Réaction #2044990

Équation de réaction

2-(1H-imidazol-2-yl)pyridine

iodobenzene

Cs2CO3

→

2-(1-phenyl-1H-imidazol-2-yl)pyridine

Solvants

DMF

Conditions de réaction

Traitement

1. 1
   Autreequipped with a magnetic stirrer and a reflux condenser
2. 2
   AutreThe mixture was degassed with N2 for 15 minutes at room temperature
3. 3
   Températurerefluxed under N2 in an oil bath for 24 hours
4. 4
   Filtrationsuction-filtered
5. 5
   Autreto remove the solid byproduct
6. 6
   ExtractionThe filtrate was extracted with EtOAc (3×100 mL)
7. 7
   LavageThe combined organic layers were washed with H2O (2×100 mL)
8. 8
   Séchagewith saturated NaCl (2×150 mL), and subsequently dried with anhydrous Na2SO4
9. 9
   AutreEvaporation of the solvent

Mode opératoire

2-(1H-imidazol-2-yl)pyridine (6.91 g), iodobenzene (11.47 g), Cs2CO3 (25 g), and copper powder (15 g) were combined in 60 mL anhydrous DMF in a 250 mL round bottom flask equipped with a magnetic stirrer and a reflux condenser. The mixture was 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 layers were washed with H2O (2×100 mL), then with saturated NaCl (2×150 mL), and subsequently dried with anhydrous Na2SO4. Evaporation of the solvent gave crude 2-(1-phenyl-1H-imidazol-2-yl)pyridine. 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.

Source