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[摘要]:The intramol. nitrile oxide-alkene cycloaddn. was studied in an enediyne system. It is an efficient method for the 1-step synthesis of isoxazoline-fused bicyclic enediynes. The thermal reactivity of these enediynes is similar to the isoxazolidine-fused counterparts, thus ruling out any significant effect by the bridgehead double bond. |
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