Low-Valent Molybdenum PNP Pincer Complexes as Catalysts for the Semihydrogenation of Alkynes

[Image: see text] Low-valent molybdenum PNP pincer complexes were studied as catalysts for the semihydrogenation of alkynes. For that purpose, tBu-substituted PNP complexes PNP(tBu)Mo(CO)(2) (6a) and PNP(tBu)Mo(CO)(3) (6c) and the NNP complex NNP(iPr)Mo(CO)(2)(PPh(3)) ((rac)-7) were synthesized and...

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Autores principales: Both, Niklas F., Spannenberg, Anke, Junge, Kathrin, Beller, Matthias
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9490815/
https://www.ncbi.nlm.nih.gov/pubmed/36156902
http://dx.doi.org/10.1021/acs.organomet.1c00709
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author Both, Niklas F.
Spannenberg, Anke
Junge, Kathrin
Beller, Matthias
author_facet Both, Niklas F.
Spannenberg, Anke
Junge, Kathrin
Beller, Matthias
author_sort Both, Niklas F.
collection PubMed
description [Image: see text] Low-valent molybdenum PNP pincer complexes were studied as catalysts for the semihydrogenation of alkynes. For that purpose, tBu-substituted PNP complexes PNP(tBu)Mo(CO)(2) (6a) and PNP(tBu)Mo(CO)(3) (6c) and the NNP complex NNP(iPr)Mo(CO)(2)(PPh(3)) ((rac)-7) were synthesized and characterized. By utilizing the cyclohexyl-substituted complex PNP(Cy)Mo(CO)(2)(CH(3)CN) (5a), several diphenylacetylene derivatives are transformed to the corresponding (Z)-alkenes with good to very good diastereoselectivities (up to 91:9). Mechanistic experiments indicate an outer-sphere mechanism including metal–ligand cooperativity.
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spelling pubmed-94908152022-09-22 Low-Valent Molybdenum PNP Pincer Complexes as Catalysts for the Semihydrogenation of Alkynes Both, Niklas F. Spannenberg, Anke Junge, Kathrin Beller, Matthias Organometallics [Image: see text] Low-valent molybdenum PNP pincer complexes were studied as catalysts for the semihydrogenation of alkynes. For that purpose, tBu-substituted PNP complexes PNP(tBu)Mo(CO)(2) (6a) and PNP(tBu)Mo(CO)(3) (6c) and the NNP complex NNP(iPr)Mo(CO)(2)(PPh(3)) ((rac)-7) were synthesized and characterized. By utilizing the cyclohexyl-substituted complex PNP(Cy)Mo(CO)(2)(CH(3)CN) (5a), several diphenylacetylene derivatives are transformed to the corresponding (Z)-alkenes with good to very good diastereoselectivities (up to 91:9). Mechanistic experiments indicate an outer-sphere mechanism including metal–ligand cooperativity. American Chemical Society 2022-03-15 2022-07-25 /pmc/articles/PMC9490815/ /pubmed/36156902 http://dx.doi.org/10.1021/acs.organomet.1c00709 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Both, Niklas F.
Spannenberg, Anke
Junge, Kathrin
Beller, Matthias
Low-Valent Molybdenum PNP Pincer Complexes as Catalysts for the Semihydrogenation of Alkynes
title Low-Valent Molybdenum PNP Pincer Complexes as Catalysts for the Semihydrogenation of Alkynes
title_full Low-Valent Molybdenum PNP Pincer Complexes as Catalysts for the Semihydrogenation of Alkynes
title_fullStr Low-Valent Molybdenum PNP Pincer Complexes as Catalysts for the Semihydrogenation of Alkynes
title_full_unstemmed Low-Valent Molybdenum PNP Pincer Complexes as Catalysts for the Semihydrogenation of Alkynes
title_short Low-Valent Molybdenum PNP Pincer Complexes as Catalysts for the Semihydrogenation of Alkynes
title_sort low-valent molybdenum pnp pincer complexes as catalysts for the semihydrogenation of alkynes
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9490815/
https://www.ncbi.nlm.nih.gov/pubmed/36156902
http://dx.doi.org/10.1021/acs.organomet.1c00709
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