Reaktion #74693

Reaktionsgleichung

acetic acid

nitric acid

parapropyl benzoic acid

bromine

→

4-propyl-3-bromo-benzoic acid

Lösungsmittel

water

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.WAITThen, at a temperature of 25° C., and over a period of half an hour
2. 2
   Sonstigewas removed by filtration
3. 3
   Waschenrinsed until neutral
4. 4
   workup.DISSOLUTIONThereafter, the acid was dissolved in ethanol
5. 5
   SonstigeRecrystallization from hexane

Vorschrift

To a mixture of 150 ml of glacial acetic acid, 33 ml of concentrated nitric acid and 25 ml of water, were added 8.2 g (0.05 moles) of parapropyl benzoic acid and 8.8 g (0.055 moles) of bromine. Then, at a temperature of 25° C., and over a period of half an hour, a solution of 8.5 g (0.05 moles) of silver nitrate in 25 cc of water was added. The solution was stirred for three hours, thirty minutes following which the suspended solid was removed by filtration and rinsed until neutral. Thereafter, the acid was dissolved in ethanol. Recrystallization from hexane yielded 4-propyl-3-bromo-benzoic acid.

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