[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12](Br)=[C:11]([F:16])[CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.O1CCOCC1.[I-:23].[Na+].CNCCNC>[Cu](I)I.C(OCC)(=O)C.O>[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([I:23])=[C:11]([F:16])[CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1To a mixed solution of 4-(benzyloxy)-1-bromo-2-fluorobenzene (187 g, 665 mmol) described in Production Example 1-2-4 and 1,4-dioxane (300 mL) were added copper iodide (I) (12.6 g, 66.1 mmol), sodium iodide (200 g, 1.33 mol) and N,N′-dimethylethylenediamine (14.0 mL, 132 mmol) at room temperature, and the resultant mixture was stirred under a nitrogen atmosphere at 110 to 115° C. for 19 hours. The reaction mixture was cooled to room temperature, then water and ethyl acetate were added to the reaction mixture, the resultant mixture was filtrated using Celite, and a filtrate was partitioned between aqueous layer and organic layer. The aqueous layer was extracted with ethyl acetate. The combined organic layers were filtrated using a glass filter having silica gel laid thereon. The silica gel was washed with ethyl acetate, organic layers obtained were combined, and the solvent was evaporated under a reduced pressure. The resultant residue was purified by silica gel column chromatography (heptane:ethyl acetate=7:1 and then 4:1) to give the title compound (195 g, yield: 89%).
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