Reaktion #48668

Reaktionsgleichung

lithium aluminum hydride

tert-butanol

3-tert-butylcyclobutanone

hydride

→

title compound

Cis-3-tert-butylcyclobutanol

Lösungsmittel

tetrahydrofuran

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGStir for 1 hour at −78° C.
2. 2
   SonstigeSlowly quench the mixture with 0.1 N hydrochloric acid
3. 3
   workup.ADDITIONDilute the resulting mixture with ethyl acetate
4. 4
   workup.STIRRINGa saturated aqueous solution of sodium potassium tartrate (Rochelle salt) and stir the biphasic mixture overnight
5. 5
   FiltrationFilter the mixture
6. 6
   Sonstigeto remove
7. 7
   Sonstigeprecipitates
8. 8
   Sonstigeseparate the aqueous layer
9. 9
   EinengenSaturate the aqueous phase with sodium chloride
10. 10
    Extraktionextract with ethyl acetate
11. 11
    workup.ADDITIONAdd the
12. 12
    Extraktionorganic extract to the ethyl acetate solution of the reaction mixture
13. 13
    Waschenwash the resultant mixture with saturated aqueous sodium chloride solution
14. 14
    Trocknendry (magnesium sulfate)
15. 15
    Filtrationfilter
16. 16
    Einengenconcentrate

Vorschrift

Cool lithium aluminum hydride (16 mL, 16 mmol, 1.0 M solution in tetrahydrofuran) under a nitrogen atmosphere to 0° C. Add tert-butanol (4.6 mL, 48.1 mmol) dropwise, warm to room temperature, and stir the resulting solution for 1 hour. Cool the hydride solution to −78° C. and add a solution of 3-tert-butylcyclobutanone (1 g, 7.9 mmol) in dry tetrahydrofuran (3 mL) dropwise. Stir for 1 hour at −78° C. and then warm to room temperature over 1 hour. Slowly quench the mixture with 0.1 N hydrochloric acid. Dilute the resulting mixture with ethyl acetate and a saturated aqueous solution of sodium potassium tartrate (Rochelle salt) and stir the biphasic mixture overnight. Filter the mixture to remove precipitates and separate the aqueous layer. Saturate the aqueous phase with sodium chloride and extract with ethyl acetate. Add the organic extract to the ethyl acetate solution of the reaction mixture and wash the resultant mixture with saturated aqueous sodium chloride solution, dry (magnesium sulfate), filter, and concentrate to give the title compound as a 9:1 mixture of cis/trans diastereomers.

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