Ethyl Acetate → (4S, 4aR, 6R)-6-Acetyl-4,4a-dimethyl-4,4a,5,6,7,8-hexahydro-3H-naphthalen-2-one

関与物質

反応手順

Nootkatone (250 mg) was dissolved in DMF (15 mL), and OsO4 (0.14 mL, 2.5% in tBuOH) was added and stirred for 5 min. OXONE (1.40 g) was added in one portion and the reaction had a final volume (18 mL). The reaction was stirred at room temperature for 3 hours or until the solution becomes colorless. This usually marks the completion of the reaction which was verified by TLC or GC. Na2SO3 (3.0 g) was added, to reduce the remaining Os(VIII), and stirred for an additional hour or until solution became dark brown/black. EtOAc was added to extract the products and 1N HCl was used to dissolve the salts. The organic extract was washed with 1N HCl (100 mL×3) and brine (100 mL), dried over Na2SO4, and the solvent was removed under reduced pressure to obtain the crude product. (4S, 4aR, 6R)-6-Acetyl-4,4a-dimethyl-4,4a,5,6,7,8-hexahydro-3H-naphthalen-2-one was obtained in 60% yield after purification by silica gel column chromatography.

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