Reaktion #85154

Reaktionsgleichung

diisobutylaluminum hydride

methyl 1-(trifluoromethyl)cyclopropanecarboxylate

→

[1-(Trifluoromethyl)cyclopropyl]methanol

Lösungsmittel

dichloromethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigethe reaction was subsequently terminated by addition of 10 ml of methanol
2. 2
   workup.ADDITIONThe reaction mixture was diluted with 30 ml of aqueous 20% strength sodium potassium tartrate solution and 30 ml of aqueous buffer solution (pH 7)
3. 3
   workup.STIRRINGstirred vigorously at room temperature overnight
4. 4
   SonstigeThe phases were separated
5. 5
   Extraktionthe aqueous phase was extracted three times with dichloromethane
6. 6
   TrocknenThe combined organic phases were dried over magnesium sulphate
7. 7
   Filtrationfiltered
8. 8
   Sonstigethe solvent was removed under reduced pressure

Vorschrift

At 0° C., 26.7 ml (26.7 mmol) of diisobutylaluminum hydride (1M in dichloromethane) were slowly added dropwise to a solution of 1.89 g (10.7 mmol) of methyl 1-(trifluoromethyl)cyclopropanecarboxylate in 10 ml of dichloromethane. The mixture was then stirred at 0° C. for another 2 h and the reaction was subsequently terminated by addition of 10 ml of methanol. The reaction mixture was diluted with 30 ml of aqueous 20% strength sodium potassium tartrate solution and 30 ml of aqueous buffer solution (pH 7) and stirred vigorously at room temperature overnight. The phases were separated and the aqueous phase was extracted three times with dichloromethane. The combined organic phases were dried over magnesium sulphate and filtered, and the solvent was removed under reduced pressure. The crude product corresponded to the title compound. Yield: 0.96 g (64% of theory)

Quelle