2026-04-17T04:47:18Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/74072026-02-06T12:52:47Zcom_10259_3592com_10259_3591com_10259.4_106com_10259_2604com_10259_4363com_10259_5086com_10259_6185com_10259_3924col_10259_3930col_10259_4364col_10259_6186col_10259_3925
Repositorio Institucional de la Universidad de Burgos
author
Echevarría Poza, Igor
author
Vaquero Gutiérrez, Mónica
author
Manzano, Blanca R.
author
Jalón Sotés, Félix Ángel
author
Quesada Pato, Roberto
author
Espino Ordóñez, Gustavo
2023-02-07T09:18:18Z
2023-02-07T09:18:18Z
2022-04
0020-1669
http://hdl.handle.net/10259/7407
10.1021/acs.inorgchem.2c00358
1520-510X
Photoredox catalysis constitutes a very powerful tool in
organic synthesis, due to its versatility, efficiency, and the mild conditions
required by photoinduced transformations. In this paper, we present an
efficient and selective photocatalytic procedure for the aerobic oxidative
dehydrogenation of partially saturated N-heterocycles to afford the respective
N-heteroarenes (indoles, quinolines, acridines, and quinoxalines). The
protocol involves the use of new Ir(III) biscyclometalated photocatalysts
of the general formula [Ir(C^N)2(N^N′)]Cl, where the C^N ligand is 2-
(2,4-difluorophenyl)pyridinate, and N^N′ are different ligands based on the
2-(2′-pyridyl)benzimidazole scaffold. In-depth electrochemical and photophysical studies as well as DFT calculations have allowed us to establish
structure−activity relationships, which provide insights for the rational design
of efficient metal-based dyes in photocatalytic oxidation reactions. In
addition, we have formulated a dual mechanism, mediated by the radical
anion superoxide, for the above-mentioned transformations.
eng
Atribución 4.0 Internacional
Excited states
Ligands
Redox reactions
Solvents
Transition metals
Photocatalytic Aerobic Dehydrogenation of N-Heterocycles with Ir(III) Photosensitizers Bearing the 2(2′-Pyridyl)benzimidazole Scaffold
info:eu-repo/semantics/article
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