Reaktion #1714592

Reaktionsgleichung

1-bromooctane

sodium cyclopentadienide

1,3-dimethyl-2-imidazolidinone

→

n-octylcyclopentadiene

Lösungsmittel

THF

THF

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGThe mixture was further stirred at room temperature for 24 hours
2. 2
   Temperaturwas cooled to 0° C
3. 3
   SonstigeThe reaction was terminated
4. 4
   workup.ADDITIONby adding 1N hydrochloric acid, and hexane
5. 5
   workup.ADDITIONwas added to the reaction liquid
6. 6
   WaschenThe organic layer was washed with a saturated aqueous sodium hydrogen carbonate solution
7. 7
   TrocknenThe organic layer was dried over magnesium sulfate
8. 8
   Filtrationwas filtered
9. 9
   Einengenwas concentrated under reduced pressure
10. 10
    workup.DISTILLATIONThe concentrate was purified by distillation under reduced pressure

Vorschrift

THF in a volume of 100 ml was added to 50 ml (100 mmol) of a 2 M THF solution of sodium cyclopentadienide, and the mixture was cooled to −78° C. A THF solution of 19.3 g (100 mmol) of 1-bromooctane was added thereto dropwise. Further, 11.4 g (100 mmol) of 1,3-dimethyl-2-imidazolidinone was added dropwise. The mixture was stirred at −78° C. The mixture was further stirred at room temperature for 24 hours and was cooled to 0° C. The reaction was terminated by adding 1N hydrochloric acid, and hexane was added to the reaction liquid. The organic layer was washed with a saturated aqueous sodium hydrogen carbonate solution and then with a saturated aqueous sodium chloride solution. The organic layer was dried over magnesium sulfate, was filtered, and was concentrated under reduced pressure. The concentrate was purified by distillation under reduced pressure to give 6.7 g (37.5 mmol) of target n-octylcyclopentadiene. The compound was identified by GC-MS. GC-MS: 178 (MS).

Quelle