[O:1]([CH2:19][CH2:20][O:21][C:22]1[CH:23]=[C:24]([C:28]2[N:29]=[C:30]3[CH:35]=[CH:34][C:33]([I:36])=[CH:32][N:31]3[CH:37]=2)[CH:25]=[CH:26][CH:27]=1)[Si](C(C)(C)C)(C1C=CC=CC=1)C1C=CC=CC=1.[F-].C([N+](CCCC)(CCCC)CCCC)CCC.[Cl-].[NH4+].O>O1CCCC1.C(#N)C>[OH:1][CH2:19][CH2:20][O:21][C:22]1[CH:23]=[C:24]([C:28]2[N:29]=[C:30]3[CH:35]=[CH:34][C:33]([I:36])=[CH:32][N:31]3[CH:37]=2)[CH:25]=[CH:26][CH:27]=1
477 mg (corresponding to 0.771 mmol) of 2-[3′-(2″-t-butyldiphenylsiloxyethoxy)phenyl]-6-iodoimidazo[1,2-a]pyridine was dissolved in 0.98 mL of tetrahydrofuran, and 0.93 mL of a 1.0 mol/L tetrahydrofuran solution of tetrabutylammoniumfluoride was added thereto. After the reaction mixture was stirred at room temperature for 15 minutes, ammonium chloride solution was added followed by addition of 5.0 mL of water and 2.0 mL of acetonitrile to filter precipitates. The filtered precipitates were washed with water and acetonitrile in this order to obtain 120 mg (corresponding to 0.316 mmol) of 2-[3′-(2″-hydroxyethoxy)phenyl]-6-iodoimidazo[1,2-a]pyridine (FIG. 2-8, Step 5).
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