Reaktion #481594

Reaktionsgleichung

2-ethylanthraquinone

NBS

benzoyl peroxide

→

2-(1-bromoethyl)-anthraquinone

Lösungsmittel

CCl4

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturat reflux for 1.5 hours
2. 2
   TemperaturOn cooling
3. 3
   Filtrationthe precipitate is collected by filtration
4. 4
   Waschenwashed on the
5. 5
   Filtrationfilter with ethanol, hot water and finally ethanol again
6. 6
   SonstigeAfter drying
7. 7
   Sonstigethis may be used without further purification (i.e. recrystallisation from benzene/methanol (1:1))

Vorschrift

A mixture of 2-ethylanthraquinone (25 Kg, 105.9 mol), NBS (19.1 Kg, 107.3 mol) and benzoyl peroxide (70%, 200 g, 0.58 mol) in CCl4 (˜150L) is stirred at reflux for 1.5 hours. On cooling, the precipitate is collected by filtration and washed on the filter with ethanol, hot water and finally ethanol again. After drying, this may be used without further purification (i.e. recrystallisation from benzene/methanol (1:1)).

Quelle