반응 #1755494

반응 방정식

Water

1,2-dihydro-4-[(4-methylthiophenyl)-methyl]-5-trifluoromethyl-3H-pyrazol-3-one

acetobromo-α-D-glucose

potassium carbonate

→

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

수율 46.6%

용매

acetonitrile

반응 조건

후처리

1. 1
   추출the resulting mixture was extracted with ethyl acetate
2. 2
   세척The organic layer was washed with a saturated aqueous sodium hydrogen carbonate solution and brine
3. 3
   건조dried over anhydrous magnesium sulfate
4. 4
   기타The solvent was removed under reduced pressure
5. 5
   기타the residue was purified by column chromatography on silica gel (eluent: hexane/ethyl acetate 1/1)

실험 절차

To a solution of 1,2-dihydro-4-[(4-methylthiophenyl)-methyl]-5-trifluoromethyl-3H-pyrazol-3-one (2.0 g) in acetonitrile (100 mL) were added acetobromo-α-D-glucose (3.1 g) and potassium carbonate (1.1 g), and the mixture was stirred at room temperature overnight. Water was added to the reaction mixture, and the resulting mixture was extracted with ethyl acetate. The organic layer was washed with a saturated aqueous sodium hydrogen carbonate solution and brine and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure, and the residue was purified by column chromatography on silica gel (eluent: hexane/ethyl acetate 1/1) to give 4-[(4-methylthiophenyl)methyl]-3-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyloxy)-5-trifluoromethyl-1H-pyrazole (2.0 g).

출처