Benzoyl Peroxide → tert-Butyl 4'-(bromomethyl)biphenyl-2-carboxylate

HRID 2255525Notes

Reaction equation

HRID 2255525 reaction equation
[C:1]([O:5][C:6]([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1[C:14]1[CH:19]=[CH:18][C:17]([CH3:20])=[CH:16][CH:15]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[Br:21]N1C(=O)CCC1=O.C(OOC(=O)C1C=CC=CC=1)(=O)C1C=CC=CC=1>C(Cl)(Cl)(Cl)Cl>[Br:21][CH2:20][C:17]1[CH:18]=[CH:19][C:14]([C:9]2[CH:10]=[CH:11][CH:12]=[CH:13][C:8]=2[C:6]([O:5][C:1]([CH3:4])([CH3:3])[CH3:2])=[O:7])=[CH:15][CH:16]=1

Participants

5

Reactant 3

HCID 7187Benzoyl PeroxideHCID 67184N-bromobutanimideHCID 9838270tert-Butyl 4'-methyl[1,1'-biphenyl]-2-carboxylate

Product 1

HCID 9906257tert-Butyl 4'-(bromomethyl)biphenyl-2-carboxylateYield 88%

Reagents, catalysts & solvents 1

HCID 5943Carbon TetrachlorideSolvent

Procedure

To a solution of 2-t-butoxycarbonyl-4'-methylbiphenyl (25.3 g, 95 mmol) in CCl4 (200 ml) were added freshly opened N-bromosuccinimide (17.6 g, 0.099 mole) and dibenzoyl peroxide (2.28 g, 0.0094 moles). the mixture was refluxed for 4 hours, cooled to room temperature and filtered. The filtrate was washed with sat. NaHSO3 (1×50 ml), sat. NaHCO3 (1×50 ml), water (1×50 ml), sat. NaCl (1×50 ml) and dried over MgSO4. The solution was filtered, and concentrated in vacuo. The residue was dissolved in 100 ml of hot hexane. Crystallization gradually took place as the solution cooled. The flask was finally cooled to -20° C. and the precipitate recovered by filtration. The solid was washed with ice cold hexanes and dried in vacuo to give 27 g (88%) of a white solid. 1H-NMR (CDCl3): 1.23 (s, 9H), 4.53 (s, 2H), 7.2-7.5 (m, 7H), 7.68 (d, 1H).

Workup

  1. temperaturethe mixture was refluxed for 4 hours
  2. filtrationfiltered
  3. washThe filtrate was washed with sat. NaHSO3 (1×50 ml), sat. NaHCO3 (1×50 ml), water (1×50 ml), sat. NaCl (1×50 ml)
  4. dry with materialdried over MgSO4
  5. filtrationThe solution was filtered
  6. concentrationconcentrated in vacuo
  7. dissolutionThe residue was dissolved in 100 ml of hot hexane
  8. customCrystallization gradually took place as the solution
  9. temperaturecooled
  10. temperatureThe flask was finally cooled to -20° C.
  11. filtrationthe precipitate recovered by filtration
  12. washThe solid was washed with ice cold hexanes
  13. customdried in vacuo

Sources & evidence

ORD record
ord-d723489a48dd40a88fb84d68b01f58fb
Source dataset
uspto-grants-1993_08
Patent number
US05240928

Reaction notes

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