Реакция #43211

Уравнение реакции

fluoro-4-iodo pyridine

formylphenylboronic acid

Potassium carbonate

water

→

desired product

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

Растворители

THF

Условия реакции

Обработка

1. 1
   ДругоеThe flask was purged with nitrogen
2. 2
   Температураthe mixture heated to 65 C for 4 hours
3. 3
   ДругоеThe solvent was removed by rotary evaporation
4. 4
   Другоеthe residue partitioned between ethyl acetate and water
5. 5
   ДругоеRemoval of the ethyl acetate
6. 6
   Другоеgave a residue which
7. 7
   Другоеwas chromatographed on silica gel (1:1 ethyl acetate hexanes)

Методика

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.

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