Titel
Photoredox Annulation of Polycyclic Aromatic Hydrocarbons
Autor*in
Oliwia Matuszewska
School of Chemistry, Cardiff University
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Abstract
The rise of interest in using polycyclic aromatic hydrocarbons (PAHs) and molecular graphenoids in optoelectronics has recently stimulated the growth of modern synthetic methodologies giving access to intramolecular aryl–aryl couplings. Here, we show that a radical-based annulation protocol allows expansion of the planarization approaches to prepare functionalized molecular graphenoids. The enabler of this reaction is peri-xanthenoxanthene, the photocatalyst which undergoes photoinduced single electron transfer with an ortho-oligoarylenyl precursor bearing electron-withdrawing and nucleofuge groups. Dissociative electron transfer enables the formation of persistent aryl radical intermediates, the latter undergoing intramolecular C–C bond formation, allowing the planarization reaction to occur. The reaction conditions are mild and compatible with various electron-withdrawing and -donating substituents on the aryl rings as well as heterocycles and PAHs. The method could be applied to induce double annulation reactions, allowing the synthesis of π-extended scaffolds with different edge peripheries.
Stichwort
radicalaryl−aryl couplingpolycyclic aromatic hydrocarbonsnanographenesphotoredoxPXX
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
phaidra.univie.ac.at/o:2043901
Erschienen in
Titel
JACS Au
Band
3
Ausgabe
11
ISSN
2691-3704
Erscheinungsdatum
2023
Seitenanfang
3045
Seitenende
3054
Publication
American Chemical Society (ACS)
Fördergeber
Europäische Union (alle Programme) — 722591
Europäische Union (alle Programme) — 734834
Erscheinungsdatum
2023
Zugänglichkeit
Rechte
Rechteangabe
© 2023 The Authors
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