[F:1][C:2]1[CH:9]=[C:8]([OH:10])[CH:7]=[CH:6][C:3]=1[C:4]#[N:5].N1C=CN=C1.[CH3:16][C:17]([Si:20](Cl)([CH3:22])[CH3:21])([CH3:19])[CH3:18]>CN(C=O)C>[Si:20]([O:10][C:8]1[CH:7]=[CH:6][C:3]([C:4]#[N:5])=[C:2]([F:1])[CH:9]=1)([C:17]([CH3:19])([CH3:18])[CH3:16])([CH3:22])[CH3:21]2-Fluoro-4-hydroxybenzonitrile (30.1 g; manufactured by Wako Pure Chemical Industries, Ltd.) and imidazole (18.3 g; manufactured by Tokyo Chemical Industry Co., Ltd.) were dissolved in dehydrated DMF (436 mL; manufactured by Kanto Chemical Co., Inc.). After cooling to 0° C., TBDMSCl (48.3 g; manufactured by Tokyo Chemical Industry, Co., Ltd.) was added and the mixture was stirred for 1 hour while warming to room temperature. Solvent contained in the reaction solution was evaporated under reduced pressure. After adding water, extraction was carried out twice with ethyl acetate. The organic layer was washed twice with water and brine and dried over anhydrous sodium sulfate. After the solvent was evaporated under reduced pressure, purification was carried out with column chromatography (“COLUMN-A”; n-hexane:ethyl acetate=100:0→94:6) to obtain the title compound (40.3 g).
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