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Controllable Isomerization of Alkenes by Dual Visible‐Light‐Cobalt Catalysis

We report herein that thermodynamic and kinetic isomerization of alkenes can be accomplished by the combination of visible light with Co catalysis. Utilizing Xantphos as the ligand, the most stable isomers are obtained, while isomerizing terminal alkenes over one position can be selectively controll...

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Autores principales: Meng, Qing‐Yuan, Schirmer, Tobias E., Katou, Kousuke, König, Burkhard
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6519376/
https://www.ncbi.nlm.nih.gov/pubmed/30835931
http://dx.doi.org/10.1002/anie.201900849
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author Meng, Qing‐Yuan
Schirmer, Tobias E.
Katou, Kousuke
König, Burkhard
author_facet Meng, Qing‐Yuan
Schirmer, Tobias E.
Katou, Kousuke
König, Burkhard
author_sort Meng, Qing‐Yuan
collection PubMed
description We report herein that thermodynamic and kinetic isomerization of alkenes can be accomplished by the combination of visible light with Co catalysis. Utilizing Xantphos as the ligand, the most stable isomers are obtained, while isomerizing terminal alkenes over one position can be selectively controlled by using DPEphos as the ligand. The presence of the donor–acceptor dye 4CzIPN accelerates the reaction further. Transformation of exocyclic alkenes into the corresponding endocyclic products could be efficiently realized by using 4CzIPN and Co(acac)(2) in the absence of any additional ligands. Spectroscopic and spectroelectrochemical investigations indicate Co(I) being involved in the generation of a Co hydride, which subsequently adds to alkenes initiating the isomerization.
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spelling pubmed-65193762019-05-23 Controllable Isomerization of Alkenes by Dual Visible‐Light‐Cobalt Catalysis Meng, Qing‐Yuan Schirmer, Tobias E. Katou, Kousuke König, Burkhard Angew Chem Int Ed Engl Communications We report herein that thermodynamic and kinetic isomerization of alkenes can be accomplished by the combination of visible light with Co catalysis. Utilizing Xantphos as the ligand, the most stable isomers are obtained, while isomerizing terminal alkenes over one position can be selectively controlled by using DPEphos as the ligand. The presence of the donor–acceptor dye 4CzIPN accelerates the reaction further. Transformation of exocyclic alkenes into the corresponding endocyclic products could be efficiently realized by using 4CzIPN and Co(acac)(2) in the absence of any additional ligands. Spectroscopic and spectroelectrochemical investigations indicate Co(I) being involved in the generation of a Co hydride, which subsequently adds to alkenes initiating the isomerization. John Wiley and Sons Inc. 2019-03-26 2019-04-16 /pmc/articles/PMC6519376/ /pubmed/30835931 http://dx.doi.org/10.1002/anie.201900849 Text en © 2019 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Communications
Meng, Qing‐Yuan
Schirmer, Tobias E.
Katou, Kousuke
König, Burkhard
Controllable Isomerization of Alkenes by Dual Visible‐Light‐Cobalt Catalysis
title Controllable Isomerization of Alkenes by Dual Visible‐Light‐Cobalt Catalysis
title_full Controllable Isomerization of Alkenes by Dual Visible‐Light‐Cobalt Catalysis
title_fullStr Controllable Isomerization of Alkenes by Dual Visible‐Light‐Cobalt Catalysis
title_full_unstemmed Controllable Isomerization of Alkenes by Dual Visible‐Light‐Cobalt Catalysis
title_short Controllable Isomerization of Alkenes by Dual Visible‐Light‐Cobalt Catalysis
title_sort controllable isomerization of alkenes by dual visible‐light‐cobalt catalysis
topic Communications
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6519376/
https://www.ncbi.nlm.nih.gov/pubmed/30835931
http://dx.doi.org/10.1002/anie.201900849
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