Methyl iodide → 2-Bromo-1,3-dimethoxy-5-(methoxymethyl)benzene

HRID 347868

Reaktionsgleichung

Reaktionsgleichung von HRID 347868
[H-].[Na+].[Br:3][C:4]1[C:9]([O:10][CH3:11])=[CH:8][C:7]([CH2:12][OH:13])=[CH:6][C:5]=1[O:14][CH3:15].IC.[C:18](OCC)(=O)C>CN(C)C=O>[Br:3][C:4]1[C:9]([O:10][CH3:11])=[CH:8][C:7]([CH2:12][O:13][CH3:18])=[CH:6][C:5]=1[O:14][CH3:15]

Komponenten

6

Edukt 4

HCID 6328Methyl iodideHCID 8857Ethyl AcetateHCID 24758Sodium hydrideHCID 11149289(4-Bromo-3,5-dimethoxyphenyl)methanol

Produkt 1

HCID 230809402-Bromo-1,3-dimethoxy-5-(methoxymethyl)benzene

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

Sodium hydride (60% in oil; 24.7 g) was added to a solution of (4-bromo-3,5-dimethoxyphenyl)methanol (118.8 g) in N,N-dimethylformamide (960 mL) while cooling with ice, and after stirring for 10 minutes, iodomethane (41.7 mL) was added dropwise, the temperature was increased to room temperature and stirring was continued for 1 hour. The obtained reaction mixture was poured into ice water (2.5 L), extraction was performed with ethyl acetate, the extract was washed with brine and dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography and the title compound (121.3 g) was obtained as a colorless oil from the n-hexane:ethyl acetate (4:1) fraction.

Aufarbeitung

  1. temperaturewhile cooling with ice
  2. stirringstirring
  3. waitwas continued for 1 hour
  4. customThe obtained reaction mixture
  5. washthe extract was washed with brine
  6. dry with materialdried over anhydrous magnesium sulfate
  7. customthe solvent was evaporated under reduced pressure
  8. customThe residue was purified by silica gel column chromatography

Quellen und Nachweise

ORD-Eintrag
ord-8de60d3a532e4ce8a40c12f13e2c0ca7
Quelldatensatz
uspto-grants-2007_02
Patentnummer
US07176216B2

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