Sustainable photocatalytic C-H annulation of heteroarenes with sulfoxonium ylides: synthesis and photophysical properties of fused imidazo[1,2-a]pyridine-based molecules

Autor
Sana, Sravani
Reddy Dannarm, Srinivas
Tokala, Ramya
Dastari, Sowmya
Sathish, Manda
Kumar, Rahul
Sonti, Rajesh
Shankaraiah, Nagula
Fecha
2023Resumen
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.
Fuente
Mayo Clinic Proceedings, 99(4), 564-577Link de Acceso
Click aquí para ver el documentoIdentificador DOI
doi.org/10.1039/D3QO00923HColecciones
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