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Pyridinylidenaminophosphines: Facile Access to Highly Electron‐Rich Phosphines

Electron‐rich tertiary phosphines are valuable species in chemical synthesis. However, their broad application as ligands in catalysis and reagents in stoichiometric reactions is often limited by their costly synthesis. Herein, we report the synthesis and properties of a series of phosphines with 1‐...

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Autores principales: Rotering, Philipp, Wilm, Lukas F. B., Werra, Janina A., Dielmann, Fabian
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/PMC6972615/
https://www.ncbi.nlm.nih.gov/pubmed/31688978
http://dx.doi.org/10.1002/chem.201904621
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author Rotering, Philipp
Wilm, Lukas F. B.
Werra, Janina A.
Dielmann, Fabian
author_facet Rotering, Philipp
Wilm, Lukas F. B.
Werra, Janina A.
Dielmann, Fabian
author_sort Rotering, Philipp
collection PubMed
description Electron‐rich tertiary phosphines are valuable species in chemical synthesis. However, their broad application as ligands in catalysis and reagents in stoichiometric reactions is often limited by their costly synthesis. Herein, we report the synthesis and properties of a series of phosphines with 1‐alkylpyridin‐4‐ylidenamino and 1‐alkylpyridin‐2‐ylidenamino substituents that are accessible in a very short and scalable route starting from commercially available aminopyridines and chlorophosphines. The determination of the Tolman electronic parameter (TEP) value reveals that the electron donor ability can be tuned by the substituent pattern at the aminopyridine backbone and it can exceed that of common alkylphosphines and N‐heterocyclic carbenes. The potential of the new phosphines as strong nucleophiles in phosphine‐mediated transformations is demonstrated by the formation of Lewis base adducts with CO(2) and CS(2). In addition, the coordination chemistry of the new phosphines towards Cu(I), Au(I), and Pd(II) metal centers has been explored, and a convenient procedure to introduce the most basic phosphine into metal complexes starting from air‐stable phosphonium salt is described.
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spelling pubmed-69726152020-01-27 Pyridinylidenaminophosphines: Facile Access to Highly Electron‐Rich Phosphines Rotering, Philipp Wilm, Lukas F. B. Werra, Janina A. Dielmann, Fabian Chemistry Communications Electron‐rich tertiary phosphines are valuable species in chemical synthesis. However, their broad application as ligands in catalysis and reagents in stoichiometric reactions is often limited by their costly synthesis. Herein, we report the synthesis and properties of a series of phosphines with 1‐alkylpyridin‐4‐ylidenamino and 1‐alkylpyridin‐2‐ylidenamino substituents that are accessible in a very short and scalable route starting from commercially available aminopyridines and chlorophosphines. The determination of the Tolman electronic parameter (TEP) value reveals that the electron donor ability can be tuned by the substituent pattern at the aminopyridine backbone and it can exceed that of common alkylphosphines and N‐heterocyclic carbenes. The potential of the new phosphines as strong nucleophiles in phosphine‐mediated transformations is demonstrated by the formation of Lewis base adducts with CO(2) and CS(2). In addition, the coordination chemistry of the new phosphines towards Cu(I), Au(I), and Pd(II) metal centers has been explored, and a convenient procedure to introduce the most basic phosphine into metal complexes starting from air‐stable phosphonium salt is described. John Wiley and Sons Inc. 2019-12-10 2020-01-07 /pmc/articles/PMC6972615/ /pubmed/31688978 http://dx.doi.org/10.1002/chem.201904621 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/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Communications
Rotering, Philipp
Wilm, Lukas F. B.
Werra, Janina A.
Dielmann, Fabian
Pyridinylidenaminophosphines: Facile Access to Highly Electron‐Rich Phosphines
title Pyridinylidenaminophosphines: Facile Access to Highly Electron‐Rich Phosphines
title_full Pyridinylidenaminophosphines: Facile Access to Highly Electron‐Rich Phosphines
title_fullStr Pyridinylidenaminophosphines: Facile Access to Highly Electron‐Rich Phosphines
title_full_unstemmed Pyridinylidenaminophosphines: Facile Access to Highly Electron‐Rich Phosphines
title_short Pyridinylidenaminophosphines: Facile Access to Highly Electron‐Rich Phosphines
title_sort pyridinylidenaminophosphines: facile access to highly electron‐rich phosphines
topic Communications
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6972615/
https://www.ncbi.nlm.nih.gov/pubmed/31688978
http://dx.doi.org/10.1002/chem.201904621
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