- Triple Regioselective Functionalization of Cationic [4]Helicenes via Iridium-Catalyzed Borylation and Suzuki Cross-Coupling Reactivity
Frédéric, L.; Fabri, B.; Guénée, L.; Zinna, F.; di Bari, L.; Lacour, J.
Chem. Eur. J. 2022, 28, e202201853
In essentially one-pot, using Ir- and Pd-catalysis, tris(arene)-functionalized cationic [4]helicenes are synthesized with full regioselectivity and enantiospecificity starting from a trivial precursor (17 examples). This poly-addition of aryl groups improves key optical properties, i.e. fluorescence quantum yields and lifetimes. Electronic circular dichroism and circularly polarized luminescence signatures are observed up to the far-red domain, in particular with additional arenes prone to aggregation.
Highlighted in Swiss Science Concentrates: L. Robustini, C. Klein, L. Pillet, D. Lim, F. Paradisi, Chimia 2023, 77, 66, DOI: 10.2533/chimia.2023.66
DOI : 10.1002/chem.202201853
archive ouverte unige:164195
