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Issue 21, 2019
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Facile synthesis of Pd(ii) and Ni(ii) pincer carbene complexes by the double C–H bond activation of a new hexahydropyrimidine-based bis(phosphine): catalysis of C–N couplings

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Abstract

Hexahydropyrimidine-based bis(phosphine), a pro-NHC ligand, was synthesized in one step and excellent yield. It underwent spontaneous double C–H bond activation to give cationic pincer NHC complexes of the type [(PCP)MCl]X (M = Pd, Ni and X = Cl, BF4) in the absence of any external reagents. Their structures were determined by X-ray diffraction methods and the mechanism of formation of palladium carbene complexes as analyzed by DFT calculations showed two transition states. The Pd(II) carbene complex effectively catalyzes a few C–N cross coupling reactions.

Graphical abstract: Facile synthesis of Pd(ii) and Ni(ii) pincer carbene complexes by the double C–H bond activation of a new hexahydropyrimidine-based bis(phosphine): catalysis of C–N couplings

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Supplementary files

Article information


Submitted
21 Aug 2018
Accepted
09 Jan 2019
First published
09 Jan 2019

Dalton Trans., 2019,48, 7203-7210
Article type
Paper

Facile synthesis of Pd(II) and Ni(II) pincer carbene complexes by the double C–H bond activation of a new hexahydropyrimidine-based bis(phosphine): catalysis of C–N couplings

V. Subramaniyan, B. Dutta, A. Govindaraj and G. Mani, Dalton Trans., 2019, 48, 7203
DOI: 10.1039/C8DT03413C

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