An efficient synthetic approach towards new 5,5'-diaryl-2,2'-bipyridine-based fluorophores

An efficient approach has been developed for the synthesis of 5,5′-diaryl-2,2′-bipyridines via their 1,2,4-triazine analogues. The notable advantages of the present method are: The possibility of varying the aromatic substituents in the positions 5 and 5′ of bipyridine core and the possibility for obtaining 2,2′-bipyridines bearing a fused cyclopentene core to increase the solubility in organic solvents.