Allyl bromide → 5-(prop-2-en-1-yloxy)-1H-indole

HRID 342766Notes

Reaction equation

HRID 342766 reaction equation
[OH:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][CH:6]=[CH:5]2.C(=O)([O-])[O-].[K+].[K+].[CH2:17](Br)[CH:18]=[CH2:19]>CN(C)C=O.C(OCC)(=O)C>[CH2:19]([O:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][CH:6]=[CH:5]2)[CH:18]=[CH2:17]

Participants

6

Reactant 3

HCID 7841Allyl bromideHCID 11430Potassium CarbonateHCID 160545-Hydroxyindole

Product 1

HCID 142392305-(prop-2-en-1-yloxy)-1H-indole

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
60 °C

Procedure

5-hydroxyindole (1.00 g, 7.29 mmol) and potassium carbonate (1.38 g, 9.94 mmol) were taken up in 20 mL of dimethylformamide (DMF) and stirred at 60° C. for 0.5 hours. Allyl bromide (0.57 mL, 6.62 mmol) was added and the reaction was stirred for an additional 18 hours then cooled and diluted with ethyl acetate. The organic layer was washed with water, brine, dried over magnesium sulfate, filtered, concentrated in vacuo, and the crude residue was purified by flash chromatography on silica gel (10% ethyl acetate/hexane) to provide the title compound.

Workup

  1. stirringthe reaction was stirred for an additional 18 hours
  2. temperaturethen cooled
  3. washThe organic layer was washed with water, brine
  4. dry with materialdried over magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customthe crude residue was purified by flash chromatography on silica gel (10% ethyl acetate/hexane)

Sources & evidence

ORD record
ord-33085e573e464e86beba1bd598388b28
Source dataset
uspto-grants-1999_01
Patent number
US05859051

Reaction notes

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