Chiral Near-Infrared Fluorophores by Self-Promoted Oxidative Coupling of Cationic Helicenes with Amines/Enamines.
Angew Chem Int Ed Engl
; 60(16): 8733-8738, 2021 04 12.
Article
em En
| MEDLINE
| ID: mdl-33481294
ABSTRACT
In one pot, tertiary alkyl amines are oxidized to enamines by cationic dioxa[6]helicene, which further reacts as electrophile and oxidant to form mono or bis donor-π-acceptor coupling products. This original and convergent synthetic approach provides a strong extension of conjugation yielding chromophores that absorb intensively in far-red or NIR domains (λmax up to 791â
nm) and fluoresce in the NIR as well (λmax up to 887â
nm). Intense ECD properties around 790â
nm with a |Δϵ| value up to 60â
M-1 cm-1 are observed.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Ano de publicação:
2021
Tipo de documento:
Article
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