy)-1H-pyrazole (18 mg), potassium carbonate (14 mg) and iodomethane (4.7 mg) in acetonitrile (2 mL) was stirred at 75° C. overnight. The reaction mixture was filtered through celite®, and the solvent of the filtrate was removed under reduced pressure. The residue was purified by preparative thin layer chromatography (developing solvent: benzene/acetone=2/1) to give 4-[(4-methoxyphenyl)methyl]-1,5-dimethyl-3-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyloxy)pyrazole (4 mg).

출처