Synthesis of Water‐Soluble Blue‐Emissive Tricyclic 2‐Aminopyridinium Salts by Three‐Component Coupling‐(3+3)‐Anellation
作者:Olga Bakulina、Franziska K. Merkt、Tim‐Oliver Knedel、Christoph Janiak、Thomas J. J. Müller
DOI:10.1002/anie.201808665
日期:2018.12.21
The (3+3) anellation of alkynones and cyclic amidines is a novel and unexpected approach to generate intensively blue luminescent tricyclic 2‐aminopyridinium salts with quantum yields Φf up to 63 % in water. By implementation into a consecutive three‐component reaction, these title compounds are obtained rapidly and efficiently in a diversity‐oriented fashion. Most interestingly, these bi‐ and tricyclic