Dibenzylidene acetone → 1,5-Diphenylpentan-3-one

HRID 77680

Reaktionsgleichung

Reaktionsgleichung von HRID 77680
[C:1]1([CH:7]=[CH:8][C:9](=[O:18])[CH:10]=[CH:11][C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1>[Pd].C(OCC)(=O)C>[C:12]1([CH2:11][CH2:10][C:9](=[O:18])[CH2:8][CH2:7][C:1]2[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=2)[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1

Komponenten

4

Edukt 1

HCID 95417Dibenzylidene acetone

Produkt 1

HCID 214961,5-Diphenylpentan-3-oneAusbeute 80 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23938PalladiumKatalysatorHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

1,5-Diphenyl-1,4-pentadien-3-one (20b, 1.00 g, 4.3 mmol) and palladium on activated carbon (0.25 g, 5%) were combined in ethyl acetate (50 ml). The mixture was placed under a hydrogen atmosphere (60 psi) on a Parr apparatus for 2 hr at room temperature. The resulting mixture was filtered through celite and the solvent evaporated to afford an oil. The crude oil was chromatographed on silica gel with ethyl acetate/hexane to give 0.82 g (80%) of a clear oil; 1H NMR: δ 2.76 (t, 4H, J=7.6 Hz), 2.97 (t, 4H, J=7.4 Hz), 7.30 (m, 10H); 13C NMR: δ 29.6, 44.2, 125.8, 128.0, 128.2, 140.7, 208.4.

Aufarbeitung

  1. customfor 2 hr
  2. customat room temperature
  3. filtrationThe resulting mixture was filtered through celite
  4. customthe solvent evaporated
  5. customto afford an oil
  6. customThe crude oil was chromatographed on silica gel with ethyl acetate/hexane

Quellen und Nachweise

ORD-Eintrag
ord-21815f73184541f1954e950151f159ed
Quelldatensatz
uspto-grants-2014_09
Patentnummer
US08841326B2

Verknüpfte Notizen

Wird geladen…