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To a solution of 71 mg of 8-oxabicyclo[3.2.1]octan-3-one (which was prepared by the method as described in Bull. Chem. Soc. Jpn., 1978, 51, 2745-2746) in tetrahydrofuran (2 ml), 32 mg of lithium aluminium hydride was added in nitrogen atmosphere at 0° C., and stirred for 30 minutes at the same temperature. To the solution 300 mg of sodium sulfate decahydrate was added, followed by 15 hours' stirring at room temperature. The insoluble matter was removed by filtration, and the filtrate was concentrated under reduced pressure to provide 72 mg of the title compound.

1. waitfollowed by 15 hours
2. stirring' stirring at room temperature
3. customThe insoluble matter was removed by filtration
4. concentrationthe filtrate was concentrated under reduced pressure