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Synthesis of new tripodal ligand: N,N-bis[(1,5-dimethylpyrazol-3-yl)methyl]benzylamine.: Catecholase activity of two series of tripodal ligands with some copper (II) salts

Paper ID Volume ID Publish Year Pages File Format Full-Text
52715 46882 2007 6 PDF Available
Title
Synthesis of new tripodal ligand: N,N-bis[(1,5-dimethylpyrazol-3-yl)methyl]benzylamine.: Catecholase activity of two series of tripodal ligands with some copper (II) salts
Abstract

A synthesis of new tripodal ligand: N,N-bis[(1,5-dimethylpyrazol-3-yl)methyl]benzylamine is reported. Copper (II) complexes of compounds: N,N-bis(3,5-dimethylpyrazol-1-ylmethyl)-amines (L1–L5) and N,N-bis[(1,5-dimethylpyrazol-3-yl)methyl]-amines (L6–L9) were examined for their catalytic activities. The dioxygen complexes of copper (II) were generated in situ by stirring copper salts and the tridentate pyrazole ligands. It has been found that the oxidation of 3,5-di-tert-butylcatechol is very efficient to give 3,5-di-tert-butylquinone. Ligand structure has proven critical in controlling not only the formation of complexes but also their subsequent reactivity. The nature of junction between the pyrazolic rings and the benzene have a large effect on the oxidation reaction rate.

Keywords
Tripod; Oxidation; 3, 5-Di-tert-butylcatechol; Junction; Copper (II); Pyrazole
First Page Preview
Synthesis of new tripodal ligand: N,N-bis[(1,5-dimethylpyrazol-3-yl)methyl]benzylamine.: Catecholase activity of two series of tripodal ligands with some copper (II) salts
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 8, Issue 4, April 2007, Pages 707–712
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis