[O:1]1[CH2:5][CH2:4][O:3][CH:2]1[C:6]1[S:7][C:8]([C:11](=[O:15])[CH2:12][O:13][CH3:14])=[CH:9][N:10]=1.O1CCCC1.C(O)C.[BH4-].[Na+]>O>[O:3]1[CH2:4][CH2:5][O:1][CH:2]1[C:6]1[S:7][C:8]([CH:11]([OH:15])[CH2:12][O:13][CH3:14])=[CH:9][N:10]=1To a solution of 1-[2-(1,3-dioxolan-2-yl)-1,3-thiazol-5-yl]-2-methoxyethanone (2.00 g) in a mixed solvent of tetrahydrofuran (10 mL) and ethanol (10 mL) was slowly added sodium borohydride (0.18 g) at 0° C., and the mixture was stirred at room temperature for 30 min. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, dried (MgSO4) and concentrated. The obtained residue was subjected to silica gel column chromatography, the title compound (1.84 g, yield 91%) was obtained as a colorless oil from a fraction eluted with ethyl acetate. MS: 232 (MH+).
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