Reaktion #43211

Reaktionsgleichung

fluoro-4-iodo pyridine

formylphenylboronic acid

Potassium carbonate

water

→

desired product

3-(2-Fluoro-pyridin-4-yl)-benzaldehyde

Lösungsmittel

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe flask was purged with nitrogen
2. 2
   Temperaturthe mixture heated to 65 C for 4 hours
3. 3
   SonstigeThe solvent was removed by rotary evaporation
4. 4
   Sonstigethe residue partitioned between ethyl acetate and water
5. 5
   SonstigeRemoval of the ethyl acetate
6. 6
   Sonstigegave a residue which
7. 7
   Sonstigewas chromatographed on silica gel (1:1 ethyl acetate hexanes)

Vorschrift

2 fluoro-4-iodo pyridine (5 g), 3 formylphenylboronic acid (4 g), and palladium tetrakis triphenylphosphine were suspended in 500 mL of THF. Potassium carbonate (7.42 g) was added along with 50 mL of water. The flask was purged with nitrogen and the mixture heated to 65 C for 4 hours. The solvent was removed by rotary evaporation and the residue partitioned between ethyl acetate and water. Removal of the ethyl acetate gave a residue which was chromatographed on silica gel (1:1 ethyl acetate hexanes) to give the desired product. Yield: 1.42 g. LC-MS showed the product had the expected M+H+ of 202.

Quelle