Bromine → HCID 178506296, compound

HRID 2243255Notes

Reaction equation

HRID 2243255 reaction equation
[F:1][C:2]([F:9])([F:8])[C:3]1[CH:7]=[CH:6][NH:5][N:4]=1.[N+]([O-])([O-])=O.[NH4+].[Ce].[Ce].[Br:17]Br>C(#N)C>[Br:17][C:7]1[C:3]([C:2]([F:9])([F:8])[F:1])=[N:4][NH:5][CH:6]=1

Participants

5

Reactant 3

HCID 24408BromineHCID 18070343-(Trifluoromethyl)pyrazoleHCID 86617141Dicerium ammonium nitrate

Product 1

HCID 178506296HCID 178506296, compoundYield 169.9%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

An acetonitrile solution (20 ml) of 3-trifluoromethyl-1H-pyrazole (1.0 g), dicerium ammonium nitrate (2.0 g) and bromine (0.7 g) was refluxed for 2 hours. After cooling, the reaction solution was washed with saturated aqueous solution of sodium thiosulfate and saturated aqueous solution of sodium chloride. After drying the organic layer with magnesium sulfate, the solvent was distilled off under the reduced pressure to obtain 4-bromo-3-trifluoromethyl-1H-pyrazole (1.6 g).

Workup

  1. temperatureAfter cooling
  2. washthe reaction solution was washed with saturated aqueous solution of sodium thiosulfate and saturated aqueous solution of sodium chloride
  3. dry with materialAfter drying the organic layer with magnesium sulfate
  4. distillationthe solvent was distilled off under the reduced pressure

Sources & evidence

ORD record
ord-251bde832e324a3da1583f927b312d32
Source dataset
uspto-grants-2010_03
Patent number
US07674807B2

Reaction notes

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