Water → 3-Hydroxy-3-phenylbutan-2-one

HRID 1389555

Reaktionsgleichung

Reaktionsgleichung von HRID 1389555
[OH2:1].S(=O)(=O)(O)O.[OH:7][C:8]([C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)([CH3:11])[C:9]#[CH:10]>CO>[OH:7][C:8]([C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)([CH3:11])[C:9](=[O:1])[CH3:10]

Komponenten

5

Edukt 3

HCID 962Water2×HCID 1118Sulfuric AcidHCID 920983-Hydroxy-3-phenyl-1-butyne

Produkt 1

HCID 2332203-Hydroxy-3-phenylbutan-2-one

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel2×

Reaktionsbedingungen

Temperatur
55 °C

Versuchsvorschrift

The title compound is prepared by using a modified method of G. F. Hennion and B. R. Fleck, J. Amer. Chem. Soc., 77,3258(1955). To a mixture of methanol(5 ml), water (0.2 ml), sulfuric acid (100 mg), and mercuric sulfate (100 mg) is added at 55° C. a solution of 3-hydroxy-3-phenyl-1-butyne (2 g) in 90% aqueous methanol (5 ml) over a period of 90 min. The reaction is slightly exothermic, and the inside temperature is maintained at 55°-57° C. During the reaction time, 50 mg of mercuric sulfate is added. When addition of the acetylenic component is complete, another portion (50 mg) of mercuric sulfate is added, and the mixture is stirred at 55° C. for 1 hour. During this time 1 ml of water is added. After cooling, the reaction mixture is poured into ice-water and extracted with diethyl ether. The combined extracts are washed with water, dried over magnesium sulfate, filtered and evaporated. The resultant oil is chromatographed on silica gel using benzene. The appropriate eluates are evaporated to give 0.5 g of the title compound, ir(CHCl3)3450 and 1751 cm-1 and nmr(CDCl3) δ 1.75(s), 2.08(s), 4.50(s) and 7.40(m).

Aufarbeitung

  1. customThe title compound is prepared
  2. temperaturethe inside temperature is maintained at 55°-57° C
  3. temperatureAfter cooling
  4. extractionextracted with diethyl ether
  5. washThe combined extracts are washed with water
  6. dry with materialdried over magnesium sulfate
  7. filtrationfiltered
  8. customevaporated
  9. customThe resultant oil is chromatographed on silica gel
  10. customThe appropriate eluates are evaporated

Quellen und Nachweise

ORD-Eintrag
ord-9234af1330c640c194494c41b493b12c
Quelldatensatz
uspto-grants-1981_01
Patentnummer
US04244958

Verknüpfte Notizen

Wird geladen…