期刊
ORGANIC CHEMISTRY FRONTIERS
卷 10, 期 19, 页码 4800-4808出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d3qo00923h
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A sustainable synthetic protocol for the construction of color-tunable fluorescent molecules has been achieved via ruthenium-catalyzed multiple C-H activation/annulation. The strategy provides easy access to a library of fused heterocyclic frameworks with significant yields. A systematic investigation of photophysical properties has also been conducted for the discovery of new fluorophores.
A sustainable visible light-mediated synthetic protocol for the construction of color-tunable fluorescent 6-aryl-derived naphthoimidazo[1,2-a]pyridine- and anthraimidazo[1,2-a]pyridine-based molecules has been achieved via ruthenium-catalyzed sequential multiple C-H activation/annulation between heteroarenes and sulfoxonium ylides. This annulation strategy provides easy access to obtain a library of fused heterocyclic frameworks with significant yields and atom economy. In furthering this protocol to discover new small N-fused heterocyclic fluorophores, we also demonstrate a systematic investigation using a practical and computational analysis of photophysical properties. A conceptual trend is deep-rooted across a series of naphthyl and anthracene fused imidazo[1,2-a]pyridines based on the predicted emission wavelengths and theoretical concepts. Towards the end, we demonstrate an effective method to understand and synthesize color-tunable fluorophores under mild reaction conditions with a broad substrate scope.
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