Abstract: Aryl-substituted thiophenes are important fine chemicals and can constitute ubiquitous fragments of the active semiconducting layer in organic field effect transistors(OFETs). Among the variety of useful methods for the synthesis of these kinds of compounds, palladium-catalyzed Suzuki cross-coupling reaction received more researchers’ attentions. Cyclopalladated ferrocenylimines catalyzed Suzuki cross-coupling reaction of aryl iodides, bromides with 3-thienylboronic acid was carried out in DMF at 80 ℃ in the presence of K₃PO₄ and without the protection of inert gas. This method has the advantage of low loadings both of catalyst and 3-thienylboronic acid, simple and easy handling procedure. By using this method the synthesis of 3-arylthiophenes could be readily achieved. The emission and excitation spectra of compounds 3b, 3c, 3d confirmed that 3-arylsubstituted thiophenes were a kind of potential organic LEDs materials.

Key words: Cyclopalladated ferrocenylimine, Suzuki reaction, 3-Thienylboronic acid, 3-Aryl thiophenes, Emission spectrum, Excitation spectrum