Potassium Carbonate → 1-[3-(Tert-butyldimethylsilyloxy)propoxy]-5-methylpyrazole-3-carboxylic acid ethyl ester

Participants

Reaction Conditions

Reaction Steps

To a solution of 1.96 g of 5-methylpyrazole-3-carboxylic acid ethyl ester in 40 ml of DMF, 2.64 g of potassium carbonate and 3.53 ml of 3-(tert-butyldimethylsilyloxy)propylbromide were added, and the mixture was stirred at 50° C. for 18 hours. The solvent was evaporated, EtOAc was added to the residue, and the organic layer was washed with water and brine and dried over sodium sulfate. After the evaporation of the solvent, the obtained residue was purified by silica gel column chromatography (eluent: hexane-EtOAc=15:1˜5:1) to obtain 1.39 g of 1-[3-(tert-butyldimethylsilyloxy)propoxy]-5-methylpyrazole-3-carboxylic acid ethyl ester.

Provenance & Evidence