Reaktion #1552026

Reaktionsgleichung

t-BuOK

THF

4-(3-Propylcyclopentyl)-cyclohexanone

THF

chloride

THF

→

1-methoxymethylene-4-(3-propylcyclopentyl)cyclohexane

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONwas added
2. 2
   workup.WAITthe stirring was continued for another 2 hours
3. 3
   Extraktionwas extracted with toluene
4. 4
   workup.ADDITIONafter the addition of water (200 ml) The resulting organic layer
5. 5
   Waschenwas washed with water
6. 6
   Trocknendried over anhydrous sulfate
7. 7
   Einengenthe toluene was concentrated to a volume of about 100 ml under reduced pressure
8. 8
   workup.ADDITIONThe concentrate was poured into n-hexane (500 ml) and solids
9. 9
   Filtrationdeposited were filtered off
10. 10
    workup.DISTILLATIONThe solvent of the resulting solution was distilled off under reduced pressure
11. 11
    Sonstigethe residue was purified by silica gel chromatography (eluent: ethyl acetate/n-heptane=1/9 by volume)

Vorschrift

THF (100 ml) was added to methoxymethyltriphenylphophnium chloride (29.3 g) in a reaction vessel under an atmosphere of nitrogen, and the solution was cooled to −15° C. t-BuOK (10.5 g) in a THF (50 ml) solution was added, and the stirring was continued for another 1 hour. 4-(3-Propylcyclopentyl)-cyclohexanone (15.0 g) in a THF (50 ml) solution was added dropwise, and the stirring was continued for another 2 hours. The reaction mixture was warmed to room temperature and was extracted with toluene after the addition of water (200 ml) The resulting organic layer was washed with water and dried over anhydrous sulfate, and the toluene was concentrated to a volume of about 100 ml under reduced pressure. The concentrate was poured into n-hexane (500 ml) and solids deposited were filtered off. The solvent of the resulting solution was distilled off under reduced pressure, and the residue was purified by silica gel chromatography (eluent: ethyl acetate/n-heptane=1/9 by volume) to give 1-methoxymethylene-4-(3-propylcyclopentyl)cyclohexane (17.0 g).

Quelle