Potassium Carbonate → 2-Bromo-4-ethyl-1-(2-methoxy-ethoxy)-benzene

HRID 1453109Notes

Reaction equation

HRID 1453109 reaction equation
C(=O)([O-])[O-].[K+].[K+].[CH3:7][O:8][CH2:9][CH2:10]Br.[Br:12][C:13]1[CH:18]=[C:17]([CH2:19][CH3:20])[CH:16]=[CH:15][C:14]=1[OH:21]>CN(C=O)C>[Br:12][C:13]1[CH:18]=[C:17]([CH2:19][CH3:20])[CH:16]=[CH:15][C:14]=1[O:21][CH2:10][CH2:9][O:8][CH3:7]

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 809722-Bromoethyl methyl etherHCID 166412522-Bromo-4-ethylphenol

Product 1

HCID 587625842-Bromo-4-ethyl-1-(2-methoxy-ethoxy)-benzeneYield 90%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

Potassium carbonate (8.25 g, 60 mol) followed by 2-bromoethyl methyl ether (1.87 mL, 20 mmol) were added to a solution of 2-bromo-4-ethyl-phenol (4 g, 20 mmol, from step 1 of Example B(98)) in DMF (25 mL). The mixture was stirred for 20 hours and then partitioned between 1N HCl and EtOAc. The organic layers were washed with brine, dried over Na2SO4 and concentrated. The crude yellow oil was purified by flash column chromatography (0% to 10% EtOAc in hexanes) to give the desired product (4.63 g, 90%). 1H NMR (400 MHz, CDCl3): δ 1.20 (t, J=7.6 Hz, 3H), 2.57 (q, J=7.6 Hz, 2H), 3.48 (s, 3H), 3.79 (t, J=5.1 Hz, 2H), 4.15 (t, J=4.8 Hz, 2H), 0.6.85 (d, J=8.3 Hz, 1H), 7.06 (dd, J=8.3, 2.3 Hz, 1H), 7.37 (d, J=2.3 Hz, 1H).

Workup

  1. custompartitioned between 1N HCl and EtOAc
  2. washThe organic layers were washed with brine
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated
  5. customThe crude yellow oil was purified by flash column chromatography (0% to 10% EtOAc in hexanes)

Sources & evidence

ORD record
ord-f53b193be6c34fb2973a333fc87f4f49
Source dataset
uspto-grants-2009_01
Patent number
US07473790B2

Reaction notes

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