Allyl bromide → 5,6,7,8-tetrahydro-5-oxo-1-(2-propenyl)-2(1H)-quinolinone

HRID 1195169Notes

Reaction equation

HRID 1195169 reaction equation
[O:1]=[C:2]1[CH2:11][CH2:10][CH2:9][C:8]2[NH:7][C:6](=[O:12])[CH:5]=[CH:4][C:3]1=2.[H-].[Li+].Br[CH2:16][CH:17]=[CH2:18]>CN(C)C=O>[O:1]=[C:2]1[CH2:11][CH2:10][CH2:9][C:8]2[N:7]([CH2:18][CH:17]=[CH2:16])[C:6](=[O:12])[CH:5]=[CH:4][C:3]1=2

Participants

5

Reactant 3

HCID 7841Allyl bromideHCID 62714Lithium hydrideHCID 2674502-Hydroxy-7,8-dihydro-5(6H)-quinolinone

Product 1

HCID 103305125,6,7,8-tetrahydro-5-oxo-1-(2-propenyl)-2(1H)-quinolinoneYield 63%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
25 °C

Procedure

A mixture of 5,6,7,8-tetrahydro-5-oxo-2(1H)-quinolinone (20.0 g), lithium hydride (1.57 g), and dimethylformamide (800 ml) was stirred for 3 hrs at 25° C., under nitrogen. 3-Bromopropene (15.5 g) was added and the mixture was stirred for an additional eighteen hrs. The reaction mixture was concentrated and the residue was partitioned between ethyl acetate and water. The layers were separated and the aqueous layer was extracted with ethyl acetate. The combined organic extracts were washed with water and brine, dried over anhydrous magnesium sulfate, filtered, and the filtrate was concentrated. The residue was triturated with petroleum ether to afford 15.7 g (63%) of 5,6,7,8-tetrahydro-5-oxo-1-(2-propenyl)-2(1H)-quinolinone.

Workup

  1. stirringthe mixture was stirred for an additional eighteen hrs
  2. concentrationThe reaction mixture was concentrated
  3. customthe residue was partitioned between ethyl acetate and water
  4. customThe layers were separated
  5. extractionthe aqueous layer was extracted with ethyl acetate
  6. washThe combined organic extracts were washed with water and brine
  7. dry with materialdried over anhydrous magnesium sulfate
  8. filtrationfiltered
  9. concentrationthe filtrate was concentrated
  10. customThe residue was triturated with petroleum ether

Sources & evidence

ORD record
ord-a4b362ce64c4468e9da61ff3a9e5d7dc
Source dataset
uspto-grants-1992_05
Patent number
US05110815

Reaction notes

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