Hydrazine hydrate (1:1) → HCID 14032813, compound

Participants

Reaction Conditions

Reaction Steps

2.5 ml (0.065 mole) of hydrazine hydrate are added to 10 g (0.02 mole) of 5-bromo-1-(2,6-dichloro-4-trifluoromethyl-phenyl)-4-trifluoromethylsulphonyl-pyrazole in 140 ml of dioxane at room temperature and the mixture is warmed at 60° C. with stirring for 4 hours. For work-up, the solvent is removed in vacuo and the oil remaining is purified by chromatography (silica gel, eluent: dichloromethane). 6.5 g (72% of theory) of 1-(2,6-dichloro-4-trifluoromethyl-phenyl)-5-hydrazino-4-trifluoromethylsulphonyl-pyrazole of melting point 154° C. are obtained.

Provenance & Evidence