Hydrogen Peroxide → HCID 136352419, compound

Participants

Reaction Steps

30% Hydrogen peroxide solution (0.32 ml) was added to a solution of 1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-5-methyl-4-methylthio-1H-pyrazole-3-carboxaldehyde oxime (0.8 g) in trifluoroacetic acid at 20° C. The reaction solution was partitioned between water and dichloromethane and the organic layer dried (magnesium sulfate), evaporated and flash-chromatographed on silica gel, eluting with dichloromethane/ethyl acetate (3:1) to give 1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-5-methyl-4-methylsulfinyl-1H-pyrazole-3-carboxaldehyde oxime (0.29 g), m.p.210-214° C. Compound 30 and 1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-5-methyl-4-methylsulfonyl-1H-pyrazole-3-carboxaldehyde oxime (0.2 g), m.p.211-212° C. Compound 31.

Provenance & Evidence