1,3-Diethynylbicyclo[1.1.1]pentane, a Useful Molecular Building Block
作者:Jiří Kaleta、Marek Nečas、Ctibor Mazal
DOI:10.1002/ejoc.201200351
日期:2012.9
that afford the corresponding dibromo and diiodo derivatives of DEBCP, which then successfully react with tert-C-cuprates derived from p- and m-dicarbadodecaboranes or bicyclopentanes. These umpolung reactions afforded a new class of molecular rods that combine carborane or bicyclo[1.1.1]pentane cages with ethynylene linkers. Many of the DEBCP derivatives were studied by single-crystal X-ray diffraction
Octacarbonyldicobalt and bis(dimethyl sulfide)decaborane B10H12(Me2S)2 were successfully added to 1,3-diethynylbicyclo[1.1.1]pentane in good yields. This is an interesting example of a cycloaddition reaction achieved next to the bicyclopentane cage that tends to rearrange in many other cases. It proves that both reagents attack the triple bond in a more or less concerted manner that prevents the rearrangement
八羰基二钴和双(二甲基硫醚)十硼烷B 10 H 12(Me 2 S)2已成功添加到1,3-二乙炔基双环[1.1.1]戊烷中。这是在双环戊烷笼子旁边实现的环加成反应的一个有趣例子,在许多其他情况下,该笼子倾向于重排。证明了这两种试剂或多或少地协同作用攻击了三键,从而防止了重排。后一反应的产物特别令人感兴趣,因为双环戊烷和邻-碳硼烷的笼子立即以其杆状结构连接。这样就构成了新型的分子转子。1 H和13溶液中的C核磁共振波谱揭示了具有明确定义的几何结构的分子的平均旋转对称性,这在几个示例中已通过X射线结构分析得到了证实。