Diketopyrrolopyrrole (DPP) is an important type of π-conjugated building block for high-performance organic electronic materials. DPP-based conjugated materials are usually synthesized via Suzuki, Stille, or Negishi cross-coupling reactions, which require organometallic precursors. In this paper, a series of novel phenyl-cored DPP molecules, including five meta-phenyl-cored molecules and four para-phenyl-cored molecules, have been synthesized in moderate to good yields, in a facile manner, through the Pd-catalyzed direct arylation of C–H bonds, and their optoelectrical properties have been investigated in detail. All new molecules have been fully characterized by NMR, MALDI-TOF MS, elemental analysis, UV–visible spectroscopy, and cyclic voltammetry. This synthetic strategy has evident advantages of atom- and step-economy and low cost, compared with traditional cross-coupling reactions.
Diketopyrrolopyrrole(DPP)是高性能有机电子材料中重要的π-共轭建筑块之一。基于DPP的共轭材料通常通过Suzuki、Stille或Negishi交叉偶联反应合成,这些反应需要有机金属前体。在本文中,通过Pd催化的C-H键直接芳基化反应,以简便的方式,以中等至良好的产率合成了一系列新型苯基核心的DPP分子,包括五种间位苯基核心分子和四种对位苯基核心分子,并对它们的光电性能进行了详细研究。所有新分子均通过NMR、MALDI-TOF MS、元素分析、紫外可见光谱和循环伏安法得到了充分表征。与传统的交叉偶联反应相比,这种合成策略具有明显的原子和步骤经济性以及低成本的优势。