Efficient Synthesis of 3,4-Ethylenedioxythiophene (EDOT)-Based Functional π-Conjugated Molecules through Direct C-H Bond Arylations

A variety of 3,4-ethylenedioxythiophene (EDOT)-based pi-conjugated molecules were efficiently synthesized in good yields through Pd-catalyzed direct C-H bond arylations, wherein a detailed synthetic investigation, including the screening of various kinds of palladium catalysts, ligands, additives, and solvents, was carried out. In addition, the spectroscopic and electrochemical properties of these EDOT-containing molecules were also investigated.