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Cobalt‐Catalyzed Dehydrogenative Coupling of Amines into Imines
Author(s) -
Bottaro Fabrizio,
Takallou Ahmad,
Chehaiber Ahmad,
Madsen Robert
Publication year - 2019
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.201901462
Subject(s) - cobalt , chemistry , catalysis , nanoparticle , yield (engineering) , transmission electron microscopy , cobalt oxide , trioctylphosphine oxide , photochemistry , polymer chemistry , inorganic chemistry , organic chemistry , nanotechnology , materials science , metallurgy , extraction (chemistry)
Primary amines have been subjected to an acceptorless dehydrogenative homo‐ and heterocoupling into imines with a cobalt catalyst. The catalytically active species are composed of cobalt nanoparticles, which are generated in situ by heating Co 2 (CO) 8 in the presence of trioctylphosphine oxide as a surfactant. The nanoparticles have been characterized by transmission electron microscopy where the image showed spherical and small particles with a narrow size distribution. The catalyst can be recovered and used again with essentially no effect on the yield. The catalyst can also be used for the dehydrogenative coupling of alcohols and amines into imines.