Ethyl bromoacetate → Ethyl 2-[(5,6,7,8-tetrahydro-8-oxo-2-naphthalenyl)oxy]acetate

HRID 2228670Notes

Reaction equation

HRID 2228670 reaction equation
[OH:1][C:2]1[CH:11]=[C:10]2[C:5]([CH2:6][CH2:7][CH2:8][C:9]2=[O:12])=[CH:4][CH:3]=1.Br[CH2:14][C:15]([O:17][CH2:18][CH3:19])=[O:16].C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O.O>[O:12]=[C:9]1[CH2:8][CH2:7][CH2:6][C:5]2[CH:4]=[CH:3][C:2]([O:1][CH2:14][C:15]([O:17][CH2:18][CH3:19])=[O:16])=[CH:11][C:10]1=2

Participants

6

Reactant 3

HCID 7748Ethyl bromoacetateHCID 11430Potassium CarbonateHCID 5718187-hydroxy-3,4-dihydro-2H-naphthalen-1-one

Product 1

HCID 21193676Ethyl 2-[(5,6,7,8-tetrahydro-8-oxo-2-naphthalenyl)oxy]acetateYield 83.3%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
60 °C

Procedure

To a solution of 3,4-dihydro-7-hydroxy-1(2H)-naphthalenone (15.3 g, 94.3 mmol) in N,N-dimethylformamide (150 mL) were serially added ethyl bromoacetate (16.5 g, 99.0 mmol) and potassium carbonate (13.7 g, 99.0 mmol) and the mixture was stirred at 60° C. for 6 hours. This reaction mixture was diluted with water and extracted with ethyl acetate. The organic layer was washed with water and saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate (MgSO4), filtered, and concentrated under reduced pressure. The residue was crystallized from hexane-ethyl acetate to provide 19.5 g of the title compound. Yield 83%.

Workup

  1. extractionextracted with ethyl acetate
  2. washThe organic layer was washed with water and saturated aqueous sodium chloride solution
  3. dry with materialdried over anhydrous magnesium sulfate (MgSO4)
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was crystallized from hexane-ethyl acetate

Sources & evidence

ORD record
ord-778522fe632f41578bbd58a614e40a31
Source dataset
uspto-grants-2002_07
Patent number
US06417213B2

Reaction notes

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