[CH:1]1([OH:7])[CH2:5][CH2:4][CH:3]([OH:6])[CH2:2]1.N1C=CN=C1.[Si:13](Cl)([C:16]([CH3:19])([CH3:18])[CH3:17])([CH3:15])[CH3:14].O>CN(C=O)C>[Si:13]([O:6][CH:3]1[CH2:4][CH2:5][CH:1]([OH:7])[CH2:2]1)([C:16]([CH3:19])([CH3:18])[CH3:17])([CH3:15])[CH3:14]To a solution of 1,3-cyclopentanediol (5 g, 49 mmol) and imidazole (5 g, 74 mmol) in DMF (20 mL) added tert-butyldimethylsilyl chloride (5.9 g, 39 mmol). The reaction stirred for 3 h at room temperature and was then poured into water and extracted with diethyl ether. The organic layer was washed with brine, dried over sodium sulfate, filtered, and concentrated. The residue was purified by column chromatography (10% diethyl ether:hexanes) to afford 3.5 g (33%) of the title compound. 1H NMR (300 MHz, CDCl3) δ 4.3-4.5 (m, 2H), 1.9-2.15 (m, 2H), 1.65-1.8 (m, 2H), 1.4-1.6 (m, 2H), 1.32-1.41 (m, 1H), 0.86 (s, 9H), 0.05 (s, 6H).
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