Ring-Rearrangement Metathesis of 7-Azanorbornenes as an Entry to 1-Azabicyclo[<i>n</i>.3.0]alkenones
作者:Víctor Rojas、Javier Carreras、Alberto Avenoza、Jesús H. Busto、Jesús M. Peregrina
DOI:10.1002/ejoc.201300126
日期:2013.6
nitrogen position. By using this methodology, we have synthesized a set of new 1-azabicyclo[n.3.0]alkenones, which include derivatives of pyrrolam. In all cases, only one regioisomer was obtained. Moreover, new spiro compounds with tricyclic structures have been synthesized by using a domino metathesis process that involves a ring-opening/ring-closing/ring-closing metathesis (ROM/RCM/RCM) sequence
吡咯里西啶、吲哚里西啶和吡咯并[1,2-a]氮杂亚结构存在于大量天然存在的氮杂双环化合物中,这些化合物由于其生物活性而目前受到特别关注。为了获得这类化合物,我们设想了一种 7-氮杂降冰片烯系统的环重排复分解 (RRM) 过程,该过程在氮位置结合了几种环外烯烃模式。通过使用这种方法,我们合成了一组新的 1-氮杂双环 [n.3.0] 烯酮,其中包括吡咯烷的衍生物。在所有情况下,仅获得一种区域异构体。此外,通过使用涉及开环/闭环/闭环复分解 (ROM/RCM/RCM) 序列的多米诺复分解过程合成了具有三环结构的新型螺环化合物。