HCID 14300256, compound → HCID 14300252, compound

Participants

Reaction Steps

3.05 G (0.007 mol) of 5-amino-4-ethoxycarbonyl-3-trifluoromethyl-1-(2,6-dichloro-4-trifluoromethylphenyl)pyrazole in 14 ml of concentrated sulphuric acid are heated at 75° C. for 5 hours. After the mixture has been cooled to room temperature, it is diluted with ice-water and filtered with suction. 2.45 g (86% of theory) of 5-amino-4-hydroxycarbonyl-3-trifluoromethyl-1-(2,6-dichloro-4-trifluoromethylphenyl)pyrazole of melting point 191° C.-195° C. (decomposition) are obtained.

Provenance & Evidence