Development of base-metal-catalyzed reactions applicable for new design of organic semiconductor materials

在以前的研究中，我了解到在FeCl 2和PPh 3作为催化剂，镁/LiCl作为还原剂和1，2-二氯丙烷作为温和的氧化剂的存在下，反应通过有机金属中间体发生，而形成染色的1，4-二氢并环戊二烯框架。在此基础上，利用高HOMO能级的铁催化的串联四环化反应策略，进一步拓展了共轭二噻吩类化合物的合成。此外，铁催化的环状碳镁化反应在合成1H-茚衍生物、二氢-s-引达省衍生物和碳桥低聚对亚苯基亚乙烯基衍生物方面具有很好的应用前景，这为我们构建具有多个螺环中心的1，4-二氢并环戊二烯衍生物提供了很好的基础。

In previous study I learned in the presence of FeCl2 and PPh3 as catalyst, magnesium/LiCl as a reductant and 1,2-dichloropropane as a mild oxidant, reaction occurred via an organometallic intermediate whereas the stained 1,4-dihydropentalene framework was formed. Then I extended the synthesis for more conjugated dithiophenes using iron-catalyzed tandem tetra-annulation strategy with much higher level of HOMO energy. Besides, well-developed iron-catalyzed annulative carbomagnesiation method was found to be highly applicable for synthesizing derivatized 1H-indenes, dihydro-s-indacenes, and carbon-bridged oligo p-phenylenevinylene congeners with spiro centers, which suggests us prospective work to construct an extended 1,4-dihydropentalene framework with multi-spiro-centers.