4-Hydroxybenzaldehyde → Ethyl 2-(4-formylphenoxy)acetate

HRID 992719Notes

Reaction equation

HRID 992719 reaction equation
[OH:1][C:2]1[CH:9]=[CH:8][C:5]([CH:6]=[O:7])=[CH:4][CH:3]=1.C(=O)([O-])[O-].[K+].[K+].C1(C)C=CC(S(O)(=O)=O)=CC=1.II.[CH2:29]([O:31][C:32](=[O:35])[CH2:33]Br)[CH3:30]>O.C1(C)C(C)=CC=CC=1>[C:32]([CH2:33][O:1][C:2]1[CH:9]=[CH:8][C:5]([CH:6]=[O:7])=[CH:4][CH:3]=1)([O:31][CH2:29][CH3:30])=[O:35]

Participants

8

Reactant 5

HCID 1264-HydroxybenzaldehydeHCID 807IodineHCID 6101p-Toluenesulfonic acidHCID 7748Ethyl bromoacetateHCID 11430Potassium Carbonate

Product 1

HCID 291358Ethyl 2-(4-formylphenoxy)acetate

Reagents, catalysts & solvents 2

HCID 962WaterSolvent2×HCID 7237O-XyleneSolvent

Procedure

4-Hydroxybenzaldehyde (250 g, 2.05 M), potassium carbonate (565 g. 4.09 M), xylene (2.5 L), p-toluenesulfonic acid (39 g, 0.21 M) and iodine (2 g, catalytic) were taken in a 5 L 4-neck round bottom flask with mechanical stirrer and a Dean-Stark condenser. Ethylbromoacetate (341 g, 2.05 M) was added and the reaction was refluxed for 6-8 hours, under azeotropic removal of water while monitoring the reaction on TLC. After the completion of the reaction, water was added and the organic layer separated while the aq. layer was extracted with xylene (2×500 ml). The combined organic layers were washed with brine and concentrated under vacuum to yield 4-((carboethoxy)methoxy)benzaldehyde as an oily material (408 g, Y=97%, P=99%).

Workup

  1. customthe reaction on TLC
  2. additionwas added
  3. customthe organic layer separated while the aq. layer
  4. extractionwas extracted with xylene (2×500 ml)
  5. washThe combined organic layers were washed with brine
  6. concentrationconcentrated under vacuum

Sources & evidence

ORD record
ord-a4939aa35976458db86b1f748aa00e4e
Source dataset
uspto-grants-2002_10
Patent number
US06469167B1

Reaction notes

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