Reacción #2348084

Ecuación de reacción

4-propyl phenylboronic acid

1-bromo-3-fluorobenzene

potassium carbonate

→

3-fluoro-4′-propylbiphenyl

Rendimiento 80.6%

Disolventes

toluene

toluene

water

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturaheated
2. 2
   Temperaturaunder reflux for 2 hours
3. 3
   workup.ADDITIONmixed
4. 4
   Otroto be separated into two layers of an organic layer
5. 5
   ExtracciónExtraction into an organic layer
6. 6
   LavadoThe extracts were washed with water
7. 7
   Secadodried over anhydrous magnesium sulfate
8. 8
   ConcentraciónThe resulting solution was concentrated under reduced pressure
9. 9
   Otrothe residue was purified by means
10. 10
    Otroof fraction-collecting column chromatography
11. 11
    OtroThe solution was further purified by recrystallization from Solmix A-11
12. 12
    Otrodried

Procedimiento

Into a reaction vessel under an atmosphere of nitrogen, 4-propyl phenylboronic acid (T16; 200.0 g), 1-bromo-3-fluorobenzene (T8; 177.8 g), potassium carbonate (281.9 g), Pd(Ph3P)2Cl2 (7.2 g), toluene (600 ml), and Solmix A-11 (600 ml) were put and heated under reflux for 2 hours. After the reaction mixture had been cooled to 25° C., the solution was poured into water (2,000 ml) and toluene (1,000 ml), and mixed. The mixture was then allowed to stand to be separated into two layers of an organic layer and an aqueous layer. Extraction into an organic layer was carried out and the resulting organic layer was fractionated. The extracts were washed with water, and dried over anhydrous magnesium sulfate. The resulting solution was concentrated under reduced pressure, and the residue was purified by means of fraction-collecting column chromatography using heptane as the eluent and silica gel as the stationary phase powder. The solution was further purified by recrystallization from Solmix A-11 and then dried, whereby 175.5 g of 3-fluoro-4′-propylbiphenyl (T17) was obtained. The yield based on the compound (T8) was 80.3%.

Fuente