Reaktion #742263

Reaktionsgleichung

2-(2-pyridyl)imidazole

iodobenzene

Cs2CO3

→

1-phenyl-2(2-pyridyl)imidazole

Lösungsmittel

DMF

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeequipped with a magnetic stirrer and a reflux condenser
2. 2
   SonstigeThe mixture is degassed with N2 for 15 minutes at room temperature
3. 3
   Temperaturrefluxed under N2 in an oil bath for 24 hours
4. 4
   Filtrationsuction-filtered
5. 5
   Sonstigeto remove the solid byproduct
6. 6
   ExtraktionThe filtrate was extracted with EtOAc (3×100 mL)
7. 7
   WaschenThe combined organic layer was washed with H2O (2×100 mL)
8. 8
   Trocknenwith saturated NaCl (2×150 mL), and subsequently dried with anhydrous Na2SO4
9. 9
   SonstigeEvaporation of the solvent

Vorschrift

2-(2-pyridyl)imidazole (6.91 g), iodobenzene (1.47 g), Cs2CO3 (25 g), and copper powder (15 g) were mixed in 60 mL anhydrous DMF in a 250 mL round bottom flask equipped with a magnetic stirrer and a reflux condenser. The mixture is degassed with N2 for 15 minutes at room temperature and then refluxed under N2 in an oil bath for 24 hours. The resulting mixture was cooled to room temperature and suction-filtered to remove the solid byproduct. The filtrate was extracted with EtOAc (3×100 mL). The combined organic layer was washed with H2O (2×100 mL) and then with saturated NaCl (2×150 mL), and subsequently dried with anhydrous Na2SO4. Evaporation of the solvent gave crude 1-phenyl-2(2-pyridyl)imidazole. The crude product is generally pure enough to use in making redox mediators, although the crude product may be further purified using a silica gel column and eluting with MeOH/CHCl3.

Quelle