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Selective Acceptorless Dehydrogenation of Primary Amines to Imines by Core–Shell Cobalt Nanoparticles
Author(s) -
Cui Xinjiang,
Li Wu,
Junge Kathrin,
Fei Zhaofu,
Beller Matthias,
Dyson Paul J.
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201915526
Subject(s) - dehydrogenation , cobalt , cationic polymerization , catalysis , chemistry , nanomaterial based catalyst , nanoparticle , ionic bonding , chloride , primary (astronomy) , selectivity , combinatorial chemistry , organic chemistry , materials science , ion , nanotechnology , physics , astronomy
Core–shell nanocatalysts are attractive due to their versatility and stability. Here, we describe cobalt nanoparticles encapsulated within graphitic shells prepared via the pyrolysis of a cationic poly‐ionic liquid (PIL) with a cobalt(II) chloride anion. The resulting material has a core–shell structure that displays excellent activity and selectivity in the self‐dehydrogenation and hetero‐dehydrogenation of primary amines to their corresponding imines. Furthermore, the catalyst exhibits excellent activity in the synthesis of secondary imines from substrates with various reducible functional groups (C=C, C≡C and C≡N) and amino acid derivatives.