Dimethylformamide → 2-(4-Bromo-2-fluoro-phenoxy)-2-methyl-propionic acid methyl ester

HRID 858583Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 858583
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([OH:8])=[C:4]([F:9])[CH:3]=1.Br[CH:11]([CH2:15]C)[C:12]([O-])=O.[C:17]([O-:20])([O-])=[O:18].[K+].[K+].[CH3:23]N(C=O)C>>[CH3:23][O:20][C:17](=[O:18])[C:11]([O:8][C:5]1[CH:6]=[CH:7][C:2]([Br:1])=[CH:3][C:4]=1[F:9])([CH3:15])[CH3:12]

Komponenten

5

Edukt 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 1523172-BromobutyrateHCID 27249814-Bromo-2-fluorophenol

Produkt 1

HCID 575272722-(4-Bromo-2-fluoro-phenoxy)-2-methyl-propionic acid methyl esterAusbeute 77 %

Reaktionsbedingungen

Temperatur
100 °C

Versuchsvorschrift

To a solution of 4-Bromo-2-fluorophenol (1 g, 5.24 mmol) and methyl □-bromobutyrate (1.89 g, 10.47 mmol) in DMF (20 mL) was added K2CO3 (3.6 g, 26 mmol). The resultant slurry was heated to 100° C. under argon for 12 h. DMF was evaporate and residue partitioned between EtOAC and 1 N HCl. The organic layer was washed with H2O, and brine then dried over Na2SO4. The solvent was removed in vacuo and the residue was purified by flash column chromatography (10% EtOAc in hexanes) to provide the desired product (1.17 g, 77%) as a white solid.

Aufarbeitung

  1. customDMF was evaporate
  2. customresidue partitioned between EtOAC and 1 N HCl
  3. washThe organic layer was washed with H2O, and brine
  4. dry with materialthen dried over Na2SO4
  5. customThe solvent was removed in vacuo
  6. customthe residue was purified by flash column chromatography (10% EtOAc in hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-a8d16873e5264e1c8adae38900768f24
Quelldatensatz
uspto-grants-2006_12
Patentnummer
US07148226B2

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