Water → benzofuran-3-one O-methyl oxime

HRID 1250022Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1250022
[O:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[C:3](=[N:10][OH:11])[CH2:2]1.[H-].[Na+].S(OC)(O[CH3:18])(=O)=O.O>CN(C)C=O>[CH3:18][O:11][N:10]=[C:3]1[C:4]2[CH:9]=[CH:8][CH:7]=[CH:6][C:5]=2[O:1][CH2:2]1

Komponenten

6

Edukt 4

HCID 962WaterHCID 6497Dimethyl SulfateHCID 24758Sodium hydrideHCID 73014405Benzofuran-3-one oxime

Produkt 1

HCID 54271616benzofuran-3-one O-methyl oximeAusbeute 42 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

3.7 g of benzofuran-3-one oxime are dissolved in 15 ml of dimethylformamide. At 20° C., 1 g of sodium hydride (60%) is added and the mixture is stirred until the evolution of gas ceases. 3.15 g of dimethyl sulphate are then added dropwise and the mixture is stirred at 20° C. for 24 hours. The reaction mixture is poured into water, extracted with ethyl acetate, the organic phase is dried over sodium sulphate and the solvent is distilled off under reduced pressure. The residue is chromatographed over silica gel using n-hexane/acetone (4:1). 1.7 g (42% of theory) of benzofuran-3-one O-methyl-oxime are obtained as an oil.

Aufarbeitung

  1. stirringthe mixture is stirred at 20° C. for 24 hours
  2. extractionextracted with ethyl acetate
  3. dry with materialthe organic phase is dried over sodium sulphate
  4. distillationthe solvent is distilled off under reduced pressure
  5. customThe residue is chromatographed over silica gel

Quellen und Nachweise

ORD-Eintrag
ord-91e68639cd8645dca37b716d2dad0091
Quelldatensatz
uspto-grants-2002_01
Patentnummer
US06335454B1

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