Acetone → 3,4-Dimethylhexane-2,5-dione

HRID 966890Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 966890
[CH3:1][C:2]1[O:3][C:4]([CH3:9])=[C:5]([CH3:8])[C:6]=1[CH3:7].CC(=[O:13])C>>[CH3:7][CH:6]([CH:5]([CH3:8])[C:4](=[O:3])[CH3:9])[C:2](=[O:13])[CH3:1]

Komponenten

3

Edukt 2

HCID 180AcetoneHCID 1391982,3,4,5-Tetramethylfuran

Produkt 1

HCID 328513,4-Dimethylhexane-2,5-dioneAusbeute 42,5 %

Versuchsvorschrift

Compound 219A was made in accordance with the procedures described in Hancock et al. J. Org. Chem. 42,1850-1856 (1977) & Amarnath et al. J. Org. Chem., 60, 301-307 (1995). 2-Propanone (100 mL, 1.1 mol) was refluxed over PbO2 (26.7 g, 0.112 mol) for 28 h. After cooling to rt, the reaction mixture was filtered and the residue was washed with acetone. The filtrate was concentrated under reduced pressure to remove the acetone and then distilled at 20 Torr. The fraction that came over between 100-120° C. was collected to give 6.75 g (42.5%) of 3,4-dimethylhexane-2,5-dione as a light yellow oil.

Aufarbeitung

  1. filtrationthe reaction mixture was filtered
  2. washthe residue was washed with acetone
  3. concentrationThe filtrate was concentrated under reduced pressure
  4. customto remove the acetone
  5. distillationdistilled at 20 Torr
  6. customcame over between 100-120° C.
  7. customwas collected

Quellen und Nachweise

ORD-Eintrag
ord-8af118769951479a916248b5ec6be493
Quelldatensatz
uspto-grants-2005_10
Patentnummer
US06953679B2

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