Synthesis and catalytic activity of palladium complexes bearing N-heterocyclic carbenes (NHCs) and 1,4,7-triaza-9-phosphatricyclo[5.3.2.1]tridecane (CAP) ligands†
Vladislav A.
Voloshkin, 
a
Ekaterina
Martynova,
a
Sofie M. P.
Vanden Broeck,
a
Marek
Beliš,
a
Catherine S. J.
Cazin
a
and
Steven P.
Nolan
*a
a
Ekaterina
Martynova,
a
Sofie M. P.
Vanden Broeck,
a
Marek
Beliš,
a
Catherine S. J.
Cazin
a
and
Steven P.
Nolan
*a
Abstract
The synthesis and characterization of novel palladium complexes bearing N-heterocyclic carbenes (NHCs) and 1,4,7-triaza-9-phosphatricyclo[5.3.2.1]tridecane (CAP) are reported. These organometallic complexes can be easily obtained using two different synthetic strategies that involve either the substitution of the pyridine ligand from trans-[Pd(NHC)(Py)Cl2] or by simple addition of the CAP ligand to dimeric species [Pd(NHC)Cl2]2. The mixed NHC/CAP complexes were tested as pre-catalysts in the Buchwald–Hartwig aryl amination coupling, showing good catalytic activity, especially in the case of cis-[Pd(IPr)(CAP)Cl2].
![Graphical abstract: Synthesis and catalytic activity of palladium complexes bearing N-heterocyclic carbenes (NHCs) and 1,4,7-triaza-9-phosphatricyclo[5.3.2.1]tridecane (CAP) ligands](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=D1DT01716K&imageInfo.ImageIdentifier.Year=2021)
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