[O:1]([CH2:9][CH2:10][CH2:11][CH2:12]/[CH:13]=[C:14](\[CH3:20])/[C:15](OCC)=[O:16])[Si:2]([C:5]([CH3:8])([CH3:7])[CH3:6])([CH3:4])[CH3:3].[H-].C([Al+]CC(C)C)C(C)C.CCCCCC.CO.O.O.O.O.O.O.O.O.O.O.S([O-])([O-])(=O)=O.[Na+].[Na+]>C(Cl)Cl>[O:1]([CH2:9][CH2:10][CH2:11][CH2:12]/[CH:13]=[C:14](\[CH3:20])/[CH2:15][OH:16])[Si:2]([C:5]([CH3:7])([CH3:8])[CH3:6])([CH3:4])[CH3:3]To a methylene chloride solution (200 ml) of Ester 4 (15.84 g; 0.0528 mol), a 0.95 M diisobutylaluminiumhydride-hexane solution (139 ml; 0.132 mol) is added at 0° C. and the whole is stirred for 1 hour. After stirring, methanol (7 ml; 0.160 mol) and sodium sulfate decahydrate (68.0 g; 0.211 mol) are added thereto and the whole is stirred at room temperature for 30 min. Sodiumsulfatedecahydrate is filtered using Chloroform (21), and the solvent is distilled off under reduced pressure to produce Alcohol 5 (13.60 g; 0.0528 mol) of 100% in yield.
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