Journal
CHEMICAL SCIENCE
Volume 11, Issue 11, Pages 2973-2981Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9sc04963k
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Funding
- European Research Council (EU) [670986-NoNaCat]
- State of Mecklenburg-Vorpommern
- Operational Programme Research, Development and Education - European Regional Development Fund of the Ministry of Education, Youth and Sports of the Czech Republic [CZ.02.1.01/0.0/0.0/16_019/0000754, CZ.02.1.01/0.0/0.0/15_003/0000416]
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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.
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