Water → 3-Bromo-2-methoxybenzaldehyde

HRID 1454514Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1454514
[Br:1][C:2]1[C:3]([OH:10])=[C:4]([CH:7]=[CH:8][CH:9]=1)[CH:5]=[O:6].[C:11](=O)([O-])[O-].[Cs+].[Cs+].CI.O>CN(C)C=O>[Br:1][C:2]1[C:3]([O:10][CH3:11])=[C:4]([CH:7]=[CH:8][CH:9]=1)[CH:5]=[O:6]

Komponenten

6

Edukt 4

HCID 962WaterHCID 6328Methyl iodideHCID 10796Cesium carbonateHCID 109105553-Bromo-2-hydroxybenzaldehyde

Produkt 1

HCID 110638083-Bromo-2-methoxybenzaldehydeAusbeute 97,2 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

3-Bromo-2-hydroxy-benzaldehyde (27 g, 134 mmol), prepared as described in N. Hofsloekken, L. Skatteboel, “Convenient Method for the ortho-Formulation of Phenols”, Acta Chemica Scandinavica, 1999, v. 53, p. 258-262), was dissolved in dimethylformamide (150 mL) and then cesium carbonate (54.7 g, 170 mmol) was added to the solution portionwise. The mixture was stirred for 30 minutes and then methyl iodide (28.5 g, 201 mmol) was added. The mixture was stirred for 20 hours and poured into water. The product was extracted with ethyl ether and the organic layer was washed with water and brine, dried over magnesium sulfate and concentrated to give 3-bromo-2-methoxybenzaldehyde (28 g).

Aufarbeitung

  1. stirringThe mixture was stirred for 20 hours
  2. extractionThe product was extracted with ethyl ether
  3. washthe organic layer was washed with water and brine
  4. dry with materialdried over magnesium sulfate
  5. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-1e3406207f9e452592850ec2c3243f76
Quelldatensatz
uspto-grants-2009_01
Patentnummer
US07479502B2

Notizen zur Reaktion

Wird geladen…