Issue 14, 2013
From the journal:

Dalton Transactions

Cross-coupling of alkyl halides with aryl or alkyl Grignards catalyzed by dinuclear Ni(ii) complexes containing functionalized tripodal amine-pyrazolyl ligands†

Fei Xue,a   Jin Zhao*ab  and  T. S. Andy Hor*ab  

* Corresponding authors

a Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
E-mail: andyhor@nus.edu.sg, chmzhaoj@nus.edu.sg
Fax: +65 6779 1691
Tel: +65 6516 2675

b Institute of Materials Research and Engineering, Agency for Science, Technology and Research, 3 Research Link, Singapore 117602, Singapore

Abstract

Structurally distinctive dinuclear Ni(II) complexes with furan or thiophene tethered amine-pyrazolyl tripodal hybrid ligands have been synthesized and crystallographically characterized. All complexes are catalytically active towards cross-coupling of aryl/alkyl Grignard reagents with β-H containing alkyl halides at room temperature in the presence of N,N,N′,N′-tetramethylethylenediamine (TMEDA). The catalytic efficacy of the complexes is dependent on the tether substituent at the central amine. Two species, Ni(II) TMEDA and Mg(II) TMEDA complexes, have been isolated from the catalytic reaction mixtures under different conditions. Some ligand-stabilized Ni(II) and Mg(II) bimetallic species have also been identified in the ESI-MS spectra.

Graphical abstract: Cross-coupling of alkyl halides with aryl or alkyl Grignards catalyzed by dinuclear Ni(ii) complexes containing functionalized tripodal amine-pyrazolyl ligands

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Article information

DOI
https://doi.org/10.1039/C3DT32111H
Article type
Paper
Submitted
12 Sep 2012
Accepted
08 Jan 2013
First published
10 Jan 2013

Dalton Trans., 2013,42, 5150-5158

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Cross-coupling of alkyl halides with aryl or alkyl Grignards catalyzed by dinuclear Ni(II) complexes containing functionalized tripodal amine-pyrazolyl ligands

F. Xue, J. Zhao and T. S. A. Hor, Dalton Trans., 2013, 42, 5150 DOI: 10.1039/C3DT32111H

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