Carbon tetrabromide → HCID 20076910, compound

HRID 1654769Notes

Reaction equation

HRID 1654769 reaction equation
[C:1]([Br:5])(Br)(Br)[Br:2].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[NH:25]1[CH:29]=[CH:28][N:27]=[C:26]1[CH:30]=O>C(Cl)Cl>[Br:2][C:1]([Br:5])=[CH:30][C:26]1[NH:25][CH:29]=[CH:28][N:27]=1

Participants

5

Reactant 3

HCID 11205Carbon tetrabromideHCID 11776TriphenylphosphineHCID 249551H-imidazole-2-carbaldehyde

Product 1

HCID 20076910HCID 20076910, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent3×

Conditions

Temperature
0 °C

Procedure

Mix carbon tetrabromide (49.8 g, 150 mmol) and methylene chloride (75 mL) and cool to 0° C. Add, by dropwise addition, a solution of triphenylphosphine (78.6 g, 300 mmol) in methylene chloride (75 mL). Stir at 0° C. for 30 minutes. Add, by dropwise addition, a solution of 2-imidazolecarboxaldehyde (7.57 g, 78.8 mmol) in methylene chloride (75 mL). Remove the cooling bath and stir at room temperature until the reaction is complete. Pour onto ethyl ether and water, separate the organic layer and dry (MgO4). Filter and evaporate the solvent in vacuo. Purify by silica gel chromatography to yield the title compound.

Workup

  1. additionAdd, by dropwise addition
  2. additionAdd, by dropwise addition
  3. customRemove the cooling bath
  4. stirringstir at room temperature until the reaction
  5. additionPour onto ethyl ether and water
  6. customseparate the organic layer
  7. customdry (MgO4)
  8. filtrationFilter
  9. customevaporate the solvent in vacuo
  10. customPurify by silica gel chromatography

Sources & evidence

ORD record
ord-91889ad73b3844179e2a58ea06048878
Source dataset
uspto-grants-1995_04
Patent number
US05409942

Reaction notes

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