N -( γ - またはδ - オキソアシル) オキサゾリジノンの還元反応

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タイトル別名
  • Reduction of N-(γ- or δ-oxoacyl)oxazolidinone
  • N-(g-マタハ d-オキソアシル)オキサゾリジノン ノ カンゲン ハンノウ

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抄録

We expected that treatment of optically active N-(γ- or δ-oxoacyl)oxazolidinone 6 or 7 with a reducing agent resulted in the formation of optically active lactone 9 or 11. Using borohydrides as a reducing agent, the corresponding lactone was given via the cyclization of intermediate 8. Unfortunately, enantioselectivity of the synthesized lactone was low. On the other hand, the reduction of 6 or 7 with diisobutylaluminum resulted in transformation into the corresponding tetrahydrofuran or pyran derivative 13 or 14, not the corresponding lactone or lactol. Considering this reaction mechanism, intermediate 16 can lose not an oxazolidinone anion but an aluminum oxide anion to give the iminium salt 17.

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