Fibre-reactive dyes, their preparation and their use

A reactive dye of formula (21)

• wherein
• Q2, Q3 and Q4 are each independently of the others hydrogen or unsubstituted or substituted C1–C4alkyl,
• D is the radical of a diazo component, of the benzene or naphthalene series, and
• Y is vinyl or a radical —CH2—CH2—U and U is a group removable under alkaline conditions selected from the group consisting of —Cl, —Br, —F, —OSO3H, —SSO3H, —OCO—CH3, —OPO3H2, —OCO—C6H5, —OSO2—C1–C4alkyl or —OSO2—N(C1–C4alkyl)2.

A reactive dye of formula (23)

• wherein
• Q1, Q2, Q3 and Q4 are each independently of the others hydrogen or unsubstituted or substituted C1–C4alkyl,
• A is the radical of a monoazo, polyazo, metal complex azo, anthraquinone, phthalocyanine, formazan or dioxazine chromophore,
• X is halogen, 3-carboxypyridin-1-yl, 3-carbamoylpyridin-1-yl, hydroxy, C1–C4alkoxy unsubstituted or substituted in the alkyl moiety, phenoxy unsubstituted or substituted in the phenyl moiety,
• C1–C4alkylthio unsubstituted or substituted in the alkyl moiety, unsubstituted or substituted amino, or an N-heterocycle which may or may not contain further hetero atoms, and
• Y is vinyl or a radical —CH2—CH2—U and U is a group removable under alkaline conditions selected from the group consisting of —Cl, —Br, —F, —OSO3H, —SSO3H, —OCO—CH3, —OPO3H2, —OCO—C6H5, —OSO2—C1–C4alkyl or —OSO2—N(C1–C4alkyl)2.