Diazacycloalkane derivatives as bleach catalyst and composition and method for bleaching a substrate

Abstract From the Canadian patent

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 using the compounds. The compounds are of the general formula: wherein Z represents a group selected from -NH-2 -NHR4, -, N(R4)2, -N(R4)3+, -NO2, -NHC(O)R4 -N(R4)C(O)R4 (wherein R4 represents alkyl cycloalkyl, aryl, arylalkyl or heteroarylalkyl each optionally substituted by , -F, -Cl -Br, -I, -NH3+, -SO3H, -SO3-(Na+, K+), -COOH -COO-(Na+, K+), -, P(O)(OH)2, or -P(O)(O-(Na+ K+))2 ), an optionally substituted heterocyclic ring or an optionally substituted heteroaromatic ring selected from pyridine pyrimidine, …