Butyl bromide → Butyl 4-bromo-3-(butyloxy)benzoate

HRID 2098893Notes

Reaction equation

HRID 2098893 reaction equation
[Br:1][C:2]1[CH:10]=[CH:9][C:5]([C:6]([OH:8])=[O:7])=[CH:4][C:3]=1[OH:11].C(=O)([O-])[O-].[Cs+].[Cs+].Br[CH2:19][CH2:20][CH2:21][CH3:22]>CN(C=O)C.O>[Br:1][C:2]1[CH:10]=[CH:9][C:5]([C:6]([O:8][CH2:19][CH2:20][CH2:21][CH3:22])=[O:7])=[CH:4][C:3]=1[O:11][CH2:10][CH2:2][CH2:3][CH3:4]

Participants

6

Reactant 3

HCID 8002Butyl bromideHCID 10796Cesium carbonateHCID 64209734-Bromo-3-hydroxybenzoic acid

Product 1

HCID 57467609Butyl 4-bromo-3-(butyloxy)benzoateYield 66.81%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To a flask containing 4-bromo-3-hydroxybenzoic acid (D.1) (available from Combi-Blocks Inc.) (2.40 g, 11.06 mmol) and cesium carbonate (8.287 g, 25.44 mmol) in DMF (40 mL), was added 1-bromobutane (2.494 mL, 23.22 mmol), and the mixture was stirred overnight. The reaction was diluted with water and extracted with EtOAc. The organic layers were washed with brine, dried over Na2SO4, filtered, concentrated, and then purified by CombiFlash® chromatography (0 to 20% EtOAc/hexanes) to provide D.2 (2.4326 g, 66.81% yield).

Workup

  1. extractionextracted with EtOAc
  2. washThe organic layers were washed with brine
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. custompurified by CombiFlash® chromatography (0 to 20% EtOAc/hexanes)
  7. customto provide D.2 (2.4326 g, 66.81% yield)

Sources & evidence

ORD record
ord-68808c05ec394b43bcee50df20da8fa2
Source dataset
uspto-grants-2013_05
Patent number
US08450522B2

Reaction notes

Loading…