Alkynes as Linchpins for the Additive Annulation of Biphenyls: Convergent Construction of Functionalized Fused Helicenes
作者:Rana K. Mohamed、Sayantan Mondal、Joseph V. Guerrera、Teresa M. Eaton、Thomas E. Albrecht‐Schmitt、Michael Shatruk、Igor V. Alabugin
DOI:10.1002/anie.201606330
日期:2016.9.19
A new approach to fused helicenes is reported, where varied substituents are readily incorporated in the extended aromatic frame. From the alkynyl precursor, the final helical compounds are obtained under mild conditions in a two‐step process, in which the final C−C bond is formed via a photochemical cyclization/ dehydroiodination sequence. The distortion of the π‐system from planarity leads to unusual
报道了一种新的稠合螺旋烯的方法,其中各种取代基很容易掺入扩展的芳族骨架中。从炔基前体在两个步骤的过程中,在温和条件下获得最终的螺旋化合物,其中最终的C-C键是通过光化学环化/脱氢碘化序列形成的。π系统因平面度而导致的变形会导致固态堆积异常。计算分析表明,取代基的掺入会扰乱这些非平面芳烃的几何形状和电子结构。