Reaktion #42259

Reaktionsgleichung

3-tert-butyl-1-methyl-6,6-diphenyl fulvene

2,7-di-tert-butyl-fluorene

hydrochloric acid

n-butyl lithium hexane

→

aimed compound

(3-tert-butyl-5-methyl-cyclopentadienyl)(2,7-di-tert-butyl-fluorenyl)diphenylmethane

Lösungsmittel

diethyl ether

diethyl ether

diethyl ether

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeIn a 200 ml three-necked flask equipped with a magnetic stirrer chip and three-way cock
2. 2
   SonstigeTo the reaction solution, a solution prepared
3. 3
   workup.ADDITIONwas added
4. 4
   workup.STIRRINGstirred
5. 5
   Temperaturwith refluxing for 7 days
6. 6
   Sonstigeto separate an organic phase
7. 7
   WaschenThe organic phase was washed with a saturated sodium bicarbonate aqueous solution and saturated brine
8. 8
   TrocknenThe organic phase was dried with anhydrous magnesium sulfate
9. 9
   Filtrationthe drying agent was filtered off
10. 10
    workup.DISTILLATIONthe solvent was distilled off from the filtrate under reduced pressure
11. 11
    Sonstigeto give a reddish-brown liquid
12. 12
    SonstigeThe liquid was purified by a column chromatography
13. 13
    workup.DISTILLATIONthe developing solvent was distilled off under reduced pressure
14. 14
    SonstigeThe remainder was re-crystallized
15. 15
    Sonstigedried under reduced pressure

Vorschrift

In a 200 ml three-necked flask equipped with a magnetic stirrer chip and three-way cock thoroughly purged with nitrogen, 2.53 g of 2,7-di-tert-butyl-fluorene (9.10 mmol) was dissolved in 70 ml of dehydrated diethyl ether in a nitrogen atmosphere. To the solution, 6.4 ml of a n-butyl lithium/hexane solution (1.56M: 9.98 mmol) was gradually added dropwise in an ice bath and stirred at room temperature over night. To the reaction solution, a solution prepared by dissolving 3.01 g of 3-tert-butyl-1-methyl-6,6-diphenyl fulvene (10.0 mmol) in 40 ml of dehydrated diethyl ether was added and stirred with refluxing for 7 days. The reaction mixture was added to 100 ml of a hydrochloric acid aqueous solution (1N) and thereafter diethyl ether was added to separate an organic phase. The organic phase was washed with a saturated sodium bicarbonate aqueous solution and saturated brine. The organic phase was dried with anhydrous magnesium sulfate, thereafter the drying agent was filtered off and the solvent was distilled off from the filtrate under reduced pressure to give a reddish-brown liquid. The liquid was purified by a column chromatography using 180 g of silica gel (developing solvent: n-hexane) and the developing solvent was distilled off under reduced pressure. The remainder was re-crystallized using methanol and dried under reduced pressure, and thereby the aimed compound was obtained in an amount of 1.65 g (2.85 mmol) as a pale yellow solid (yield: 31%).

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