N-bromobutanimide → HCID 20728732, compound

HRID 1352832Notes

Reaction equation

HRID 1352832 reaction equation
[CH3:1][C:2]1[CH:3]=[C:4]([C:18]([O:20][CH3:21])=[O:19])[C:5]([C:8]2[CH:13]=[CH:12][CH:11]=[C:10]([C:14]([O:16][CH3:17])=[O:15])[CH:9]=2)=[CH:6][CH:7]=1.C1C(=O)N([Br:29])C(=O)C1>C(Cl)(Cl)(Cl)Cl.C(OOC(=O)C1C=CC=CC=1)(=O)C1C=CC=CC=1>[Br:29][CH2:1][C:2]1[CH:3]=[C:4]([C:18]([O:20][CH3:21])=[O:19])[C:5]([C:8]2[CH:13]=[CH:12][CH:11]=[C:10]([C:14]([O:16][CH3:17])=[O:15])[CH:9]=2)=[CH:6][CH:7]=1

Participants

5

Reactant 2

HCID 67184N-bromobutanimideHCID 20728723HCID 20728723, compound

Product 1

HCID 20728732HCID 20728732, compoundYield 60%

Reagents, catalysts & solvents 2

HCID 7187Benzoyl PeroxideCatalystHCID 5943Carbon TetrachlorideSolvent

Procedure

To a solution of 4-methyl-[1,1′-biphenyl]-2,3′-dicarboxylic acid, dimethyl ester (2.26 g, 7.9 mmol) in CCl4 (50 mL) were added benzoyl peroxide (0.010 g, 0.04 mmol) and NBS (1.42 g, 8.0 mmol), and the mixture was refluxed for 3 days. The reaction mixture was allowed to cool to room temperature, filtered, and concentrated. The residue was purified by column chromatography (95:5 to 90:10 hexanes/EtOAc) to afford 4-bromomethyl-[1,1′-biphenyl]-2,3′-dicarboxylic acid, dimethyl ester (1.71 g, 60%): 1H NMR (DMSO-d6) δ 3.61(s, 3H), 3.88 (s, 3H), 4.84 (s, 2H), 7.48-7.50 (d, J=8.0 Hz, 1H), 7.59-7.60 (m, 2H), 7.72-7.75 (m, 1H), 7.85 (s, 1H), 7.90 (m, 1H), 7.97-7.99 (m, 1H).

Workup

  1. temperaturethe mixture was refluxed for 3 days
  2. filtrationfiltered
  3. concentrationconcentrated
  4. customThe residue was purified by column chromatography (95:5 to 90:10 hexanes/EtOAc)

Sources & evidence

ORD record
ord-7425b242af404ec59eb7019237ceb411
Source dataset
uspto-grants-2007_05
Patent number
US07220780B2

Reaction notes

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