Water → 1-tert-butyl-5-methoxy-3-trifluoromethyl-1H-pyrazole

Participants

Reaction Steps

15.0 g (108.4 mmoles) of anhydrous potassium carbonate and 19.3 g (135.5 mmoles) of methyl iodide were added, at room temperature, to a solution of 18.8 g (90.3 mmoles) of 1-tert-butyl-3-trifluoromethyl-1H-pyrazol-5-ol dissolved in 100 ml of N,N-dimethylformamide. The mixture was stirred for 15 hours to give rise to a reaction. After the completion of the reaction, the reaction mixture was poured into water, followed by extraction with diethyl ether. The resulting organic layer was washed with water and an aqueous sodium chloride solution in this order and then dried over anhydrous magnesium sulfate. The resulting solution was subjected to vacuum distillation to remove the solvent contained therein, to obtain 20.0 g (yield: 99.8%) of 1-tert-butyl-5-methoxy-3-trifluoromethyl-1H-pyrazole.

Provenance & Evidence