[Br:1][C:2]1[N:3]([CH2:10][CH:11]([O:21][CH:22]2[CH2:27][CH2:26][CH2:25][CH2:24][O:23]2)[CH2:12][O:13][Si](C(C)(C)C)(C)C)[CH:4]=[C:5]([N+:7]([O-:9])=[O:8])[N:6]=1.O1CCCC1.[F-].C([N+](CCCC)(CCCC)CCCC)CCC>O1CCCC1>[Br:1][C:2]1[N:3]([CH2:10][CH:11]([O:21][CH:22]2[CH2:27][CH2:26][CH2:25][CH2:24][O:23]2)[CH2:12][OH:13])[CH:4]=[C:5]([N+:7]([O-:9])=[O:8])[N:6]=1To tetrahydrofuran (120 ml) solution of 2-bromo-1-[3-(t-butyldimethylsilanyloxy)-2-(tetrahydropyran-2-yloxy)propyl)-4-nitroimidazole (12.7 g) prepared in Example 28, was added 1M tetra-n-butylammonium fluoride tetrahydrofuran solution (30 ml) under stirring and ice-cooling condition, the reaction mixture was stirred at a room temperature overnight. The reaction mixture was concentrated under a reduced pressure and the residue was diluted with ethyl acetate, washed with water and an aqueous solution being saturated with sodium chloride. After being dried over anhydrous magnesium sulfate, the residue was concentrated under a reduced pressure, thus obtained residue was purified by use of a silica gel column chromatography (eluent: dichloromethane/ethyl acetate=10/1), there was obtained 2-bromo-1-[3-hydroxy-2-(tetrahydropyran-2-yloxy)propyl]-4-nitroimidazole (8.51 g, yield: 89%) as colorless liquid product.
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