Methyl iodide → 1-Bromo-4-methoxy-2-methyl-3-nitrobenzene

HRID 550167Notes

Reaction equation

HRID 550167 reaction equation
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([OH:8])=[C:4]([N+:9]([O-:11])=[O:10])[C:3]=1[CH3:12].[C:13](=O)([O-])[O-].[K+].[K+].CI>CC(C)=O>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([O:8][CH3:13])=[C:4]([N+:9]([O-:11])=[O:10])[C:3]=1[CH3:12]

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 130881794-Bromo-3-methyl-2-nitrophenol

Product 1

HCID 113570121-Bromo-4-methoxy-2-methyl-3-nitrobenzene

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

To a solution of 4-bromo-3-methyl-2-nitrophenol (2.200 g, 9.48 mmol) in acetone (35 mL) was added potassium carbonate (3.276 g, 23.70 mmol) and methyl iodide (1.47 mL, 23.70 mmol) and the.mixture was heated to reflux for 4 h. The reaction was cooled to rt, filtered and the filtrate was evaporated under reduced pressure to afford the crude product. Purification of the crude product by column chromatography over silica gel eluting with EtOAc/hexane afforded pure 1-bromo-4-methoxy-2-methyl-3-nitrobenzene as pale yellow solid. 1H NMR (400 MHz, CDCl3) δ=2.33 (s, 2H), 3.87 (s, 3H), 6.78 (d, J=8.84 Hz, 1H) and 7.58 (d, J=8.84 Hz, 1H); MS (ES+): m/z 247.26 [MH+].

Workup

  1. temperaturewas heated
  2. temperatureto reflux for 4 h
  3. filtrationfiltered
  4. customthe filtrate was evaporated under reduced pressure

Sources & evidence

ORD record
ord-e020b72d19d3415bb63a45a8179c3265
Source dataset
uspto-grants-2011_05
Patent number
US07943767B2

Reaction notes

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