Reactive triphendioxazine dyes, methods for the production thereof, and use thereof

A triphendioxazine dye of the formula I

• where
• A1 and A2 are independently hydrogen, phenyl, (C1-C6)-alkyl or substituted (C1-C6)-alkyl;
• B is phenylene, substituted phenylene, naphthylene or substituted naphthylene;
• R1 is hydrogen, (C1-C6)-alkyl or phenyl;
• Y1 is a group of the general formula II or III
• where
• X1 to X3 are independently hydrogen, cyano or halogen with the proviso that at least one of X2 and X3 is halogen;
• X4 is chlorine or fluorine;
• and
• R2 and R3 are independently hydrogen, (C1-C6)-alkyl, (C3-C8)-cycloalkyl, (C1-C6)-alkyl with hydroxyl, —SO3M, —SO2Z, —OSO3M, —COOM, cyano, (C1-C6)-alkoxy, ZSO2-(C1-C6)-alkoxy or phenyl substitution, phenyl, phenyl substituted by one, two or three substituents selected from (C1-C6)-alkyl, (C1-C6)-alkoxy, (C1-C6)-alkoxy-(C1-C6)-alkoxy, hydroxy-(C1-C6)-alkoxy, halogen, —SO3M, —CH2SO3M, —SO2Z, —SO2NR4R5, —CON(R6)—(CH2)2-3—SO2Z or —NHCOX5, or
• R2 and R3 combine with the interadjacent nitrogen atom to form a five- or six-membered saturated ring which contains one or two groups —O— or —NR7—, where R7 is hydrogen or (C1-C6)-alkyl,
• where
• M is hydrogen, ammonium, an alkali metal or the equivalent of an alkaline earth metal;
• R4 and R5 are independently hydrogen, (C1-C6)-alkyl or hydroxy-(C1-C6)-alkyl;
• R6 is hydrogen, (C1-C6)-alkyl or phenyl;
• Z is —CH═CH2 or —CH2CH2Y2, where Y2 is an alkali-eliminable grouping;
• and
• X5 is —CH(Hal)—CH2—Hal or —CH(Hal)═CH2, where Hal is chlorine or bromine.