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

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.

SUBMITTER: Senthamarai T

PROVIDER: S-EPMC8157512 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature

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

Senthamarai Thirusangumurugan T Chandrashekhar Vishwas G VG Gawande Manoj B MB Kalevaru Narayana V NV Zbořil Radek R Kamer Paul C J PCJ Jagadeesh Rajenahally V RV Beller Matthias M

Chemical science 20200221 11

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 ...[more]

PMID: 34122798

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