Bromoform → HCID 22618615, compound

Participants

Reaction Steps

Tertiary butyl nitrite (6.6 ml) was added at room temperature to a solution of 5-amino-3-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)-4-nitropyrazole (3.7 g), bromoform (13.3 ml) and acetonitrile (10 ml). The mixture was heated at 50°-60° C. for 4.5 hours and the solvents were evaporated to give an orange oil. This was purified by medium pressure liquid chromatography (eluant hexane/ether 2:1) to give 5-bromo-3-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)-4-nitropyrazole (3.4 g) as a solid, m.p. 147°-150° C.

Provenance & Evidence