Sodium Chloride → 2-[3'-(2''-t-Butyldiphenylsiloxyethoxy)phenyl]-6-iodoimidazo[1,2-a]pyridine

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Reaction Conditions

Reaction Steps

300 mg (corresponding to 0.893 mmol) of 2-(3′-hydroxyphenyl)-6-iodoimidazo[1,2-a]pyridine was dissolved in 5.0 mL of dimethylformamide, and 370 mg (corresponding to 2.68 mmol) of potassium carbonate was added thereto. Then, 357 mg (corresponding to 0.982 mmol) of 1-bromo-2-(t-butyldiphenylsiloxy)ethane was added thereto. After the reaction mixture was stirred at 90° C. for 2 hours, a saturated sodium chloride aqueous solution was added, and extracted three times with ethyl acetate. The combined ethyl acetate layers were dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting crude product was purified by silica gel column chromatography (elution solvent: hexane/ethyl acetate=3/1) to obtain 477 mg (corresponding to 0.771 mmol) of 2-[3′-(2″-t-butyldiphenylsiloxyethoxy)phenyl]-6-iodoimidazo[1,2-a]pyridine (FIG. 8, Step 4).

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