N-bromobutanimide → HCID 10160605, compound

Participants

Reaction Steps

A mixture of 5-amino-1-(2,6-dichloro-4-trifluoromethylphenyl)-3-trifluoromethylpyrazole (3.64 g) and N-bromosuccinimide (1.78 g) in carbon tetrachloride (30 ml) was stirred and heated under reflux for 1 hour. Further N-bromosuccinimide (0.89 g) was added, and reflux was continued for a further 1 hour. The mixture was cooled, filtered, and the filtrate was evaporated in vacuo to give an orange solid. Recrystallization from petroleum ether gave 5-amino-4-bromo-1-(2,6-dichloro-4-trifluoromethylphenyl)-3-trifluoromethylpyrazole in the form of white crystals (2.6 g) m.p. 119-120° C.

Provenance & Evidence