Four-Step Route to Novel Bisflavylium Dications - First Synthesis of Phloroglucinol-Type Derivatives

[摘要]：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.

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