Cesium fluoride (1.24 g), cis-propenylboronic acid (1.54 g) and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium (II) (0.49 g) were added to a mixed solution of 4-[1,1,1,3,3,3-hexafluoro-2-(methoxymethyl)oxypropan-2-yl]-2-iodo-6-propylphenol (2.83 g, 5.99 mmol) in toluene (60 mL) in an argon atmosphere at room temperature, followed by stirring overnight. After completion of the reaction, the reaction solution was extracted with ethyl acetate-water, and the organic layer was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=10:1) to obtain 4.20 g of the title compound (yield: 85%) as a brown solid.
