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Issue 11, 2020
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Ultra-small cobalt nanoparticles from molecularly-defined Co–salen complexes for catalytic synthesis of amines

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Abstract

We report the synthesis of in situ generated cobalt nanoparticles from molecularly defined complexes as efficient and selective catalysts for reductive amination reactions. In the presence of ammonia and hydrogen, cobalt–salen complexes such as cobalt(II)–N,N′-bis(salicylidene)-1,2-phenylenediamine produce ultra-small (2–4 nm) cobalt-nanoparticles embedded in a carbon–nitrogen framework. The resulting materials constitute stable, reusable and magnetically separable catalysts, which enable the synthesis of linear and branched benzylic, heterocyclic and aliphatic primary amines from carbonyl compounds and ammonia. The isolated nanoparticles also represent excellent catalysts for the synthesis of primary, secondary as well as tertiary amines including biologically relevant N-methyl amines.

Graphical abstract: Ultra-small cobalt nanoparticles from molecularly-defined Co–salen complexes for catalytic synthesis of amines

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Supplementary files

Article information


Submitted
02 Oct 2019
Accepted
03 Feb 2020
First published
21 Feb 2020

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2020,11, 2973-2981
Article type
Edge Article

Ultra-small cobalt nanoparticles from molecularly-defined Co–salen complexes for catalytic synthesis of amines

T. Senthamarai, V. G. Chandrashekhar, M. B. Gawande, N. V. Kalevaru, R. Zbořil, P. C. J. Kamer, R. V. Jagadeesh and M. Beller, Chem. Sci., 2020, 11, 2973
DOI: 10.1039/C9SC04963K

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