Azobisisobutyronitrile → 4-Bromomethylperfluorobiphenyl

HRID 1391859Notes

Reaction equation

HRID 1391859 reaction equation
[CH3:1][C:2]1[C:7]([F:8])=[C:6]([F:9])[C:5]([C:10]2[C:15]([F:16])=[C:14]([F:17])[C:13]([F:18])=[C:12]([F:19])[C:11]=2[F:20])=[C:4]([F:21])[C:3]=1[F:22].[Br:23]N1C(=O)CCC1=O.CC(N=NC(C#N)(C)C)(C#N)C>C(Cl)(Cl)(Cl)Cl>[Br:23][CH2:1][C:2]1[C:3]([F:22])=[C:4]([F:21])[C:5]([C:10]2[C:15]([F:16])=[C:14]([F:17])[C:13]([F:18])=[C:12]([F:19])[C:11]=2[F:20])=[C:6]([F:9])[C:7]=1[F:8]

Participants

5

Reactant 3

HCID 6547Azobisisobutyronitrile3×HCID 67184N-bromobutanimide3×HCID 587828944-Methylperfluorobiphenyl

Product 1

HCID 865911214-BromomethylperfluorobiphenylYield 60%

Reagents, catalysts & solvents 1

HCID 5943Carbon TetrachlorideSolvent

Procedure

A mixed solution of a mixture comprising the 4-methylperfluorobiphenyl mentioned above, an N-bromo succinic imide (NBS) (26.7 g, 150 mmol), AIBN (0.99 g, 6 mmol) and a carbon tetrachloride (100 mL) was subjected to heating under reflux for 1 week. During this process, the progress of the reaction was confirmed by TLC, and NBS and AIBN were added on a timely basis. Ultimately, 285 mmol NBS and 15 mmol AIBN were added to the solution. After the reaction was completed, the solution was cooled to room temperature, and the solvent was removed under reduced pressure. The crude product was purified by silica gel column chromatography (developing solvent: hexane-ethyl acetate=100:1), and the 4-(bromomethyl)perfluorobiphenyl (7.36 g, 18 mmol, total yield from methyl lithium 60%) was isolated. 1H NMR (CDCl3, 300 MHz) δ 4.58 (s, 2H, CH2Br); 19F NMR (CDCl3, 282 MHz) δ−138.02 (dd, J=10.6, 19.8 Hz, 2F), −138.56 (dt, J=9.1, 20.3 Hz, 2F), −142.36 (dd, J=10.6, 19.8 Hz, 2F), −150.59 (t, J=20.3 Hz, 1F), −161.08 (dt, J=7.1, 20.3 Hz, 2F).

Workup

  1. temperatureto heating
  2. temperatureunder reflux for 1 week
  3. additionwere added on a timely basis
  4. customthe solvent was removed under reduced pressure
  5. customThe crude product was purified by silica gel column chromatography (developing solvent: hexane-ethyl acetate=100:1)

Sources & evidence

ORD record
ord-b08486eec6644c59a47106afcc06c722
Source dataset
uspto-grants-2008_03
Patent number
US07339082B2

Reaction notes

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