Catalytic Deoxygenation of Amine and Pyridine N‑Oxides Using Rhodium PCcarbeneP Pincer Complexes

Rhodium PCcarbeneP pincer complexes 1-L (L = PPh3, PPh2(C6F5), PCy3) readily facilitate deoxygenation of amine and pyridine N-oxides. The resulting complexes exhibit η2-CO coordination of the resulting keto POP pincer ligand. These η2-CO linkages in the metalloepoxide complexes are readily reduced...

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Bibliographic Details
Published in:Organometallics 2020-03, Vol.39 (6), p.797-803
Main Authors: Tinnermann, Hendrik, Sung, Simon, Cala, Ben A., Gill, Hashir J., Young, Rowan D.
Format: Article
Language:English
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Summary:Rhodium PCcarbeneP pincer complexes 1-L (L = PPh3, PPh2(C6F5), PCy3) readily facilitate deoxygenation of amine and pyridine N-oxides. The resulting complexes exhibit η2-CO coordination of the resulting keto POP pincer ligand. These η2-CO linkages in the metalloepoxide complexes are readily reduced by isopropyl alcohol and various benzylic alcohols. Thus, efficient catalytic deoxygenation of amine and pyridine N-oxides is possible using complexes 1-L and isopropyl alcohol. This represents a pioneering example of PCcarbeneP pincer complexes being used as catalysts for catalytic deoxygenation.
ISSN:0276-7333
1520-6041
DOI:10.1021/acs.organomet.9b00778