1-benzopyrane-derivatives and colouring agents containing the salts thereof

Agent for coloring fibers that is obtained by mixing two components—if necessary with addition of an alkalinizing agent or an acid—characterized in that one component (component A2) contains at least one electrophilic compound and the other component (component A1) contains at least one 1-benzopyran of formula (Ia)/(Ib) or a 1-benzopyrylium derivative of formula (I),

• 4
• wherein:
• X denotes an oxygen atom, sulfur atom or selenium atom;
• Rx and Ry independently of each other denote a hydrogen atom, an aryl group, a C1-C8-alkyl group, a C1-C8-monohydroxyalkyl group, a C1-C8-polyhydroxyalkyl group, a C1-C8-alkoxy-(C1-C8)-alkyl group, a halogen atom, an —O—CORa group, an —S—CORa group, an —SRa group, a heteroaryl group, a phenyl group, a benzyl group, an —OCH2-aryl group or a —CH2-Rz group;
• Rx′ and Ry′ independently of each other denote a —CH-Rz group;
• Rz denotes a hydrogen atom, an optionally substituted phenyl group, an optionally substituted naphthyl group, an optionally substituted aromatic carbon ring or heterocyclic ring, a C1-C8-alkyl group, a C1-C8-monohydroxyalkyl group, a C1-C8-polyhydroxyalkyl group, a C1-C8-alkoxy-(C1-C8)-alkyl group, a halogen atom, an —OCORa group, a nitro group, a cyano group, a —CO—Ra group, a —CO—ORa group, a —CO—OCF3 group, a —CONHRa group, a —CO—N(Ra)2 group, an —SO2—NH2 group, an —SO2—NHRa group, an —SO2—N(Ra)2 group or an —SO2—ORa group, wherein Ra stands for a hydrogen atom, an optionally substituted aromatic carbon ring or heterocyclic ring or a (C1-C6)-alkyl group;
• provided that the tautomeric formula (Ia) is valid only when Rx is a —CH2-Rz group, and the tautomeric formula (Ib) is valid only when Ry is a —CH2-Rz group, and Rz in Rx and Rx′ or Ry and Ry′ always has the same meaning;
• R1, R2, R3, R4 and R5 independently of each other denote a hydrogen atom, a straight-chain or branched (C1-C4)-alkyl group, a (C1-C4)-hydroxyalkyl group, a hydroxyl group, a methoxy group, a benzyl group, a halogen atom, a nitro group, a nitroso group, a cyano group, a trifluoromethyl group, a —CHO group, a —CORb group, a —COOH group, a —CO2Rb group, an —OCORb group, an —OCH2-aryl group, an —SO2NH2 group, an —SO2CHF2 group, an —SO2CF3 group, an —SO2NH2 group [sic—Translator], an —SO2NHRb group, an —SO2N(Rb)2 group, an —SO2Rb group, an —NH2 group, an —NH3+ group, an —NHRb group, an —NH2Rb+ group, an —N(Rb)2 group, an —N(Rb)3+ group, an —NHCORb group, an —NHCOORb group, a —CH2NH2 group, a —CH2NHRb group, a —CH2N(Rb)2 group, a —CO2CF3 group or a —PO(ORb)2 group, wherein Rb stands for a hydrogen atom, an optionally substituted aromatic carbon ring or heterocyclic ring or a (C1-C6)-alkyl group);
• and
• A− denotes an anion of an organic or inorganic acid.