Reaktion #1375845

Reaktionsgleichung

sodium cyclopentadienylide

→

colourless oil

Ausbeute 69.0%

3-butenylcyclopentadiene

Ausbeute 69.0%

Lösungsmittel

THF

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturto warm to room temperature
2. 2
   Extraktionthe product extracted with ether (3×75 ml)
3. 3
   TrocknenThe combined organic fractions were dried over magnesium sulphate for 2 hours
4. 4
   Filtrationfiltered
5. 5
   Sonstigethe solvents removed under reduced pressure
6. 6
   Sonstigea rotary evaporator
7. 7
   Sonstigeto yield a dark brown oil
8. 8
   workup.DISTILLATIONThe crude product was distilled under reduced pressure (b.p. 50°-51° C. @ 15 mm Hg)

Vorschrift

To a solution of 25.0 g (110 mmol) 3-buten-1-tosylate prepared according to step (a) above in 200 ml THF cooled to 0° C. was added 68.9 ml of 2.0 M (138 mmol) sodium cyclopentadienylide in THF. The reaction mixture was allowed to warm to room temperature and was stirred for 16 h. 100 ml concentrated aqueous saline solution was added and the product extracted with ether (3×75 ml). The combined organic fractions were dried over magnesium sulphate for 2 hours, filtered and the solvents removed under reduced pressure using a rotary evaporator to yield a dark brown oil. The crude product was distilled under reduced pressure (b.p. 50°-51° C. @ 15 mm Hg) to give 5.71 g of a colourless oil (47.6 mmol, 43.3%).

Quelle