Expeditious synthesis of N-bridged heterocycles via dipolar cycloaddition of pentafulvenes with 3-oxidopyridinium betaines
作者:Jinesh M. Kuthanapillil、Sreeja Thulasi、Rani Rajan、K. Syam Krishnan、E. Suresh、K.V. Radhakrishnan
DOI:10.1016/j.tet.2010.11.084
日期:2011.2
A new and highly versatile approach towards the synthesis of bicyclo[6.3.0]undecanes and bicyclo[5.3.0]decanes was accomplished. The methodology adopted involved [6+3] and [3+2] cycloaddition reactions of pentafulvenes with 3-oxidopyridinium betaines generated either by the action of a base on the pyridinium salt or thermally from pyridinium betaine dimer. These well-functionalized bicyclo[6.3.0]undecanes
完成了一种新的,用途广泛的合成双环[6.3.0]十一烷和双环[5.3.0]癸烷的方法。所采用的方法学涉及五氟丁苯与3-氧化吡啶鎓甜菜碱的[6 + 3]和[3 + 2]环加成反应,该甜菜碱通过在吡啶鎓盐上的碱作用或吡啶鎓甜菜碱二聚体的热作用生成。这些功能良好的双环[6.3.0]十一烷和双环[5.3.0]癸烷提供了广泛的合成选择,可以预期将其转化为多种快速有效的天然产物合成方法。