Reaktion #2784

Reaktionsgleichung

diphenylfulvene

hexane

n-butyllithium

fluorene

→

1,1-cyclopentadienyl-(9-fluorenyl)diphenylmethane

Ausbeute 42.0%

Lösungsmittel

water

tetrahydrofuran

Reaktionsbedingungen

Aufarbeitung

1. 1
   Extraktionthe solution was extracted with ether
2. 2
   TrocknenThe ether phase was dried over MgSO4
3. 3
   Einengenconcentrated
4. 4
   workup.WAITthe residue was left
5. 5
   Sonstigeto crystallize at -35° C

Vorschrift

12.3 cm3 (30.7 mmol) of a 2.5 molar hexane solution of n-butyllithium were slowly added to a solution of 5.10 g (30.7 mmol) of fluorene in 60 cm3 of tetrahydrofuran at room temperature. After 40 minutes, 7.07 g (30.7 mmol) of diphenylfulvene were added to the orange solution and the mixture was stirred overnight. 60 cm3 of water were added to the dark red solution, whereupon the solution became yellow in color, and the solution was extracted with ether. The ether phase was dried over MgSO4 and concentrated and the residue was left to crystallize at -35° C. 5.1 g (42%) of 1,1-cyclopentadienyl-(9-fluorenyl)diphenylmethane were obtained as a beige powder.

Quelle