Issue 44, 2009

Synthesis and catalytic application of aluminium anilido-pyrazolate complexes

Abstract

A series of aluminium complexes containing anilido-pyrazolate ligands is described. Reactions of four anilido-pyrazolate ligand precursors, HNPhPz, HNPhTriMePz, HNPhOMePz, or HNPhSMePz [HNPhPz = ortho-C6H4(NH-phenyl)(1-pyrazole); HNPhTriMePz = ortho-C6H4(NH-2,4,6-trimethylphenyl)(1-pyrazole); HNPhOMePz = ortho-C6H4(NH-2-methoxyphenyl)(1-pyrazole); HNPhSMePz = ortho-C6H4(NH-2-methylthiophenyl)(1-pyrazole)], with one molar equivalent of AlMe3 in toluene give the aluminium dimethyl complexes, (NArPz)AlMe2 [Ar = phenyl, (NPhPz)AlMe2 (1); Ar = 2,4,6-trimethylphenyl, (NPhTriMePz)AlMe2 (2); Ar = 2-methoxyphenyl, (NPhOMePz)AlMe2 (3); Ar = 2-methylthiophenyl, (NPhSMePz)AlMe2 (4)], respectively. The molecular structures are reported for compounds 1 and 3. Their catalytic activities toward the ring opening polymerisation reaction of ε-caprolactone in the presence of BnOH are also under investigation.

Graphical abstract: Synthesis and catalytic application of aluminium anilido-pyrazolate complexes

Supplementary files

Article information

Article type
Paper
Submitted
17 Mar 2009
Accepted
19 Sep 2009
First published
15 Oct 2009

Dalton Trans., 2009, 9800-9806

Synthesis and catalytic application of aluminium anilido-pyrazolate complexes

K. Peng and C. Chen, Dalton Trans., 2009, 9800 DOI: 10.1039/B905394H

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