Publikation: Amide versus amine ligand paradigm in the direct amination of alcohols with Ru-PNP complexes
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Datum
2018
Autor:innen
Choi, Jong-Hoo
Allen, Henry
Murray, George
Ganji, Prasad
van Leeuwen, Piet W. N. M.
Prechtl, Martin H. G.
Vogt, Dieter
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Catalysis Science & Technology. 2018, 8(15), pp. 3969-3976. ISSN 2044-4753. eISSN 2044-4761. Available under: doi: 10.1039/c8cy00869h
Zusammenfassung
The catalytic activity of a series of Ru-PNP pincer ligand complexes was studied in the direct amination of alcohols with ammonia. It turned out that all complexes of PNP ligands bearing a secondary amine showed no activity in this hydrogen-shuttling reaction sequence, while all complexes of homologous ligands bearing a tertiary amine gave active catalysts. Further comparative studies on catalysts bearing an acridine-based PNP pincer ligand and a PNP ligand of the Xantphos family provided valuable mechanistic insight that led to the design of a highly active catalyst. It appears that in the group of ligands studied here only ligands that do not form stable Ru-amido complexes are active alcohol amination catalysts.
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PINGEN, Dennis, Jong-Hoo CHOI, Henry ALLEN, George MURRAY, Prasad GANJI, Piet W. N. M. VAN LEEUWEN, Martin H. G. PRECHTL, Dieter VOGT, 2018. Amide versus amine ligand paradigm in the direct amination of alcohols with Ru-PNP complexes. In: Catalysis Science & Technology. 2018, 8(15), pp. 3969-3976. ISSN 2044-4753. eISSN 2044-4761. Available under: doi: 10.1039/c8cy00869hBibTex
@article{Pingen2018Amide-43580,
year={2018},
doi={10.1039/c8cy00869h},
title={Amide versus amine ligand paradigm in the direct amination of alcohols with Ru-PNP complexes},
number={15},
volume={8},
issn={2044-4753},
journal={Catalysis Science & Technology},
pages={3969--3976},
author={Pingen, Dennis and Choi, Jong-Hoo and Allen, Henry and Murray, George and Ganji, Prasad and van Leeuwen, Piet W. N. M. and Prechtl, Martin H. G. and Vogt, Dieter}
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<dcterms:abstract xml:lang="eng">The catalytic activity of a series of Ru-PNP pincer ligand complexes was studied in the direct amination of alcohols with ammonia. It turned out that all complexes of PNP ligands bearing a secondary amine showed no activity in this hydrogen-shuttling reaction sequence, while all complexes of homologous ligands bearing a tertiary amine gave active catalysts. Further comparative studies on catalysts bearing an acridine-based PNP pincer ligand and a PNP ligand of the Xantphos family provided valuable mechanistic insight that led to the design of a highly active catalyst. It appears that in the group of ligands studied here only ligands that do not form stable Ru-amido complexes are active alcohol amination catalysts.</dcterms:abstract>
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