Reaktion #166839

Reaktionsgleichung

Potassium acetate

2,7-dibromo-9,10-dihydro-phenanthrene

NBS

benzoyl peroxide

→

2,7-dibromo-phenanthrene

Ausbeute 96.4%

Lösungsmittel

EtOAc

acetic acid

carbon tetrachloride

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturwas refluxed for 2 hours
2. 2
   TemperaturThe mixture was cooled
3. 3
   WaschenThe organic phase was washed with water, saturated sodium bicarbonate, and brine
4. 4
   Trocknenwas dried with sodium sulfate
5. 5
   EinengenConcentration

Vorschrift

The mixture of 2,7-dibromo-9,10-dihydro-phenanthrene (2.4 g, 7.1 mmol), NBS (1.4 g, 7.8 mmol), and benzoyl peroxide (0.2 g) in carbon tetrachloride (300 ml) was refluxed for 2 hours. Potassium acetate (3.6 g) and acetic acid (3.2 ml) were added, and the refluxing was continued for additional 2 hours. The mixture was cooled and diluted with EtOAc. The organic phase was washed with water, saturated sodium bicarbonate, and brine, and was dried with sodium sulfate. Concentration gave 2,7-dibromo-phenanthrene (2.3 g).

Quelle