Iodoethane → Ethyl 3-(bromophenyl)acetate

HRID 2298168Notes

Reaction equation

HRID 2298168 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([CH2:8][C:9]([OH:11])=[O:10])[CH:5]=[CH:6][CH:7]=1.C([O-])([O-])=O.[K+].[K+].[CH2:18](I)[CH3:19]>CC#N>[CH2:18]([O:10][C:9](=[O:11])[CH2:8][C:4]1[CH:5]=[CH:6][CH:7]=[C:2]([Br:1])[CH:3]=1)[CH3:19]

Participants

5

Reactant 3

HCID 6340IodoethaneHCID 11430Potassium CarbonateHCID 74653(3-Bromophenyl)acetic acid

Product 1

HCID 11470552Ethyl 3-(bromophenyl)acetateYield 82.3%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

To a solution of 3-bromophenylacetic Acid (10.0 g, 46.5 mmol) in CH3CN (150 mL) was added K2CO3 (7.39 g, 53.5 mmol) followed by ethyl iodide (5.6 mL, 70.0 mmol). The mixture was heated at reflux for 2.5 h and was cooled to room temperature. The volatiles were removed in vacuo and water was added. The aqueous solution was extracted with EtOAc (3×) and the combined organic extracts were washed with brine. The organic solution was dried (MgSO4), filtered, and concentrated to provide (3-bromo-phenyl)-acetic Acid ethyl ester (9.30 g) as an oil. 1H NMR (400 MHz, CDCl3) δ 7.43 (s, 1H), 7.38 (m, 1H), 7.21-7.16 (m, 2H), 4.14 (q, 2H), 3.56 (s, 2H), 1.24 (t, 3H).

Workup

  1. temperatureThe mixture was heated
  2. temperatureat reflux for 2.5 h
  3. customThe volatiles were removed in vacuo and water
  4. additionwas added
  5. extractionThe aqueous solution was extracted with EtOAc (3×)
  6. washthe combined organic extracts were washed with brine
  7. dry with materialThe organic solution was dried (MgSO4)
  8. filtrationfiltered
  9. concentrationconcentrated

Sources & evidence

ORD record
ord-f8b7ead7473442b79a394f91f3c2f6fb
Source dataset
uspto-grants-2002_12
Patent number
US06492412B2

Reaction notes

Loading…