Various bisflavylium dications have been prepared in an efficient four-step manner
utilizing the acid-mediated condensation between bis(arylethynylketones) and activated
phenols as the key step. Of special note is that phloroglucinol-type bisflavylium
salts have been obtained for the first time thanks to this procedure.
Key words
chromophores - condensation - flavylium - phenols - polycations