Use of heterocyclic compounds as bleach activators or optical lighteners in washing and cleaning agents

Abstract From the Canadian patent

Heterocyclic compounds of formula (I) where X stands for O, S or, the N-R3 grouping in which R3 stands for hydrogen, C1-C25 alkyl C1-C25 acyl or an aryl group with up to 12 carbon atoms, Y stands for CH or N, R1 stands for X = S or N-R3 hydrogen, a C1-C25 alkyl or C2-C25 alkenyl group or a phenyl residue which can be additionally substituted by one or two C1-C4 alkyl, C1-C4 alkoxy, hydroxyl, carboxyl sulpho, amino, C1-C4 acylamino, nitro or cyano groups or chlorine or bromine atoms, whereby for two substituents these may be the same or different, R1 stands for X = O, phenyl o-, m- or p-tolyl, p-chlorphenyl, m-nitrophenyl m-methoxyphenyl or, m-methylsulphonylphenyl R2 stands for X = S or …