m-Chloroperbenzoic acid → HCID 18690749, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 1.57 g (0.005 mol) of 50-60% 3-chloroperbenzoic acid in 30 ml of dichloromethane is added dropwise at 0-5° C. to a solution of 1.7 g (0.005 mol) of 3-(4-chloro-2-fluoro-5-propargyloxyphenyl)-4-methyl-5-(methylthio)-1-methyl-[1H]-pyrazole (Example P12) in 20 ml of dichloromethane. After being stirred overnight at 22° C., the reaction mixture is washed with a dilute sodium hydrogen carbonate solution, then with water and concentrated by evaporation, and the resulting residue is recrystallised in petroleum ether/diethyl ether. 1.5 g (88.2% of the theoretical yield) of the desired compound are isolated in the form of crystals having a melting point of 93-96° C.

Provenance & Evidence