Unilever Home and Personal Care Usa, Division of Conopco, Inc.

Catexel Limited

Unilever Plc

Stephen William Russell

Ronald Hage

Jean Hypolites Koek

Bernard Lucas Feringa

Roelant Mathijs Hermant

Michel Gilbert Delroisse

Jane Whittaker

Robertus Everardus Kalmeijer

Christiaan Lamers

Minze Theunis Rispens

Ronaldus Theodorus Vliet

Wei Zhao

David Tetard

Jianrong Zhang

Xiaohong Wang

Adrianus Cornelis Appel

Lodewijk Van Der Wolf

Minze Rispens

Ronaldus Theodorus Van Vliet

The present invention provides improved processes for the synthesis of 1,4-ditosyl-1,4,7-triazacyclonone, comprising deprotecting a compound of formula (C): wherein P is tosylate or arylsulfonate, with an acidic medium to form 1,2-bis(1,4,7-triazacyclonon-1-yl)-ethane; and subsequently adding formaldehyde and formic acid to the acidic medium to form 1,2-bis-(4,7-dimethyl-1,4,7-triazacyclonon-1-yl)-ethane (Me-DTNE). The syntheses of intermediates are also disclosed.

1,2-bis-(4,7-dimethyl-1,4,7-triazacyclonon-1-yl)-ethane and intermediate for the synthesis of same

Compounds are provided that may be used as ligands in transition metal complexes, in turn useful as bleach catalysts. Also provided are complexes, bleaching compositions and methods of using the compounds.

Bleach catalyst and composition and method for bleaching a substrate

A detergent bleaching composition is provided comprising a compound inclug a specified pentadentate nitrogen-containing ligand. The compound can activate hydrogen peroxide or peroxyacids and provides favourable stain removal properties, particularly in the presence or iron, manganese or copper ions. In addition, an improved stability in alkaline aqueous environment has been obtained, in particular at the peroxy compound concentrations generally present in the fabric washing liquor.

Detergent bleaching composition comprising pentadentate ligand

A bleach and oxidation catalyst is provided comprising a catalytically ace iron, manganese or copper complex including a specified pentadentate nitrogen-containing ligand. The metal complex can activate hydrogen peroxide or peroxyacids and provides favourable stain removal properties. In addition, a considerably improved stability of these metal complex compounds in alkaline aqueous environment has been obtained, in particular at the peroxy compound concentrations generally present in the fabric washing liquor.

Bleach and oxidation catalyst

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Rhoon, Netherlands

Stephen William Russell