Benzyl Bromide → Methyl 3,4-bis(benzyloxy)benzoate

HRID 19985

Reaktionsgleichung

Reaktionsgleichung von HRID 19985
C(=O)([O-])[O-].[K+].[K+].[CH3:7][O:8][C:9](=[O:18])[C:10]1[CH:15]=[CH:14][C:13]([OH:16])=[C:12]([OH:17])[CH:11]=1.[CH2:19](Br)[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1>CC(C)=O>[CH3:7][O:8][C:9](=[O:18])[C:10]1[CH:15]=[CH:14][C:13]([O:16][CH2:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)=[C:12]([O:17][CH2:9][C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)[CH:11]=1

Komponenten

5

Edukt 3

HCID 7498Benzyl BromideHCID 11430Potassium CarbonateHCID 287064Methyl 3,4-Dihydroxybenzoate

Produkt 1

HCID 10545660Methyl 3,4-bis(benzyloxy)benzoateAusbeute 122,9 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 180AcetoneLösungsmittel

Versuchsvorschrift

Potassium carbonate (6.5 g; 47 mmol) was added to a solution of 3,4-dihydroxybenzoic acid methyl ester (2.6 g; 15.7 mmol) and benzyl bromide (5.37 g; 31.4 mmol) in acetone (100 ml). The reaction mixture was refluxed for 12 hrs. After the removal of the solvent under reduced pressure, the residue was partitioned between ethyl acetate (150 ml) and water (50 ml). The ethyl acetate layer was washed with water (50 ml) and dried over anhydrous magnesium sulfate. Removal of the solvent under reduced pressure provided 3.36 g of 3,4-Dibenzyloxy benzoic acid methyl ester (Yield=86.6%)

Aufarbeitung

  1. temperatureThe reaction mixture was refluxed for 12 hrs
  2. customAfter the removal of the solvent under reduced pressure
  3. customthe residue was partitioned between ethyl acetate (150 ml) and water (50 ml)
  4. washThe ethyl acetate layer was washed with water (50 ml)
  5. dry with materialdried over anhydrous magnesium sulfate
  6. customRemoval of the solvent under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-076a4c27aa214e05aa3d5ab817536595
Quelldatensatz
uspto-grants-2010_06
Patentnummer
US07745490B2

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