Reaktion #717762

Reaktionsgleichung

benzyl phenyl ketone

sodium cyclopentadienide

magnesium chloride

→

6-benzyl-6-phenylfulvene

Ausbeute 62.0%

Lösungsmittel

THF

THF

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturThen, the product was heated for an hour
2. 2
   Temperaturunder reflux
3. 3
   Temperaturthe obtained pink slurry was cooled in an ice bath
4. 4
   workup.ADDITIONwas subsequently added
5. 5
   workup.STIRRINGThen, the product was stirred at room temperature for 18 hours
6. 6
   Sonstigethe obtained orange solution was quenched with dilute aqueous hydrochloric acid
7. 7
   workup.ADDITIONThen, 30 mL of diethyl ether was added
8. 8
   Extraktionthe soluble part in diethyl ether was extracted
9. 9
   Waschenwashed with an aqueous solution of saturated sodium hydrogen carbonate, water
10. 10
    workup.DISTILLATIONThe solvent was distilled off
11. 11
    Sonstigethe residue was purified by silica gel column chromatography
12. 12
    Sonstigeto obtain an objective that

Vorschrift

Under a nitrogen atmosphere, 2.45 g (25.7 mmol) of anhydrous magnesium chloride and 20 mL of dry THF were put into a 100-mL Schlenk flask and then stirred. To this mixed solution, 10.6 mL (21.2 mmol) of a solution of 2.0-M sodium cyclopentadienide in THF was added. Then, the product was heated for an hour under reflux, the obtained pink slurry was cooled in an ice bath, and a solution in which 3.5 g (17.8 mmol) of benzyl phenyl ketone had been dissolved in 15 mL of dry THF was subsequently added thereto. Then, the product was stirred at room temperature for 18 hours, and the obtained orange solution was quenched with dilute aqueous hydrochloric acid. Then, 30 mL of diethyl ether was added thereto, the soluble part in diethyl ether was extracted, and the organic layer was neutralized and washed with an aqueous solution of saturated sodium hydrogen carbonate, water, and a saturated salt solution and then dehydrated with anhydrous magnesium sulfate. The solvent was distilled off, and then the residue was purified by silica gel column chromatography to obtain an objective that was a reddish orange solid (amount: 2.7 g and yield: 62%).

Quelle