Methanol → 1-Bromo-4-phenylbutane

HRID 278202

Reaction equation

HRID 278202 reaction equation
[C:1]1([CH2:7][CH2:8][CH2:9][CH2:10]O)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[Br-:12].[Br-].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CO>C(#N)C>[C:1]1([CH2:7][CH2:8][CH2:9][CH2:10][Br:12])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

Participants

5

Reactant 3

HCID 887MethanolHCID 76889BenzenebutanolHCID 12890784Triphenylphosphane dibromide

Product 1

HCID 2596681-Bromo-4-phenylbutaneYield 106.3%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

To a solution of 4-phenyl-1-butanol (21.75 g) in acetonitrile (300 mL) was added triphenylphosphine dibromide (67.23 g) in portions with stirring over 10 min. After stirring over night under nitrogen, methanol (4 mL) was added and after 1.5 h, the solvent was removed under reduced pressure. Hexanes (200 mL) and ˜75 g silica gel were added to the residue and the mixture was filtered and the filter cake was eluted with hexanes. The clear filtrate was concentrated to give 32.8 g of clear colorless liquid. This product was again eluted through silica gel using 1.5 L hexanes to give the title compound (24.7 g) as a colorless liquid.

Workup

  1. stirringAfter stirring over night under nitrogen
  2. customthe solvent was removed under reduced pressure
  3. additionHexanes (200 mL) and ˜75 g silica gel were added to the residue
  4. filtrationthe mixture was filtered
  5. washthe filter cake was eluted with hexanes
  6. concentrationThe clear filtrate was concentrated

Sources & evidence

ORD record
ord-06693a3616814cb881bb4b289a4578b1
Source dataset
uspto-grants-2002_03
Patent number
US06358979B1

Linked notes

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