Synthesis and Structural Analysis of Substituted Tripod-Shaped Tri- and Tetra(p-phenylene)s
作者:Jesús Hierrezuelo、Elena Guillén、J. Manuel López-Romero、Rodrigo Rico、M. Rosa López-Ramírez、J. Carlos Otero、Chengzhi Cai
DOI:10.1002/ejoc.201000786
日期:2010.10
Suzuki cross-coupling reaction of the silicon-derived core molecule with the appropriately substituted p-biphenyl moiety. This synthesis should be considered a new strategy for these compounds, as iterative coupling of the substituted p-biphenyl building blocks with the first-generation tripods will allow the homologation of the tripod legs to obtain giant tripod-shaped oligo(p-phenylene)s. Also, the
我们在这里报告了几种三脚架形低聚(对亚苯基)的合成,腿由三个或四个亚苯基单元组成。每条腿都用碘原子或 TMS 或羧基封端,并且功能臂上存在乙氧基。含有甲基三(乙二醇)侧链的三脚架专为生物应用而设计。合成的关键步骤是 Pd 催化的硅衍生核心分子与适当取代的对联苯部分的 Suzuki 交叉偶联反应。这种合成应被视为这些化合物的新策略,因为取代的对联苯构件与第一代三脚架的迭代耦合将允许三脚架腿的同源性获得巨大的三脚架形低聚(对亚苯基) . 还,功能臂上带有乙氧基的碘封端腿允许三脚架的模块化设计以进一步功能化,这将定义三脚架纳米结构表面的应用。通过实验(拉曼光谱)和理论(DFT 计算)方法研究了一些合成三脚架的结构。