Issue 30, 2011
From the journal:

Dalton Transactions

Modular ligand variation in calcium bisimidazoline complexes: effects on ligand redistribution and hydroamination catalysis†

James S. Wixeya  and  Benjamin D. Ward*a  

* Corresponding authors

a School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, UK
E-mail: WardBD@Cardiff.ac.uk
Fax: +44 (0)29 208 74030
Tel: +44 (0)29 208 70302

Abstract

A series of calcium complexes supported by chiral bisimidazoline ligands have been studied in the catalytic intramolecular hydroamination/cyclisation of amino-olefins. The complexes [Ca(R-BIM){N(SiMe3)2}(THF)] (R = 4-C6H4Me, 5a, 4-C6H4F, 5b and tBu, 5c) have given competitive enantioselectivities (up to 12%) when compared to current literature studies involving calcium. Bisimidazolines offer a significant advance over similar bisoxazoline ligands, by allowing a greater structural variance through a modular synthetic pathway.

Graphical abstract: Modular ligand variation in calcium bisimidazoline complexes: effects on ligand redistribution and hydroamination catalysis

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Article information

DOI
https://doi.org/10.1039/C1DT10732A
Article type
Communication
Submitted
21 Apr 2011
Accepted
16 May 2011
First published
31 May 2011

Dalton Trans., 2011,40, 7693-7696

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Modular ligand variation in calcium bisimidazoline complexes: effects on ligand redistribution and hydroamination catalysis

J. S. Wixey and B. D. Ward, Dalton Trans., 2011, 40, 7693 DOI: 10.1039/C1DT10732A

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