Ethanol → HCID 14650456, Verbindung

HRID 1200188Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1200188
[C:1]1([C:7]2[O:8][C:9]3[C:17]([CH2:18][C:19]([OH:21])=[O:20])=[CH:16][CH:15]=[CH:14][C:10]=3[C:11](=[O:13])[CH:12]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH:2]=1.S(=O)(=O)(O)O.[CH2:27](O)[CH3:28]>>[C:1]1([C:7]2[O:8][C:9]3[C:17]([CH2:18][C:19]([O:21][CH2:27][CH3:28])=[O:20])=[CH:16][CH:15]=[CH:14][C:10]=3[C:11](=[O:13])[CH:12]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH:2]=1

Komponenten

4

Edukt 3

HCID 702EthanolHCID 1118Sulfuric AcidHCID 14650449HCID 14650449, Verbindung

Produkt 1

HCID 14650456HCID 14650456, Verbindung

Versuchsvorschrift

[2-(1-Cyclohexenyl)-4-oxo-4H-[1]-benzopyran-8-yl]acetic acid (2.0 g) was dissolved in ethanol (50 ml) and to the solution was added conc. sulfuric acid (0.5 ml). The mixture was heated under reflux for 5 hours. After dilution with water, the mixture was extracted with ethyl acetate and the extract was washed with water, dried (MgSO4) and concentrated under reduced pressure to obtain the title compound as crystals. The crystals were recrystallized from ethyl acetate to obtain prisms, yield 1.34 g (61.0%), m.p. 126°-127° C.

Aufarbeitung

  1. temperatureThe mixture was heated
  2. temperatureunder reflux for 5 hours
  3. extractionAfter dilution with water, the mixture was extracted with ethyl acetate
  4. washthe extract was washed with water
  5. dry with materialdried (MgSO4)
  6. concentrationconcentrated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-90bb2b0bde91408a8b1e5f90916d1703
Quelldatensatz
uspto-grants-1990_02
Patentnummer
US04904690

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