Nitric Acid → HCID 13557126, compound

Participants

Reaction Steps

1.03 ml (0.011 mol) of acetic anhydride and 0.56 ml (0.013 mol) of 98 percent strength nitric acid are added successively to 4.2 g (0.011 mol) of 5-chloroacetamido-1-(2,6-dichloro-4-trifluoromethyl-phenyl)-pyrazole in 20 ml of glacial acetic acid at 15° C. After stirring for 6 hours, the mixture is concentrated in vacuo, the residue is taken up in 100 ml of dichloromethane and washed successively with saturated sodium bicarbonate solution and saturated sodium chloride solution. The organic phase is dried over magnesium sulphate and freed of solvent in vacuo. 4.1 g (89% of theory) of 5-chloroacetamido-4-nitro-1-(2,6-dichloro-4-trifluoromethylphenyl)-pyrazole of melting point 130° C.-133° C. are obtained.

Provenance & Evidence