m-Chloroperbenzoic acid → HCID 178510674, compound

Participants

Reaction Steps

To a solution of 15 g (35.5 mmol) of 1-(2,6-dichloro-4-trifluoromethylphenyl)-3-cyano-4-trifluoromethylsulfenyl-5-hydroxypyrazole in 125 ml of dichloromethane at room temperature was added a solution of m-chloroperbenzoic acid (8.76 g, 70%, 35.5 mmol) in 375 ml of dichloromethane. The resulting solution was stirred at room temperature for 17 hr. It was then concentrated and triturated with ethyl acetate and heptane(1:2). Upon filtration a solid was obtained. This solid was dissolved in ethyl acetate and stirred with saturated sodium bicarbonate solution. The layers were separated and the aqueous layer was extracted three times with ethyl acetate. The combined organic layer was dried (magnesium sulfate) and concentrated. Upon chromatographic purification via silica gel column, a solid (5.7 g, 13.01 mol, 37%) was obtained as the desired product, mp 185–187d.

Provenance & Evidence