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

在之前的研究中，我了解到在 FeCl2 和 PPh3 作为催化剂、镁/LiCl 作为还原剂和 1,2-二氯丙烷作为温和氧化剂的存在下，反应通过有机金属中间体发生，同时形成染色的 1,4-二氢戊二烯骨架。然后，我使用具有更高水平 HOMO 能量的铁催化串联四环策略扩展了更多共轭二噻吩的合成。此外，成熟的铁催化环化碳镁化方法非常适用于合成衍生的1H-茚、二氢-s-二茚和具有螺环中心的碳桥低聚对亚苯基亚乙烯同系物，这表明我们有前瞻性地构建具有多螺环中心的扩展1,4-二氢戊二烯骨架。

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.