Isopropanol → 3-Chloro-4-ethoxy-2-fluoro-4'-(4-propylcyclohexa-1-enyl)biphenyl

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Reaction Conditions

Reaction Steps

6.0 g of the compound (16), 5.5 g of the compound (12), 5.9 g of potassium carbonate and 0.13 g of Pd(PPh3)2Cl2 were added to a reactor having 60 mL of IPA placed therein under nitrogen atmosphere. The mixture was stirred under refluxing and heating for 3 hours. After cooling the reaction mixture to 25° C., 200 mL of toluene and 200 mL of water were added thereto, and the resulting toluene solution was washed with a 2N sodium hydroxide aqueous solution, a saturated sodium bicarbonate aqueous solution and water. Thereafter, the solvent was removed by distillation to obtain a residue. The resulting residue was purified by recrystallization from a mixed solvent of toluene and ethyl acetate (toluene/ethyl acetate=1/1 by volume). The resulting crystals were purified by silica gel column chromatography using toluene as eluent, and then further purified by recrystallization from a mixed solvent of heptane and ethanol (heptane/ethanol=5/1 by volume) to obtain 5.9 g of 3-chloro-4-ethoxy-2-fluoro-4′-(4-propylcyclohexa-1-enyl)biphenyl (No. 130). The resulting compound (No. 130) was colorless crystals. The yield based on the compound (13) was 45.0%.

Provenance & Evidence