1-[3-({[tert-Butyl(dimethyl)silyl]oxy}methyl)-2-fluorophenyl]piperazine (500 mg) was mixed with dioxane (15 ml), and methyl 5-bromopyridine-2-carboxylate (399 mg), palladium acetate (35 mg), 2-dicyclohexylphosphino-2′,4′,6′-tri-isopropyl-1,1′-biphenyl (147 mg), and potassium phosphate (981 mg) were added thereto, followed by stirring at 100° C. for 48 hours. The reaction mixture was cooled to room temperature, and filtered by the addition of CHCl3 and Celite, and the filtrate was concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (EtOAc/hexane) to obtain methyl 5-{4-[3-({[tert-butyl(dimethyl)silyl]oxy}methyl)-2-fluorophenyl]piperazin-1-yl}pyridine-2-carboxylate (310 mg).
