15645-07-5

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• 88-15-3 2-Acetylthiophene 
• 623-27-8 terephthalaldehyde, 
• 4612-26-4 1,4-Phenyldiboronic acid 
• 1360589-29-2 3-methoxy-2,6-di(2-thienyl)pyrid-4-yl nonaflate 

Relevant academic research and scientific papers

Synthesis and properties of branched oligo(2-thienyl)- and oligo(2,2′-bithien-5-yl)-substituted pyridine derivatives

Starting from easily accessible precursors we describe the preparation of a series of branched oligo(2-thienyl)- and oligo(2,2′-bithienyl)- substituted pyridine derivatives. With palladium-catalyzed cross-coupling reactions of pyridyl nonaflates/triflates as key steps we synthesized 2,6-di(2-thienyl)pyridines bridged by thiophene or benzene rings. By selective bromination of 2,6-di(2-thienyl)pyridine and 2,4,6-tri(2-thienyl)pyridine and subsequent coupling reactions an access to oligo(2,2′-bithien-5-yl)- substituted pyridine derivatives was gained. The constitution and solid state conformation of 2,6-bis(2,2'-bithien-5-yl)pyridine was determined by X-ray analysis. This series of new pyridine-thiophene conjugates was systematically investigated by UV/vis spectroscopy. Large Stokes shifts in the neutral and protonated form were observed. The electrochemical oxidation of two typical compounds was studied, however, these oxidations were irreversible forming a polymeric film at the anode. As a selected example, a thiophene-bridged 2,6-di(2-thienyl)pyridine derivative was also investigated by scanning tunneling microscopy showing an interesting self-assembly into a highly ordered monolayer on highly oriented pyrolytic graphite. Copyright

Solvent-free synthesis of new 2,4,6-triarylpyridines catalyzed by a Bronsted acidic ionic liquid as a green and reusable catalyst

Some new 4-(aryl)-2,6-di-2-naphthylpyridines and 4-(aryl)-2,6-di-2- thienylpyridines have been prepared through three-component condensation of 2-acetylnaphthalene or 2-acetylthiophene, aromatic aldehydes, and ammonium acetate in presence of 1-(4-sulfonyl