Reaktion #2040556

Reaktionsgleichung

cyclopentadiene

NaOH

octyl bromide

→

tetra(octyl)cyclopentadiene

Lösungsmittel

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeA double-walled reactor having
2. 2
   Sonstigea volume of 1.5 L, provided with baffles, condenser, top stirrer
3. 3
   workup.STIRRINGAfter 1 hour's stirring at room temperature the reaction mixture
4. 4
   Temperaturwas heated to 35° C.
5. 5
   workup.STIRRING' stirring
6. 6
   workup.STIRRINGStirring
7. 7
   Sonstigephase separation
8. 8
   workup.ADDITION920 g (11.5 mol) of fresh 50% strength NaOH were added
9. 9
   workup.WAITfollowed by a further 5 hours
10. 10
    workup.STIRRING' stirring at room temperature
11. 11
    workup.DISTILLATIONThe product was distilled at reduced pressure
12. 12
    workup.DISTILLATIONAfter vacuum distillation

Vorschrift

A double-walled reactor having a volume of 1.5 L, provided with baffles, condenser, top stirrer, thermometer and dropping funnel was charged with 900 g of clear 50% strength NaOH (11.3 mol), followed by cooling to 10° C. Then 30 g of Aliquat 336 (74 mmol) and 48 g (0.72 mol) of freshly cracked cyclopentadiene were added. The reaction mixture was stirred turbulently for a few minutes. Then 577 g of octyl bromide (2.99 mol) were added in one hour's time, cooling with water taking place at the same time. After 1 hour's stirring at room temperature the reaction mixture was heated to 35° C., followed by a further 6 hours' stirring. Stirring was stopped and phase separation was awaited. The water layer was drawn off and 920 g (11.5 mol) of fresh 50% strength NaOH were added, followed by a further 5 hours' stirring at room temperature. GC was used to show that at that instant 10% of tri-, 83% of tetra- and 7% of penta(octyl)cyclopentadiene were present in the mixture. The product was distilled at reduced pressure. After vacuum distillation, 226.6 g of tetra(octyl)cyclopentadiene were obtained. Characterization of the product took place with the aid of GC, GC-MS, 13C- and 1H-NMR.

Quelle