[H-].[Al+3].[Li+].[H-].[H-].[H-].[O:7]1[C@@H:11]2[O:12][CH2:13][CH2:14][C@H:10]2[C:9](=[O:15])[CH2:8]1.O.[OH-].[Na+]>C1COCC1>[O:7]1[C@@H:11]2[O:12][CH2:13][CH2:14][C@@H:10]2[C@H:9]([OH:15])[CH2:8]1To a suspension of lithium aluminum hydride (15 mg) dispersed in THF (0.2 mL) was added dropwise a solution of (3aR,6aS)-hekahydrofuro[2,3-b]furan-3-on (64 mg) obtained in Example 28 in THF (0.5 mL) at 0° C. and the mixture was stirred for 1 hr. Water (0.1 mL), 15% aqueous sodium hydroxide solution (0.1 mL) and water (0.3 mL) were successively added to the reaction mixture every 30 min and the mixture was filtered and washed well with THF. The filtrate was dried over anhydrous magnesium sulfate, filtered and the solvent was evaporated to give the title compound (57 mg, 88% ee) as an oil, which was an almost pure anti-form. The spectrum data were the same as those in Example 27.
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