Reaction #586137

Reaction equation

m-chloroperbenzoic acid

[2-difluoromethyl-5-(3-trifluoromethylpyrazolyl)phenyl] 2,2,2-trifluoroethyl sulfide

sodium sulfite

→

[2-difluoromethyl-5-(3-trifluoromethylpyrazolyl)phenyl] 2,2,2-trifluoroethyl sulfoxide

Yield 97.4%

Solvents

chloroform

chloroform

Conditions

Workup

1. 1
   workup.STIRRINGthe reaction solution was stirred for 1 hour
2. 2
   workup.STIRRINGstirred at room temperature for 10 minutes
3. 3
   WashThe chloroform layer was washed with 20 ml of saturated aqueous sodium hydrogen carbonate three times
4. 4
   Dryingdried over anhydrous magnesium sulfate
5. 5
   workup.DISTILLATIONthe chloroform was distilled off under reduced pressure

Procedure

To 0.37 g (1.0 mmol) of [2-difluoromethyl-5-(3-trifluoromethylpyrazolyl)phenyl] 2,2,2-trifluoroethyl sulfide (Compound No. V-295 of the present invention) in 5 ml of chloroform, 0.25 g (1.5 mmol) of m-chloroperbenzoic acid was added at 0° C. with stirring, and the reaction solution was stirred for 1 hour. The reaction solution was mixed with 10 ml of 10% aqueous sodium sulfite and stirred at room temperature for 10 minutes, and then 20 ml of chloroform was added. The chloroform layer was washed with 20 ml of saturated aqueous sodium hydrogen carbonate three times and dried over anhydrous magnesium sulfate, and the chloroform was distilled off under reduced pressure to obtain 0.38 g of [2-difluoromethyl-5-(3-trifluoromethylpyrazolyl)phenyl] 2,2,2-trifluoroethyl sulfoxide (yield 97.4%) as a yellow dough (nD2 1.4909).

Source