Ethyl bromoacetate → Ethyl 2-(3-amino-2,4-difluorophenoxy)acetate

HRID 1771593Notes

Reaction equation

HRID 1771593 reaction equation
[NH2:1][C:2]1[C:3]([F:10])=[C:4]([OH:9])[CH:5]=[CH:6][C:7]=1[F:8].C([O-])([O-])=O.[Na+].[Na+].Br[CH2:18][C:19]([O:21][CH2:22][CH3:23])=[O:20]>CN(C=O)C.O>[NH2:1][C:2]1[C:3]([F:10])=[C:4]([CH:5]=[CH:6][C:7]=1[F:8])[O:9][CH2:18][C:19]([O:21][CH2:22][CH3:23])=[O:20]

Participants

6

Reactant 3

HCID 7748Ethyl bromoacetateHCID 10340Sodium CarbonateHCID 227559833-Amino-2,4-difluorophenol

Product 1

HCID 89437136Ethyl 2-(3-amino-2,4-difluorophenoxy)acetateYield 75%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To a stirred solution of 3-amino-2,4-difluorophenol (intermediate X(a)) (713 mg, 4.9 mmol, 1.0 eq) in DMF (30 mL) was added Na2CO3 (1.56 g, 14.7 mmol, 3.0 eq). The resulting mixture was stirred for 40 min at room temperature. Ethyl bromoacetate (1 g, 5.90 mmol 1.2 eq) was added and the reaction stirred overnight. The reaction was diluted with water then extracted with EtOAc. The combined organic extracts were washed with brine, dried (Na2SO4), filtered and evaporated in vacuo. The residue was purified by chromatography (petroleum ether: EtOAc, 25:1) to give the title compound (intermediate IV(a)) as an oil (850 mg, 71%).

Workup

  1. stirringthe reaction stirred overnight
  2. extractionthen extracted with EtOAc
  3. washThe combined organic extracts were washed with brine
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. customevaporated in vacuo
  7. customThe residue was purified by chromatography (petroleum ether: EtOAc, 25:1)

Sources & evidence

ORD record
ord-1f5717139262433da3f417cdb136f1bc
Source dataset
uspto-grants-2016_02
Patent number
US09249085B2

Reaction notes

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