Isopropanol → 3-Fluoro-4'-(4-propylcyclohexyl)biphenyl-4-ol

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Dichlorobistriphenylphosphinepalladium (0.143 g) was added to a mixture of 4-(4-propylcyclohexyl)phenylboronic acid (10.0 g), 2-fluoro-4-bromophenol (7.76 g), potassium carbonate (11.2 g) and isopropyl alcohol (90 ml) under a stream of nitrogen, and the mixture was heated to reflux at 70° C. for 4 hours. The reaction mixture was poured into water, which was extracted with diethyl ether. The extract was washed with water three times and the solvent was distilled off. The residue was purified by silica gel-column chromatography (solvent: toluene/ethyl acetate=10/1 by volume), and then by recrystallization-filtration (solvent: toluene/heptane=0.5/2 by volume) to give colorless crystals of 3-fluoro-4′-(4-propylcyclohexyl)biphenyl-4-ol (7.0 g, GC purity: 95%).

Herkunft & Nachweise