1,3-Dipolar Cycloaddition of Nitrones with 5-Methylenehydantoins: Synthesis and Transformation of New Spirohydantoin Derivatives
作者:Amira Bahy、Yakdhane Kacem、Béchir Ben Hassine
DOI:10.1080/00397910903097237
日期:2010.4.12
1,3-Dipolar cycloaddition of various acyclic nitrones with 5-methylenehydantoin derivatives afforded new chiral spiroadducts in good yields. All the spirohydantoins were obtained through a regio- and stereospecific pathway, and the spirocarbon atom was linked to the isoxazolidine oxygen atom. A representative example of the reduction of the spirohydantoin 8 with Zn/AcOH led to the substituted 1,3-aminoalcohol
各种无环硝酮与 5-亚甲基乙内酰脲衍生物的 1,3-偶极环加成以良好的收率提供了新的手性螺旋管。所有螺乙内酰脲均通过区域和立体特异性途径获得,螺碳原子与异恶唑烷氧原子相连。用 Zn/AcOH 还原螺乙内酰脲 8 的代表性例子导致取代的 1,3-氨基醇乙内酰脲 20。