Benzoyl Peroxide → Methyl 2-(bromomethyl)-3-nitrobenzoate

HRID 2118420Notes

Reaction equation

HRID 2118420 reaction equation
[CH3:1][C:2]1[C:11]([N+:12]([O-:14])=[O:13])=[CH:10][CH:9]=[CH:8][C:3]=1[C:4]([O:6][CH3:7])=[O:5].[Br:15]N1C(=O)CCC1=O.C(OOC(=O)C1C=CC=CC=1)(=O)C1C=CC=CC=1>C(Cl)(Cl)(Cl)Cl.C(OOC(=O)C1C=CC=CC=1)(=O)C1C=CC=CC=1>[Br:15][CH2:1][C:2]1[C:11]([N+:12]([O-:14])=[O:13])=[CH:10][CH:9]=[CH:8][C:3]=1[C:4]([O:6][CH3:7])=[O:5]

Participants

6

Reactant 3

HCID 7187Benzoyl PeroxideHCID 67184N-bromobutanimideHCID 601165Methyl 2-methyl-3-nitrobenzoate

Product 1

HCID 1487795Methyl 2-(bromomethyl)-3-nitrobenzoateYield 52.7%

Reagents, catalysts & solvents 2

HCID 7187Benzoyl PeroxideCatalystHCID 5943Carbon TetrachlorideSolvent

Procedure

To a suspension of 100 g of 2-methyl-3-nitrobenzoic acid, methyl ester and 100 g of N-bromosuccinimide in 1000 ml carbon tetrachloride was added 3 g of benzoyl peroxide and the mixture was stirred at reflux temperature for about 24 hours. Additional benzoyl peroxide was then added and refluxing was resumed for another 24 hours. The reaction mixture was cooled, filtered, and the filtrate concentrated in vacuo to afford an oil which crystallized upon cooling. This crude product was dissolved in diethyl ether and the organic layer was washed with saturated aqueous sodium sulfite (one 500-ml portion), water (two 500-ml portions), 2.5% aqueous sodium hydroxide solution (one 500-ml portion), water and brine. Drying and evaporation of the organic layer in vacuo gave a yellow oil which crystallized on standing. Recrystallization from 350 ml n-butyl chloride/cyclohexane (2:1) gave 74 g of 2-(bromomethyl)-3-nitrobenzoic acid, methyl ester, m.p. 67°-70°.

Workup

  1. temperatureat reflux temperature for about 24 hours
  2. temperaturerefluxing
  3. temperatureThe reaction mixture was cooled
  4. filtrationfiltered
  5. concentrationthe filtrate concentrated in vacuo
  6. customto afford an oil which
  7. customcrystallized
  8. temperatureupon cooling
  9. dissolutionThis crude product was dissolved in diethyl ether
  10. washthe organic layer was washed with saturated aqueous sodium sulfite (one 500-ml portion), water (two 500-ml portions), 2.5% aqueous sodium hydroxide solution (one 500-ml portion), water and brine
  11. customDrying
  12. customevaporation of the organic layer in vacuo
  13. customgave a yellow oil which
  14. customcrystallized
  15. customRecrystallization from 350 ml n-butyl chloride/cyclohexane (2:1)

Sources & evidence

ORD record
ord-ebf5713016154a00aa20c9d64912d089
Source dataset
uspto-grants-1987_07
Patent number
US04678500

Reaction notes

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