반응 #2348084

반응 방정식

4-propyl phenylboronic acid

1-bromo-3-fluorobenzene

potassium carbonate

→

3-fluoro-4′-propylbiphenyl

수율 80.6%

용매

toluene

toluene

water

반응 조건

후처리

1. 1
   온도heated
2. 2
   온도under reflux for 2 hours
3. 3
   workup.ADDITIONmixed
4. 4
   기타to be separated into two layers of an organic layer
5. 5
   추출Extraction into an organic layer
6. 6
   세척The extracts were washed with water
7. 7
   건조dried over anhydrous magnesium sulfate
8. 8
   농축The resulting solution was concentrated under reduced pressure
9. 9
   기타the residue was purified by means
10. 10
    기타of fraction-collecting column chromatography
11. 11
    기타The solution was further purified by recrystallization from Solmix A-11
12. 12
    기타dried

실험 절차

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%.

출처