quaternary centers were synthesized in moderate to good yields by treatment of various hexahydro-3,4-dioxa-8a-aza-as-indacen-2-ones with m-CPBA under basic conditions through a tandem Cope elimination/1,3-dipolar cycloaddition reaction sequence, followed by N-O cleavage and lactam ring cyclization.
通过在碱性条件下通过串联处理各种六氢 3,4-dioxa-8a-aza-as-indacen-2-ones 与 m-CPBA,以中等至良好的收率合成了含有连续四元中心的高度官能化的手性
呋喃吡咯烷酮Cope消除/1,3-偶极环加成反应序列,然后是NO裂解和内酰胺环环化。