Bromine → HCID 178419283, compound

Participants

Reaction Steps

At 25° C, 8 parts of bromine is slowly added, with stirring, to a solution of 12.6 parts of 3-phenyl-5-phenylthiopyrazole in 150 parts of glacial acetic acid. After 12 hours, the solution is concentrated in vacuo and the residue treated with about 50 parts of water. There is obtained 16 parts (96.7% of theory) of 3-phenyl-4-bromo-5-phenylthiopyrazole; m.p.: 121° to 122° C (recrystallized from cyclohexane).

Provenance & Evidence