Reaktion #164862

Reaktionsgleichung

1,5-Diphenyl-1,4-pentadien-3-one

→

clear oil

Ausbeute 80.0%

1,5-Diphenylpentan-3-one

Ausbeute 80.0%

Lösungsmittel

ethyl acetate

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigefor 2 hr
2. 2
   Sonstigeat room temperature
3. 3
   FiltrationThe resulting mixture was filtered through celite
4. 4
   Sonstigethe solvent evaporated
5. 5
   Sonstigeto afford an oil
6. 6
   SonstigeThe crude oil was chromatographed on silica gel with ethyl acetate/hexane

Vorschrift

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.

Quelle