[H-].[Na+].[CH:3]1([OH:9])[CH2:7][CH2:6][CH:5]([OH:8])[CH2:4]1.[Si:10](Cl)([C:13]([CH3:16])([CH3:15])[CH3:14])([CH3:12])[CH3:11]>C1COCC1.C(OC(=O)C)C>[Si:10]([O:8][CH:5]1[CH2:6][CH2:7][CH:3]([OH:9])[CH2:4]1)([C:13]([CH3:16])([CH3:15])[CH3:14])([CH3:12])[CH3:11]Sodium Hydride (3.77 g, 0.094 mol, 60% in mineral oil) was added to a solution of 1,3-cyclopentanediol (9.62 g, 0.094 mol) in 100 mL of THF. A slight generation of gas was observed. After stirring at room temperature for 1 h, tert-butyldimethylsilyl chloride (14.2 g, 0.094 mol) was added and the mixture was stirred at room temperature over night. The reaction mixture was diluted with 500 mL of ethylacetate and washed with 125 mL of 10% K2CO3, brine, and dried over Na2SO4. The solution was concentrated and dried in vacuo to give 20.3 g of crude product as a colorless oil. Further purification over SiO2 using a gradient elution 5% EtOAc/hexanes to 10% EtOAc/hexanes provided the desired compound as a colorless oil (7.1 g, 35% yield).
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