Tetrahydrofuran → 3-phenyl-2(5H)-furanone

HRID 1063417Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1063417
I[C:2]([C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1)=[CH:3][CH2:4][OH:5].[O:12]1CCC[CH2:13]1>>[C:6]1([C:2]2[C:13](=[O:12])[O:5][CH2:4][CH:3]=2)[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1

Komponenten

3

Edukt 2

HCID 8028TetrahydrofuranHCID 536628553-Iodo-3-phenylprop-2-en-1-ol

Produkt 1

HCID 109865363-phenyl-2(5H)-furanoneAusbeute 91 %

Reaktionsbedingungen

Temperatur
50 °C

Versuchsvorschrift

3-Iodo-3-phenyl-prop-2-en-1-ol (Description 1; 1 g, 3.8 mM) was dissolved in tetrahydrofuran (20 ml) and Hunig's base (2.67 ml, 15.4 mM) and degassed using a Firestone valve (×3). Carbon monoxide was bubbled through the solution for 10 minutes after which tris(dibenzylideneacetone)dipalladium (141 mg; 4 mol %) and 1,4 bis(diphenylphosphino) butane (65 mg; 4 mol %) were added. The reaction was heated at 50° C. under an atmosphere of carbon monoxide. After 2 hours, when the reaction was 50% complete, an extra addition of the palladium source and phosphine ligand were made. After a further 2 hours the reaction was cooled, filtered, the solvent removed in vacuo and the residue was dispersed between ethyl acetate and water. The aqueous layer was extracted with ethyl acetate (2×40 ml), the combined organic layers were washed with brine, dried over MgSO4 and the solvent removed in vacuo. Purification was carried out by silica chromatography eluting in increasing concentrations of ethyl acetate in hexane (0-15%) to afford the title compound as a tan-coloured solid (0.56 g, yield 91%).

Aufarbeitung

  1. customHunig's base (2.67 ml, 15.4 mM) and degassed
  2. customCarbon monoxide was bubbled through the solution for 10 minutes after which tris(dibenzylideneacetone)dipalladium (141 mg; 4 mol %) and 1,4 bis(diphenylphosphino) butane (65 mg; 4 mol %)
  3. additionwere added
  4. additionan extra addition of the palladium source and phosphine ligand
  5. temperatureAfter a further 2 hours the reaction was cooled
  6. filtrationfiltered
  7. customthe solvent removed in vacuo
  8. additionthe residue was dispersed between ethyl acetate and water
  9. extractionThe aqueous layer was extracted with ethyl acetate (2×40 ml)
  10. washthe combined organic layers were washed with brine
  11. dry with materialdried over MgSO4
  12. customthe solvent removed in vacuo
  13. customPurification
  14. washeluting
  15. temperaturein increasing concentrations of ethyl acetate in hexane (0-15%)

Quellen und Nachweise

ORD-Eintrag
ord-0492d96c79e1485c835fefd4a967b82f
Quelldatensatz
uspto-grants-2005_11
Patentnummer
US06964981B2

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