Preparation of Intermediates for the Synthesis of Polycyclic Alkaloids: A New Access to the Azabicyclic Core of theStemona Alkaloids
作者:Pau Cid、Montserrat Closa、Pedro de March、Marta Figueredo、Josep Font、Elena Sanfeliu、Angeles Soria
DOI:10.1002/ejoc.200400322
日期:2004.10
Several isoxazolidines, derived from the 1,3-dipolar cycloaddition of α,β-hexenolides to cyclic nitrones, were converted into the corresponding piperidine- and pyrrolidine-oxepinones by reduction of the nitrogen−oxygen bond. The potential of the resulting amino alcohols as synthetic precursors of polycyclic alkaloids was explored. These intermediates provide a new access to the 1-azabicyclo[5.3.0]decane
几种异恶唑烷,衍生自 α,β-己烯内酯与环硝酮的 1,3-偶极环加成,通过还原氮-氧键转化为相应的哌啶-和吡咯烷-氧杂酮。探索了所得氨基醇作为多环生物碱合成前体的潜力。这些中间体为百部生物碱的 1-氮杂双环 [5.3.0] 癸烷核心提供了新的途径。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)