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Issue 38, 2014
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Catalytic bond forming reactions promoted by amidinate, guanidinate and phosphaguanidinate compounds of magnesium

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Abstract

The synthesis and catalytic properties of a series of magnesium compounds consisting of monoanionic, N,N’-chelating ligands (N∩N = amidinates, guanidinates, phosphaguanidinates) is reported. The compounds were synthesized by (i) insertion of a carbodiimide into an existing Mg–C or Mg–N bond, or (ii) protonolysis of an organomagnesium compound by a neutral pre-ligand. Structural analyses of mono- or bis-(chelate) compounds with general formula Mg(N∩N)X(L)n and Mg(N∩N)2(L)n (X = halide, aryloxide, amide; L = Et2O, THF; n = 0, 1 or 2) have been performed and the influence that the ligand substituent patterns have on the solid-state structures has been probed. Selected examples of the compounds were tested as (pre)catalysts for the polymerization of lactide, the dimerization of aldehydes and the hydroacetylenation of carbodiimides.

Graphical abstract: Catalytic bond forming reactions promoted by amidinate, guanidinate and phosphaguanidinate compounds of magnesium

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Publication details

The article was received on 14 Apr 2014, accepted on 07 May 2014 and first published on 08 May 2014


Article type: Paper
DOI: 10.1039/C4DT01097C
Citation: Dalton Trans., 2014,43, 14302-14314
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    Catalytic bond forming reactions promoted by amidinate, guanidinate and phosphaguanidinate compounds of magnesium

    R. J. Schwamm, B. M. Day, N. E. Mansfield, W. Knowelden, P. B. Hitchcock and M. P. Coles, Dalton Trans., 2014, 43, 14302
    DOI: 10.1039/C4DT01097C

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