Reaktion #96088

Reaktionsgleichung

2-biphenylmethanol

sulfuric acid

hydrobromic acid

→

2-(bromomethyl)biphenyl

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturunder reflux for 5 hours
2. 2
   Extraktionthe resulting mixture extracted with three portions of 100 ml each of diethyl ether
3. 3
   WaschenThe combined extracts were washed with 50 ml of a saturated aqueous solution of sodium bicarbonate
4. 4
   TrocknenThe organic layer was dried with magnesium sulfate
5. 5
   Filtrationfiltered
6. 6
   Einengenthe filtrate concentrated under reduced pressure

Vorschrift

A stirred solution of 58.9 g (0.319 mole) of 2-biphenylmethanol and 6 ml of concentrated sulfuric acid in 67 ml of aqueous 48% hydrobromic acid was heated under reflux for 5 hours. The reaction mixture was cooled to ambient temperature, poured into ice-water, and the resulting mixture extracted with three portions of 100 ml each of diethyl ether. The combined extracts were washed with 50 ml of a saturated aqueous solution of sodium bicarbonate, then with 50 ml of water. The organic layer was dried with magnesium sulfate, filtered and the filtrate concentrated under reduced pressure to give 76.8 g of 2-(bromomethyl)biphenyl as a residual oil. The nmr and ir spectra were consistent with the proposed structure.

Quelle