Reaktion #997138

Reaktionsgleichung

2-naphthalene boronic acid

4-bromoiodobenzene

sodium carbonate

→

2(4-bromophenyl)naphthalene

Ausbeute 67.0%

Lösungsmittel

toluene

toluene

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeAfter the reaction in the mixture
2. 2
   workup.DISTILLATIONwas distilled away
3. 3
   workup.ADDITIONthe mixture was added with methanol, such that precipitated solid
4. 4
   Sonstigewas separated by filtration
5. 5
   SonstigeBy recrystallizing the obtained solid by acetic ether and methanol
6. 6
   Sonstigesubsequently drying the solid

Vorschrift

Under an argon gas atmosphere, 70.0 g (407 mmol) of 2-naphthalene boronic acid, 115.1 g (407 mmol 1) of 4-bromoiodobenzene, 9.40 g (8.14 mmol) of tetrakis(triphenylphosphine)palladium(0), 1.2 L of toluene and 600 ml of 2M sodium carbonate solution were mixed, and stirred for 20 hours at 90 degrees C. After the reaction in the mixture was over, toluene was distilled away therefrom, and the mixture was added with methanol, such that precipitated solid was separated by filtration. By recrystallizing the obtained solid by acetic ether and methanol and subsequently drying the solid, 77.2 g of 2(4-bromophenyl)naphthalene was obtained with an yield of 67%.

Quelle