3-Methyl-1-trichloromethyl-2-butenyl diazoacetate → 4-Trichloromethyl-6,6-dimethyl-2-oxo-3-oxabicyclo[3.1.0]hexane

HRID 370562

Reaktionsgleichung

Reaktionsgleichung von HRID 370562
[N+](=[CH:3][C:4]([O:6][CH:7]([C:12]([Cl:15])([Cl:14])[Cl:13])[CH:8]=[C:9]([CH3:11])[CH3:10])=[O:5])=[N-]>O1CCOCC1.CCOCC.CC(CC(C)=O)=O.CC(CC(C)=O)=O.[Cu]>[Cl:13][C:12]([Cl:15])([Cl:14])[CH:7]1[CH:8]2[CH:3]([C:9]2([CH3:11])[CH3:10])[C:4](=[O:5])[O:6]1

Komponenten

5

Edukt 1

HCID 542243633-Methyl-1-trichloromethyl-2-butenyl diazoacetate

Produkt 1

HCID 125252184-Trichloromethyl-6,6-dimethyl-2-oxo-3-oxabicyclo[3.1.0]hexaneAusbeute 56,5 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 45052134Bis(pentane-2,4-dione-kappa~2~O~2~,O~4~)copperKatalysator2×HCID 3283Diethyl EtherLösungsmittelHCID 312751,4-DioxaneLösungsmittel2×

Versuchsvorschrift

To a refluxing solution of cupric acetylacetonate (0.07 g, 0.27 mole) in 70 ml of dioxane was added dropdropwise over a 31/2 hour period, under an argon atmosphere, a solution of (±)-3-methyl-1-trichloromethyl-2-butenyl diazoacetate (1.09 g, 0.004 moles) and cupric acetylacetonate (0.007 g, 0.027 mmole) in 10 ml of dioxane. The reaction mixture was then heated under reflux for one hour and evaporated to dryness, yielding a residue which was dissolved in ether. The ethereal solution was washed successively with two portions of aqueous 1N hydrochloric acid, two portions of aqueous sodium bicarbonate, and twice with saturated aqueous sodium chloride. After drying the solution over magnesium sulfate, the ether was evaporated to afford a pale yellow oil, which was purified by column chromatograpy on a silica gel column using a 9/1 mixture of n-hexane/ethyl acetate as the eluent, to give (±)-4-trichloromethyl-6,6-dimethyl-2-oxo-3-oxabicyclo[3.1.0]hexane (0.55 g, 53% yield).

Aufarbeitung

  1. temperatureThe reaction mixture was then heated
  2. temperatureunder reflux for one hour
  3. customevaporated to dryness
  4. customyielding a residue which
  5. washThe ethereal solution was washed successively with two portions of aqueous 1N hydrochloric acid, two portions of aqueous sodium bicarbonate
  6. dry with materialAfter drying the solution over magnesium sulfate
  7. customthe ether was evaporated
  8. customto afford a pale yellow oil, which
  9. customwas purified by column chromatograpy on a silica gel column
  10. additiona 9/1 mixture of n-hexane/ethyl acetate as the eluent

Quellen und Nachweise

ORD-Eintrag
ord-cc06d1e214544d0591514bd0aca7ab12
Quelldatensatz
uspto-grants-1985_07
Patentnummer
US04526987

Verknüpfte Notizen

Wird geladen…