Imidazole → 3-(((Tert-butyldimethylsilyl)oxy)methyl)-2-fluoro-4-iodopyridine

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To a solution of (2-fluoro-4-iodopyridin-3-yl)methanol (3.52 g, 13.91 mmol) in CH2Cl2 (80 mL) at room temperature was sequentially added imidazole (1.894 g, 27.8 mmol) and TBDMS-Cl (2.52 g, 16.69 mmol). The reaction was stirred at room temperature for 1 h before diethylether was added and the insoluble salts were filtered. Silica gel was added to the filtrate prior to the solvent removal under vacuum. The dry silica gel was packed, and the adsorbed product was purified by flash chromatography (hexane/EtOAc 10:0 to 7:3) to give 3-(((tert-butyldimethylsilyl)oxy)methyl)-2-fluoro-4-iodopyridine as a white solid (4.5 g). LC/MS m/z 368 [M+H]+.

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