Yellow anionic disazo dyes

Abstract
The present invention relates to novel yellow anionic dyes, a process for their preparation, certain novel intermediates necessary for their preparation and the use of these dyes for dyeing natural or synthetic materials, in particular, paper.
Description

The present invention relates to novel yellow anionic dyes, a process for their preparation, certain novel intermediates necessary for their preparation and the use of these dyes for dyeing natural or synthetic materials, in particular, paper.


The use of diaminobenzanilides as building blocks for the synthesis of bisazo dyes and the advantages thereof has been described in Dyes and Pigments, 17, 297-302 (1991). On this basis, a number of bisazo orange and yellow dyes containing pyrazolones and phenolic derivatives as coupling components have been described, for example, in DE 2,362,995 and in JP 51-11817, whilst further symmetrical bisazo dyes containing 1-phenyl-5-amino pyrazoles have also been reported in U.S. Pat. No. 5,545,725.


However, a requirement exists to provide further anionic dyes especially of neutral or greenish yellow shades, which dyes exhibit excellent degrees of exhaustion with high colour strength, whilst being sufficiently water-soluble to provide stable aqueous formulations without the need for large quantities of solubilizers. Furthermore, dyings obtained should exhibit high degrees of bleed- and light-fastness, be even- or top-sided and be readily bleachable.


Surprisingly, it has now been found that certain bisazo dyes based on diaminobenzanilides exhibit excellent effects with respect to the desired properties.


Accordingly, the invention relates to compounds of the formula




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in which

  • R1 represents hydrogen, substituted or unsubstituted C1-C8alkyl, substituted or unsubstituted C1-C8alkoxy or SO3H,
  • R2 represents SO3H or CO2H,
  • R3 and R3, each, independently of the other, represent hydrogen, a C1-C4alkyl group, which may be substituted or unsubstituted, halogen, hydroxy, substituted or unsubstituted C1-C4alkoxy, carboxy, NH2 or NHC1-C4alkyl and each of the residues
  • A1 and A2, independently of the other, is derived from a coupling component selected from the group consisting of
    • an acetoacetylated amine of the formula




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in which

  • X1 represents C1-C4alkyl, or phenyl which is unsubstituted or monosubstituted by C1-C4alkyl, C1-C4alkoxy or halogen and
  • X2 represents phenyl which is unsubstituted, mono-, di- or trisubstituted by one or two SO3H, SO2NHC1-C4 alkyl groups which alkyl groups may be substituted, SO2C1-C4alkyl, C1-C4substituted or unsubstituted alkyl, hydroxy, C1-C4alkoxy, halogen, CF3, NH2, NHCOC1-C4alkyl, NHCOOC1-C4alkyl, NHCONHC1-C4alkyl, CO2H, CONHC1-C4alkyl or NO2; a 1- or 2-naphthyl residue which is unsubstituted or substituted by one or two SO3H, SO2NHC1-C4alkyl, carboxy, CONHC1-C4alkyl, carboxyC1-C4alkyl or carboxyaryl groups or a 5- or 6-membered heterocyclic ring containing 1-3 heteroatoms and which may be benzannelated and be further substituted by C1-C4alkyl, C1-C4alkoxy or halogen and which may be attached to the NH-atom in formula (2) either via the hetero- or benzo-nucleus, in the case of benzannelated heterocycles;
  • a derivative of barbituric acid of the formula




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in which

  • Y represents O, NCN or NCONH2;
  • a 2,4,6-triaminopyrimidine;
  • a pyridone derivative of the formula




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in which

  • Q1 represents hydrogen, hydroxy, C1-C2alkyl, hydroxyethyl, 2-(C1-C2alkoxy)alkyl, C1-C2alkoxy, COOH, CONH2 or COO C1-C2alkyl,
  • Q2 represents hydrogen, CN, halogen, SO3H or C1-C2alkyl which is unsubstituted or substituted by hydroxy, phenyl or SO3H,
  • Q3 represents hydrogen, phenyl, C1-C2alkylphenyl, cyclohexyl or C1-C4alkyl which is unsubstituted or substituted by hydroxy, CN, C1-C2alkoxy or SO3H and
  • Q4 represents hydrogen or hydroxy;
  • an aminopyrazole or a pyrazolone derivative of formula




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in which

  • R4 represents hydrogen, substituted or unsubstituted C1-C4alkyl, C2-C4alkenyl, NHCO C1-C4alkyl or CO2H, each
  • R5 and R6, independently of the other, represent hydrogen, halogen, C1-C4alkyl, SO3H or CO2H and
  • R7 represents hydrogen or C1-C4alkyl;
  • a benzoic acid derivative of formula




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in which

  • R7 represents hydrogen or C1-C4alkyl and
  • R8 represents hydrogen or hydroxy or
  • A1 and A2, each one independently of the other, represent a phenol residue of the formula




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in which

  • R9 and R10, each one independently of the other, represent hydrogen, C1-C4alkyl, C1-C4alkoxy, hydroxy, halogen, NH2, NHCO C1-C4alkyl, NO2, SO3H, CO2C1-C4alkyl or CONHC1-C4alkyl groups,
  • with the proviso that in compounds of formula




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if

  • R1, R2, R3 and R3, each, independently of the others, are hydrogen or SO3H, then
  • A1 and A2 are not both a 1-phenyl or 1-sulphophenyl-3-methyl-5-aminopyrazole residue, or, if
  • R1, R2, R3 and R3, represent hydrogen and
  • A1 is a residue of formula (9) in which
  • R7 represents hydrogen or methyl, then
  • A2 does not represent a 1-phenyl or 1-sulphophenyl-3-methyl- or 3-carboxy pyrazol-5-one residue


    or, if
  • R1, R3 and R3, are hydrogen and R2 is SO3H and one of
  • A1 and A2 represents a 1-sulphophenyl-3-methylpyrazol-5-one residue, then the other is not a residue of formula (11) in which both
  • R9 and R10 are hydrogen.


In one preferred aspect of the invention, the compounds of formula (1), contain a total number of two, three or four SO3H and/or CO2H groups. These sulphonic and/or carboxylic acid groups may be represented either, as written, in the form of the free acid or in the salt form, SO3M and/or CO2M. M is preferably one equivalent of a colourless cation, typically lithium, sodium, potassium, ammonium or the protonated form of a C4-C12trialkylamine, C4-C12diamine, C2-C12alkanolamine or of a polyglycol amine, conveniently, triethanolamine trisglycol ether, or mixtures of such cationic species.


M as a protonated C4-C12trialkylamine may, for example, be a protonated N-ethyl-dimethylamine, N,N-diethylmethylamine, tri-n-propylamine, tri-n-butylamine, tri-isobutylamine, and, preferably, triethylamine or triisopropylamine.


M as a protonated C4-C12diamine may, for example, be ethylenediamine, or 1,3-diaminopropane, in which one or both nitrogen atoms are additionally substituted by one or two C1-C4alkyl radicals, preferably methyl or ethyl radicals. M is preferably an N,N-dialkylethylenediamine or N,N-dialkyl-1,3-diaminopropane. Illustrative examples are: N-ethylethylenediamine, N,N-dimethylethylenediamine, N,N′-dimethylethylenediamine, N,N-diethylethylenediamine, 3-dimethylamino-1-propylamine or 3-diethylamino-1-propylamine. M as a protonated C2-C12alkanolamine may be the protonated form of a monoalkanolamine, dialkanolamine, monoalkanolmonoalkylamine, monoalkanoldialkylamine, dialkanolalkylamine or trialkanolamine or a mixture of different protonated alkanolamines. Illustrative examples are: protonated 2-aminoethanol, bis(2-hydroxyethyl)amine, N-(2-hydroxyethyl)dimethylamine, N-(2-hydroxyethyl)diethylamine, N,N-bis(2-hydroxyethyl)ethylamine or tris(2-hydroxyethyl)-amine.


One further preferred class of compounds of formula (1) is that of the formula




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in which

  • R1 represents hydrogen, C1-C4alkyl, C1-C4alkoxy or SO3H,
  • R2 represents SO3H or CO2H,
  • R3 represents hydrogen, a C1-C4alkyl group, halogen, hydroxy, C1-C4alkoxy, carboxy, NH2 or NHC1-C4alkyl,
  • R3a represents hydrogen or NH2 and
  • A1 and A2 are as defined above.


More preferably, however, in the above compounds of formula (13),

  • R3 and R3a both represent hydrogen and
  • A1 and A2, each one independently of the other, is derived from a coupling component selected from the group consisting of
  • an acetoacetylated amine of the formula




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in which

  • X1 represents C1-C4alkyl, and
  • X2 represents phenyl, which is unsubstituted, mono-, di- or trisubstituted by SO3H, C1-C4alkyl, hydroxy, C1-C4alkoxy, halogen or CO2H;
  • barbituric acid or cyanoiminobarbituric acid;
  • 2,4,6-triaminopyrimidine;
  • citrazinic acid;
  • an aminopyrazole or a pyrazolone derivative of formula




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in which

  • R4 represents C1-C4alkyl or CO2H,
  • R5 represents hydrogen, halogen, C1-C4alkyl, SO3H or CO2H and
  • R6 represents hydrogen;
  • a benzoic acid derivative of formula




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in which

  • R7 represents hydrogen or C1-C4alkyl and
  • R8 represents hydrogen or hydroxy or
  • A1 and A2, each one independently of the other, represent a phenol residue of the formula




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in which

  • R9 represents hydrogen, C1-C4alkyl, C1-C4alkoxy, hydroxy, halogen or SO3H and
  • R10 represents hydrogen.


Most preferred compounds of formula (13) are those in which

  • R1 represents hydrogen, C1-C4alkoxy, especially methoxy, or SO3H,
  • R2 represents SO3H or CO2H,
  • R3 and R3, both represent hydrogen and the coupling component A1 is derived from an acetoacetylated amine of formula (2), barbituric acid, a compound of formula (5) or (7) in which R4 represents C1-C4alkyl, especially methyl, R5 represents hydrogen or SO3H and R6 represents hydrogen or from salicyclic acid and the coupling component A2 is derived from an acetoacetylated amine of formula (2), whereby, in formula (2), X1 preferably represents methyl and X2 preferably represents phenyl, which is monosubstituted by SO3H or trisubstituted by SO3H, methyl and methoxy or A2 is derived from an aminpyrazole of formula (5) in which R4 represents C1-C4alkyl, especially methyl, R5 represents hydrogen or SO3H and R6 represents hydrogen.


A second preferred class of compounds of formula (1) is that of the formula




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in which

  • R1 represents hydrogen, C1-C4alkyl, C1-C4alkoxy or SO3H,
  • R2 represents SO3H or CO2H,
  • R3 represents hydrogen, a C1-C4alkyl group, halogen, hydroxy, C1-C4alkoxy, carboxy, NH2 or NHC1-C4alkyl,
  • R3a represents hydrogen or NH2 and
  • A1 and A2 are as defined for formula (1) above.


More preferably, however, in the above compounds of formula (14)

  • R3 and R3a both represent hydrogen and
  • A1 and A2, each one independently of the other, is derived from a coupling component selected from the group consisting of
  • an acetoacetylated amine of the formula




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in which

  • X1 represents C1-C4alkyl, and
  • X2 represents phenyl, which is unsubstituted, mono-, di- or trisubstituted by SO3H, C1-C4alkyl, hydroxy, C1-C4alkoxy, halogen or CO2H;
  • barbituric acid or cyanoiminobarbituric acid;
  • 2,4,6-triaminopyrimidine;
  • citrazinic acid;
  • an aminopyrazole or a pyrazolone derivative of formula




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in which

  • R4 represents C1-C4alkyl or CO2H,
  • R5 represents hydrogen, halogen, C1-C4alkyl, SO3H or CO2H and
  • R6 represents hydrogen;
  • a benzoic acid derivative of formula




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in which

  • R7 represents hydrogen or C1-C4alkyl and
  • R8 represents hydrogen or hydroxy or
  • A1 and A2, each one independently of the other, represent a phenol residue of the formula




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in which

  • R9 represents hydrogen, C1-C4alkyl, C1-C4alkoxy, hydroxy, halogen or SO3H and
  • R10 represents hydrogen.


Most preferred compounds of formula (14) are those in which

  • R1 represents hydrogen, C1-C4alkoxy, especially methoxy, or SO3H,
  • R2 represents SO3H or CO2H,
  • R3 and R3a both represent hydrogen and the coupling component A1 is derived from an acetoacetylated amine of formula (2), barbituric acid, cyanoiminobarbituric acid, 2,4,6-triaminopyrimidine, citrazinic acid, a compound of formula (5) or (7) in which R4 represents C1-C4alkyl, especially methyl, R5 represents hydrogen or SO3H and
  • R6 represents hydrogen or from salicyclic acid, methyl salicyclic acid, phenol or methyl phenol and the coupling component A2 is derived from an acetoacetylated amine of formula (2), whereby, in formula (2), X1 preferably represents methyl and X2 preferably represents phenyl, which is monosubstituted by SO3H or, especially, trisubstituted by SO3H, methyl and methoxy or A2 is derived from an aminpyrazole of formula (5) in which R4 represents C1-C4alkyl, especially methyl, R5 represents hydrogen or SO3H and R6 represents hydrogen.


A third preferred class of compounds of formula (1) is that of formula




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in which

  • R1 represents hydrogen, C1-C4alkyl, C1-C4alkoxy or SO3H,
  • R2 represents SO3H or CO2H,
  • R3 represents hydrogen, a C1-C4alkyl group, halogen, hydroxy, C1-C4alkoxy, carboxy, NH2 or NHC1-C4alkyl,
  • R3a represents hydrogen or NH2 and
  • A1 and A2 are as defined for formula (1) above.


More preferably, however, in the above compounds of formula (15)

  • R3 and R3a both represent hydrogen and
  • A1 and A2, each one independently of the other, is derived from a coupling component selected from the group consisting of
  • an acetoacetylated amine of the formula




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in which

  • X1 represents C1-C4alkyl, and
  • X2 represents phenyl, which is unsubstituted, mono-, di- or trisubstituted by SO3H, C1-C4alkyl, hydroxy, C1-C4alkoxy, halogen or CO2H;
  • barbituric acid or cyanoiminobarbituric acid;
  • 2,4,6-triaminopyrimidine;
  • citrazinic acid;
  • an aminopyrazole or a pyrazolone derivative of formula




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in which

  • R4 represents C1-C4alkyl or CO2H,
  • R5 represents hydrogen, halogen, C1-C4alkyl, SO3H or CO2H and
  • R6 represents hydrogen;
  • a benzoic acid derivative of formula




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in which

  • R7 represents hydrogen or C1-C4alkyl and
  • R8 represents hydrogen or hydroxy or
  • A1 and A2, each one independently of the other, represent a phenol residue of the formula




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in which

  • R9 represents hydrogen, C1-C4alkyl, C1-C4alkoxy, hydroxy, halogen or SO3H and
  • R10 represents hydrogen.


Most preferred compounds of formula (15) are those in which

  • R1 represents hydrogen or C1-C4alkoxy, especially hydrogen,
  • R2 represents SO3H or CO2H, especially SO3H,
  • R3 and R3a both represent hydrogen and the coupling component A1 is derived from an acetoacetylated amine of formula (2), barbituric acid, cyanoiminobarbituric acid, triaminopyrimidine, citrazinic acid, a compound of formula (5) or (7) in which R4 represents C1-C4alkyl, especially methyl, R5 represents hydrogen or SO3H and
  • R6 represents hydrogen or from salicyclic acid, methyl salicyclic acid, phenol or methyl phenol and the coupling component A2 is derived from an acetoacetylated amine of formula (2), whereby, in formula (2), X1 preferably represents methyl and X2 preferably represents phenyl, which is monosubstituted by SO3H or, especially, trisubstituted by SO3H, methyl and methoxy or A2 is derived from an aminpyrazole of formula (5) in which R4 represents C1-C4alkyl, especially methyl, R5 represents hydrogen or SO3H and R6 represents hydrogen.


A fourth preferred class of compounds of formula (1) is that of formula




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in which

  • R1 represents hydrogen, C1-C4alkyl, C1-C4alkoxy or SO3H,
  • R2 represents SO3H or CO2H,
  • R3 represents hydrogen, a C1-C4alkyl group, halogen, hydroxy, C1-C4alkoxy, carboxy, NH2 or NHC1-C4alkyl,
  • R3a represents hydrogen or NH2 and
  • A1 and A2 are as defined for formula (1) above.


More preferably, however, in the above compounds of formula (16),

  • R3 and R3a both represent hydrogen and
  • A1 and A2, each one independently of the other, is derived from a coupling component selected from the group consisting of
  • an acetoacetylated amine of the formula




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in which

  • X1 represents C1-C4alkyl, and
  • X2 represents phenyl, which is unsubstituted, mono-, di- or trisubstituted by SO3H, C1-C4alkyl, hydroxy, C1-C4alkoxy, halogen or CO2H;
  • barbituric acid or cyanoiminobarbituric acid;
  • 2,4,6-triaminopyrimidine;
  • citrazinic acid;
  • an aminopyrazole or a pyrazolone derivative of formula




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in which

  • R4 represents C1-C4alkyl or CO2H,
  • R5 represents hydrogen, halogen, C1-C4alkyl, SO3H or CO2H and
  • R6 represents hydrogen;
  • a benzoic acid derivative of formula




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in which

  • R7 represents hydrogen or C1-C4alkyl and
  • R8 represents hydrogen or hydroxy or
  • A1 and A2, each one independently of the other, represent a phenol residue of the formula




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in which

  • R9 represents hydrogen, C1-C4alkyl, C1-C4alkoxy, hydroxy, halogen or SO3H and
  • R10 represents hydrogen.


Most preferred compounds of formula (16) are those in which

  • R1 represents hydrogen or C1-C4alkoxy, especially hydrogen,
  • R2 represents SO3H or CO2H, especially SO3H,
  • R3 and R3a both represent hydrogen and the coupling component A1 is derived from an acetoacetylated amine of formula (2), barbituric acid, cyanoiminobarbituric acid, 2,4,6-triaminopyrimidine, citrazinic acid, a compound of formula (5) or (7) in which R4 represents C1-C4alkyl, especially methyl, R5 represents hydrogen or SO3H and
  • R6 represents hydrogen or from salicyclic acid, methyl salicyclic acid, phenol or methyl phenol and the coupling component A2 is derived from an acetoacetylated amine of formula (2), whereby, in formula (2), X1 preferably represents methyl and X2 preferably represents phenyl, which is monosubstituted by SO3H or, especially, trisubstituted by SO3H, methyl and methoxy or A2 is derived form an aminpyrazole of formula (5) in which R4 represents C1-C4alkyl, especially methyl, R5 represents hydrogen or SO3H and R6 represents hydrogen.


Within the scope of the definitions of the above formulae and radicals (1) to (16), a C1-C8alkyl radical may be branched or unbranched, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, t-butyl, 2-ethylbutyl, n-pentyl, isopentyl, 1-methylpentyl, 1,3-dimethylbutyl, n-hexyl, 1-methylhexyl, n-heptyl, isoheptyl, 1,1,3,3-tetramethylbutyl, 1-methylheptyl, 3-methylheptyl, n-octyl or 2-ethylhexyl.


Similarly, C1-C8alkoxy may be, for example, methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, sec-butoxy, isobutoxy, t-butoxy, 2-ethylbutoxy, n-pentoxy, isopentoxy, 1-methylpentoxy, 1,3-dimethylbutoxy, n-hexyloxy, 1-methylhexyloxy, n-heptyloxy, isoheptyloxy, 1,1,3,3-tetramethylbutoxy. 1-methylheptyloxy, 3-methylheptyloxy, n-octyloxy or 2-ethylhexyloxy


When such alkyl or alkoxy radicals are substituted, appropriate substituents may typically include one or two hydroxy, SO3H, carboxy, C1-C4alkoxy, hydroxy-substituted C1-C4alkoxy, phenyl or phenoxy groups. Suitable radicals of this type may include hydroxyethyl, 1-hydroxyisopropyl, ethoxymethyl, 2-hydroxyethoxypentyl, benzyl, 1-phenylethyl, 2-phenylethyl, 1-methyl-2-phenylethyl, 1-isobutyl-3-phenylpropyl or 1-methyl-2-phenoxyethyl.


Halogen in the above formulae and radicals is iodine, bromine, fluorine or, especially, chlorine.


Where, in the derivatives of formulae (4) and (5), R4 represents C2-C4alkenyl, this may, for example, be ethenyl, n-propenyl, isopropenyl, n-butenyl or isobutenyl.


Where, in the acetoacetylated amines of formula (2), X2 represents a 5- or 6-membered heterocyclic ring containing 1-3 heteroatoms and which may be benzannelated, these may be, for example, oxazol-2-yl, thiazol-2-yl, benzoxazol-2-, 5-, or 6-yl, benzothiazol-2-, 5- or 6-yl, benzimidazolone-5-yl, pyrid-2,3- or 4-yl, quinolin-2-, 4-, 5- or 6-yl or 1,3,5-triazin-2-yl radicals.


The dyes of formula (1) of the invention may be prepared by known methods, for example by tetrazotisation of a diaminobenzanilide derivative of the formula




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in which R1, R2, R3 and R3a are as defined for formula (1), and sequential coupling with a coupling component of the formula A1H or A2H, followed by coupling with a coupling component of the formula A2H or A1H, A2 and A1 being as defined for formula (1).


Such sequential coupling reactions have been described previously (see, for example, U.S. Pat. No. 5,545,725). However, it is advantageous to perform the initial coupling reaction at a pH value of between 2 and 5, especially between 2.5 and 4, whilst the subsequent coupling reaction is performed at a pH value of between 5 and 9, preferably between 6 and 8.


The coupling components A1H and A2H are known compounds or may be prepared by known methods, whilst some of the diaminobenzanilides of formula (14) are novel. Consequently, a further aspect of the invention is a compound of the formula




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preferably 4,4′diamino-2′-methoxybenzanilide 5′-sulphonic acid or 3,4′diamino-2′-methoxy-benzanilide 5′-sulphonic acid, a process for the preparation thereof, by reaction of 2-methoxy-4-nitroaniline-5-sulphonic acid with the appropriate nitrobenzoyl halide, preferably m- or p-nitrobenzoyl chloride, followed by reduction of the resulting dinitrobenzanilide by known methods and also the use of the compound (18) for the preparation of the appropriate compound of formula (1).


The dyes of the invention may be used to dye natural or synthetic materials, for example, cellulosic materials, carbonamide group containing materials such as polyamides, leather or glass fibres, but are particularly useful for dyeing paper. They are preferably used as a solid or liquid commercial form.


The pulverulent or granular form of the dye is used particularly in batchwise pulp dyeing where the dye mixture, customarily in the form of a stock solution, is added in the pulper, in the beater or in the mixing chest. Preference is here given to using dye preparations which as well as the dye, may further include extenders, for example urea as solubilizer, dextrin, Glauber salt, sodium chloride and also dispersants, dustproofing agents and sequestrants, such as tetrasodium phosphate.


The present invention accordingly further provides solid dye preparations for dyeing paper comprising a compound of the formula (1) and, optionally, further auxiliaries.


In recent years, the use of concentrated aqueous solutions of dyes has gained importance because of the advantages possessed by such solutions when compared with dyes in powder form. The use of solutions avoids the difficulties associated with dust formation and releases the user from the time-consuming and frequently difficult dissolving of the dye powder in water. The use of concentrated solutions was also prompted by the development of continuous dyeing processes for paper, since it is convenient in these processes to meter the solution directly into the pulp stream or to add it at some other suitable point of the paper-making process.


The present invention accordingly further provides aqueous solutions, preferably concentrated solutions, for dyeing paper, comprising a compound of the formula (1), preferably in a concentration of from 5 to 30% by weight. Due to their excellent solubility in water, the dyes of formula (1) are particularly suitable for the preparation of such solutions.


The concentrated solutions preferably contain a low level of inorganic salts, which may be achieved, if necessary, by known methods, for example reverse osmosis.


The solutions may include further auxiliaries, for example solubilizers such as ε-caprolactam or urea, organic solvents, for example glycols, polyethylene glycols, dimethyl sulphoxide, N-methylpyrrolidone, acetamide, alkanolamines or polyglycolamines, which is a still further aspect of the invention.


In addition, the aqueous dye solutions of the present invention may be applied to paper by use of the so-called spraying technique.


The novel dyes of the invention dye paper in predominantly yellow shades with excellent degrees of exhaustion with high colour strength, whilst being sufficiently water-soluble to provide stable aqueous formulations without the need for large quantities of solubilizers. Furthermore, dyings obtained exhibit high degrees of bleed- and light-fastness, are even- or top-sided and readily bleachable.


Furthermore, as a result of their high colour strength and water solubility, the novel dyes of the invention are suitable for use in the ink-jet printing method.


Consequently, one further aspect of the invention is paper which is dyed with a compound of the formula (1), either in the form of a solid dye preparation, or an aqueous solution, as described above.


The following Examples serve to illustrate the invention without intending to be restrictive in nature. Parts and percentages are by weight unless otherwise stated.


Synthesis of Intermediate Diaminobenzanilides







EXAMPLE 1



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73.5 g of p-penylenediamine 2-sulphonic acid are added to 300 g of water and, after addition of approximately 40 g of sodium carbonate, the violet suspension is stirred until solution results. The pH is adjusted to 7.5 by addition of concentrated hydrochloric acid and a solution of 78 g of p-nitrobenzoyl chloride in 100 ml of acetone then added slowly at 25-32° C., the pH being maintained at 6.7-7.0 by addition of 2N aqueous sodium hydroxide. After stirring for a further 1.5 hours, 210 ml of water are added and the pH adjusted to 4.0 by addition of 22 ml of concentrated hydrochloric acid. The readily stirrable suspension is filtered at room temperature and washed with 200 ml of water. The filter cake is then stirred in water at 50° C., filtered hot and dried to yield 75 g of 4′amino-4-nitrobenzanilide 3-sulphonic acid.


A mixture of 1300 g of water, 46.2 g of iron filings and 5.8 g of ammonium chloride is heated to boiling with vigorous stirring and then treated with 55 g of 4′amino-4-nitrobenzanilide 3-sulphonic acid, obtained as described above. The resulting suspension is stirred for a further 1 hour at 95-100° C. and, subsequently, cooled to room temperature. The suspension is filtered hot and the filtrate stirred with 5 g of Hyflo Carcel™ for 30 minutes at room temperature. After filtering, the pH of the hot filtrate is adjusted to 2.0 by addition of 18 g of concentrated hydrochloric acid and the white precipitate filtered and dried. There are obtained 39 g of 4,4′diaminobenzanilide 5′-sulphonic acid of formula (100a).


EXAMPLE 2



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74.5 g of 2-methoxy-4-nitroaniline 5-sulphonic acid are added to 300 g of water and, after addition of approximately 30 g of sodium carbonate, the yellowish orange suspension is stirred until solution results. The pH is adjusted to 7.0 by addition of concentrated hydrochloric acid and a solution of 60 g of p-nitrobenzoyl chloride in 75 ml of acetone then added slowly below 28° C., the pH being maintained at 6.7-7.0 by addition of 2N aqueous sodium hydroxide. After stirring for a further 2 hours, 650 g of water are added and the pH adjusted to 4.0 by addition of 2N aqueous hydrochloric acid. The readily stirrable suspension is filtered, the filter cake washed with 200 g of water and sucked dry. There are obtained 391 g of damp filter cake, which is used directly for the next step.


A mixture of 1000 g of water, 60 g of iron filings and 7.6 g of ammonium chloride is heated to boiling with vigorous stirring and then treated with 145 g of the damp filter cake, obtained as described above. The resulting suspension is stirred for a further 2 hours at 90-95° C. and, subsequently, 700 g of water are added. The suspension is filtered hot and the filtrate stirred with 10 g of Hyflo Supercel™ for 30 minutes at 85° C. After filtering, the pH of the hot filtrate is adjusted to 3.8 by addition of 24 g of concentrated hydrochloric acid and the white precipitate filtered and dried. There are obtained 34.3 g of 4,4′diamino-2′-methoxybenzanilide 5′-sulphonic acid of formula (100b).


EXAMPLES 3-10

By following the procedure described in Examples 1 or 2, employing appropriate starting materials, the following benzanilides may be obtained, as summarized in Table 1 below.











TABLE 1





Example Nr.
Compound Nr
Formula

















3
(100c)


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4
(100d)


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5
(100e)


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6
(100f)


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7
(100g)


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8
(100h)


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9
(100i)


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10
(100j)


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Synthesis of Dyes


EXAMPLE 11



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3.1 g of the compound of formula (100a) are suspended in 50 g of water and 5.7 g of concentrated hydrochloric acid and subsequently treated with 4.75 ml of a 4N aqueous sodium nitrite solution at 0-5° C. over a period of 1 hour. The mixture is stirred for a further 1 hour and excess nitrite then destroyed by addition of 0.3 ml of 2N sulphamic acid. The resultant beige suspension is diluted with 60 g of water and then treated with a total of 2.4 g of 5-amino-3-methyl-1-(3-sulphophenyl)pyrazole, in portions, at 5° C., the pH being maintained at 3.6-4.0 by addition of a total of 13.7 ml of 2N aqueous sodium hydroxide solution. The resulting monoazo suspension is then added slowly, during 70 minutes, to a solution of 1.7 g of 5-amino-3-methyl-1-phenyl pyrazole dissolved in 50 g of water and 50 g of dimethyl formamide, the pH being maintained at 6.5 by addition of a total of 11.9 ml of 2N aqueous sodium hydroxide solution. After stirring for a further 1.5 hours at room temperature, 50 ml of isopropanol and 30 g of sodium chloride are added, the mixture stirred for 1 hour and the resulting yellowish brown suspension filtered. After drying, there are obtained 6.7 g of the compound of formula (101).


EXAMPLE 12



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3.1 g of the compound of formula (100a) are suspended in 50 g of water and 5.7 g of concentrated hydrochloric acid and subsequently treated with 4.75 ml of a 4N aqueous sodium nitrite solution at 0-5° C. over a period of 1 hour. The mixture is stirred for a further 1 hour and excess nitrite then destroyed by addition of 0.3 ml of 2N sulphamic acid. The resultant beige suspension is diluted with 60 g of water and then treated with 1.75 g of 5-amino-3-methyl-1-phenyl pyrazole and reaction continued for 2.5 hours at 5° C., the pH being maintained at 3.8-4.0 by addition of a total of 15.9 ml of 2N aqueous sodium hydroxide solution. The resulting monoazo suspension is then added slowly, during 2.5 hours, to a solution of 3.0 g of 3-acetoacetylamino-4-methoxy toluene 6-sulphonic acid dissolved in 50 g of water and 50 g of dimethyl formamide, the pH being maintained at 6.8 by addition of a total of 7 ml of 2N aqueous sodium hydroxide solution. After stirring for a further 1.5 hours at 30-35° C., 75 ml of isopropanol and 45 g of sodium chloride are added and the resulting yellow suspension filtered. After drying, there are obtained 6.8 g of the compound of formula (102).


EXAMPLE 13



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3.1 g of the compound of formula (100a) are suspended in 50 g of water and 5.7 g of concentrated hydrochloric acid and subsequently treated with 4.75 ml of a 4N aqueous sodium nitrite solution at 0-5° C. over a period of 1 hour. The mixture is stirred for a further 1 hour and excess nitrite then destroyed by addition of 0.3 ml of 2N sulphamic acid. The resultant beige suspension is diluted with 60 g of water and then treated with 1.2 g of barbituric acid. The pH is raised to 2.5 and then maintained at 2.3-2.5 over a period of 3 hours by addition of a total of 5.1 ml of 4N aqueous sodium hydroxide solution. The resulting monoazo suspension is then added slowly, during 1.5 hours, to a solution of 3.5 g of 3-acetoacetylamino-4-methoxy toluene 6-sulphonic acid dissolved in 100 g of water, the pH being maintained at 6.5 by addition of a total of 5.4 ml of 4N aqueous sodium hydroxide solution. After stirring for a further 2.5 hours at room temperature, 75 ml of isopropanol and 15 g of sodium chloride are added and, after stirring briefly at room temperature, the resulting yellowish red suspension is filtered. After drying, there are obtained 7.1 g of the compound of formula (103).


EXAMPLE 14



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3.1 g of the compound of formula (100a) are suspended in 50 g of water and 5.7 g of concentrated hydrochloric acid and subsequently treated with 4.75 ml of a 4N aqueous sodium nitrite solution at 0-5° C. over a period of 1 hour. The mixture is stirred for a further 1 hour and excess nitrite then destroyed by addition of 0.3 ml of 2N sulphamic acid. The resultant beige suspension is filtered and the moist presscake suspended in 110 ml of water. 1.75 g of 3-methyl-1-phenyl pyrazo-2-one are added and the pH raised to 3.7. By the addition of a total of 2.5 ml of 4N aqueous sodium hydroxide solution, the pH is maintained at 3.5-4.0, whilst the temperature is raised stepwise from 10° C. to 30° C. After stirring for a total of 3.5 hours the coupling reaction is complete. To the resulting monoazo suspension are then added 50 g of dimethyl formamide followed by 3.5 g of 3-acetoacetylamino-4-methoxy toluene 6-sulphonic acid. The pH is adjusted to 7.0-7.5 and maintained at this value by addition of a further 2.7 ml of 4N aqueous sodium hydroxide solution. After stirring for a further 2 hours at room temperature, 20 g of sodium chloride are added, the mixture stirred for 1 hour at room temperature and the resulting yellow suspension filtered. After drying, there are obtained 5.5 g of the compound of formula (104).


EXAMPLE 15



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3.1 g of the compound of formula (100a) are suspended in 50 g of water and 5.7 g of concentrated hydrochloric acid and subsequently treated with 4.75 ml of a 4N aqueous sodium nitrite solution at 0-5° C. over a period of 1 hour. The mixture is stirred for a further 1 hour and excess nitrite then destroyed by addition of 0.3 ml of 2N sulphamic acid. The resultant beige suspension is filtered and the moist presscake suspended in 110 ml of water. 1.4 g of salicylic acid are added and the pH raised to 3.0-3.3. By the addition of a total of 4.9 ml of 2N aqueous sodium hydroxide solution, the pH is maintained at 3.0-3.5. After stirring for a total of 2.5 hours at room temperature the coupling reaction is complete. To the resulting monoazo suspension are then added 3.5 g of 3-acetoacetylamino-4-methoxy toluene 6-sulphonic acid. The pH is adjusted to 6.5 and maintained at this value by addition of a further 4.9 ml of 2N aqueous sodium hydroxide solution. After stirring for a total of 3.5 hours at room temperature, 10 g of sodium chloride and 15 ml of isopropanol are added, the pH increased to 8.5 and the resulting yellowish brown suspension filtered. After drying, there are obtained 5.2 g of the compound of formula (105).


EXAMPLES 16-116

By proceeding in an analogous manner to that described in Examples 11-15, but utilizing the appropriate coupling components, compounds of formula (19) are obtained, as summarized in the following Table 2.










TABLE 2








(19)




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Example Nr.
Compound Nr.
A′1
A′2













16
(106)


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17
(107)


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18
(108)


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19
(109)


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20
(110)


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21
(111)


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22
(112)


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23
(113)


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24
(114)


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25
(115)


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26
(116)


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27
(117)


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28
(118)


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29
(119)


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30
(120)


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31
(121)


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32
(122)


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embedded image







33
(123)


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embedded image







34
(124)


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embedded image







35
(125)


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embedded image







36
(126)


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embedded image







37
(127)


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embedded image







38
(128)


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embedded image







39
(129)


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embedded image







40
(130)


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embedded image







41
(131)


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embedded image







42
(132)


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embedded image







43
(133)


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embedded image







44
(134)


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embedded image







45
(135)


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embedded image







46
(136)


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embedded image







47
(137)


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embedded image







48
(138)


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embedded image







49
(139)


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50
(140)


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embedded image







51
(141)


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embedded image







52
(142)


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embedded image







53
(143)


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54
(144)


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55
(145)


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embedded image







56
(146)


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embedded image







57
(147)


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embedded image







58
(148)


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embedded image







59
(149)


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60
(150)


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embedded image







61
(151)


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embedded image







62
(152)


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embedded image







63
(153)


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embedded image







64
(154)


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embedded image







65
(155)


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66
(156)


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67
(157)


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68
(158)


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embedded image







69
(159)


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70
(160)


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embedded image







71
(161)


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embedded image







72
(162)


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embedded image







73
(163)


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embedded image







74
(164)


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embedded image







75
(165)


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embedded image







76
(166)


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embedded image







77
(167)


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embedded image







78
(168)


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embedded image







79
(169)


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embedded image







80
(170)


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embedded image







81
(171)


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embedded image







82
(172)


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embedded image







83
(173)


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embedded image







84
(174)


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embedded image







85
(175)


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embedded image







86
(176)


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embedded image







87
(177)


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embedded image







88
(178)


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embedded image







89
(179)


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embedded image







90
(180)


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embedded image







91
(181)


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embedded image







92
(182)


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embedded image







93
(183)


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embedded image







94
(184)


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embedded image







95
(185)


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embedded image







96
(186)


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embedded image







97
(187)


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embedded image







98
(188)


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embedded image







99
(189)


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100
(190)


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embedded image







101
(191)


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embedded image







102
(192)


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103
(193)


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embedded image







104
(194)


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embedded image







105
(195)


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embedded image







106
(196)


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embedded image







107
(197)


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embedded image







108
(198)


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embedded image







109
(199)


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embedded image







110
(200)


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embedded image







111
(201)


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embedded image







112
(202)


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embedded image







113
(203)


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embedded image







114
(204)


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embedded image







115
(205)


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embedded image







116
(206)


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EXAMPLE 117



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4.5 g of 4,4′diamino-2′-methoxybenzanilide 5′-sulphonic acid of formula (100b), prepared as described in Example 2, are suspended in 50 g of water and 7.6 g of concentrated hydrochloric acid and subsequently treated with 5.7 ml of 4N aqueous sodium nitrite solution over 1 hour at 0-5° C. The mixture is stirred for a further 1 hour and excess nitrite destroyed by addition of 0.8 ml of 2N aqueous sulphamic acid solution. The resulting yellow suspension is diluted with 60 g of water and treated with 2.9 g of 5-amino-3-methyl-1-(3-sulphophenyl)pyrazole at 5° C., the pH being initially raised to 3.5 and maintained at 3.0-3-5 by the addition of a total of 27.4 ml of 2N aqueous sodium hydroxide solution. After stirring for 2.5 hours the initial coupling reaction is completed. The resulting monoazo suspension is slowly added to a solution of 4.0 g of 3-acetacetylamino-4-methoxytoluene 6-sulphonic acid in 50 g of dimethylformamide over 2.5 hours at 30° C., the pH being maintained at 6.8-7.0 by addition of a total of 7.3 ml of 4N aqueous sodium hydroxide solution. After stirring for 1.5 hours at 30° C., 35 g of sodium chloride and 50 g of isopropanol are added, the mixture stirred over night and the precipitated solids filtered. After drying, there are obtained 10.2 g of the compound of formula (207).


EXAMPLE 118



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4.5 g of 4,4′diamino-2′-methoxybenzanilide 5′-sulphonic acid of formula (100b), prepared as described in Example 2, are suspended in 50 g of water and 7.6 g of concentrated hydrochloric acid and subsequently treated with 5.7 ml of 4N aqueous sodium nitrite solution over 1 hour at 0-5° C. The mixture is stirred for a further 1 hour and excess nitrite destroyed by addition of 0.8 ml of 2N aqueous sulphamic acid solution. The resulting yellow suspension is added to a solution of 7.7 g of 3-acetacetylamino-4-methoxytoluene 6-sulphonic acid in 100 g of water over 30 minutes at 5° C., the pH being of which is initially adjusted to 3.8 and is maintained at 3.8-4.0 by the addition of a total of 22.6 ml of 2N aqueous sodium hydroxide solution. Subsequently, the pH is raised to 6.8-7.4 by addition of a further 10.1 ml of 2N aqueous sodium hydroxide solution and the temperature increased to 25-40° C. After stirring for a total of 3 hours, 45 g of potassium chloride and 50 g of isopropanol are added and the precipitated solids filtered. After drying, there are obtained 12.9 g of the compound of formula (208).


EXAMPLE 119



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2.1 g of 4,4′diamino-2′-methoxybenzanilide 5′-sulphonic acid of formula (100b), prepared as described in Example 2, are suspended in 50 g of water and 7.6 g of concentrated hydrochloric acid and subsequently treated with 5.7 ml of 4N aqueous sodium nitrite solution over 1 hour at 0-5° C. The mixture is stirred for a further 1 hour and excess nitrite destroyed by addition of 2N aqueous sulphamic acid solution. The resulting yellow solution is treated with 0.9 g of 5-amino-3-methyl-1-phenyl pyrazole at 5° C., the pH being initially raised to 3.0 and maintained at 2.5-3.0 by the addition of a total of 3.1 ml of 4N aqueous sodium hydroxide solution. After stirring for 2.5 hours and slowly warming to 20° C., the initial coupling reaction is completed. To the resulting monoazo suspension are added 1.7 g of 3-acetacetylamino-4-methoxytoluene 6-sulphonic acid, the pH raised to 6.5 and maintained at 6.0-7.5 by addition of a total of 2.2 ml of 4N aqueous sodium hydroxide solution. After stirring for 3 hours at 20-40° C. reaction is complete and the precipitated solids are filtered. After drying, there are obtained 5.4 g of the compound of formula (209).


EXAMPLES 120-191

By proceeding in an analogous manner to that described in Examples 117-119, but utilizing the appropriate coupling components, compounds of formula (20) are obtained, as summarized in the following Table 3.










TABLE 3








(20)




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Example Nr.
Compound Nr.
A′1
A′2





120
(210)


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121
(211)


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122
(212)


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123
(213)


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embedded image







124
(214)


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embedded image







125
(215)


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embedded image







126
(216)


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embedded image







127
(217)


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embedded image







128
(218)


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embedded image







129
(219)


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embedded image







130
(220)


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embedded image







131
(221)


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embedded image







132
(222)


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embedded image







133
(223)


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embedded image







134
(224)


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embedded image







135
(225)


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embedded image







136
(226)


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embedded image







137
(227)


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embedded image







138
(228)


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embedded image







139
(229)


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embedded image







140
(230)


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embedded image







141
(231)


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embedded image







142
(232)


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embedded image







143
(233)


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embedded image







144
(234)


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embedded image







145
(235)


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embedded image







146
(236)


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embedded image







147
(237)


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embedded image







148
(238)


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embedded image







149
(239)


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embedded image







150
(240)


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embedded image







151
(241)


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embedded image







152
(242)


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embedded image







153
(243)


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embedded image







154
(244)


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embedded image







155
(245)


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embedded image







156
(246)


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embedded image







157
(247)


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embedded image







158
(248)


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embedded image







159
(249)


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embedded image







160
(250)


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embedded image







161
(251)


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embedded image







162
(252)


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embedded image







163
(253)


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embedded image







164
(254)


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embedded image







165
(255)


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embedded image







166
(256)


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embedded image







167
(257)


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embedded image







168
(258)


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embedded image







169
(259)


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embedded image







170
(260)


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embedded image







171
(261)


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embedded image







172
(262)


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embedded image







173
(263)


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embedded image







174
(264)


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embedded image







175
(265)


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embedded image







176
(266)


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embedded image







177
(267)


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embedded image







178
(268)


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embedded image







179
(269)


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embedded image







180
(270)


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embedded image







181
(271)


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embedded image







182
(272)


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embedded image







183
(273)


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embedded image







184
(274)


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embedded image







185
(275)


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embedded image







186
(276)


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embedded image







187
(277)


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embedded image







188
(278)


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embedded image







189
(279)


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190
(280)


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191
(281)


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EXAMPLES 192-210

By proceeding in an analogous manner to that described in Examples 11-15, but replacing the compound of formula (100a) by the compound of formula (100c) and utilizing the appropriate coupling components, compounds of formula (21) are obtained, as summarized in the following Table 4.










TABLE 4








(21)




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Example Nr.
Compound Nr.
A′1
A′2





192
(282)


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embedded image







193
(283)


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embedded image







194
(284)


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embedded image







195
(285)


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embedded image







196
(286)


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embedded image







197
(287)


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embedded image







198
(288)


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embedded image







199
(289)


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embedded image







200
(290)


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embedded image







201
(291)


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embedded image







202
(292)


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embedded image







203
(293)


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embedded image







204
(294)


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embedded image







205
(295)


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embedded image







206
(296)


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embedded image







207
(297)


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embedded image







208
(298)


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embedded image







209
(299)


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embedded image







210
(300)


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EXAMPLES 221-229

By proceeding in an analogous manner to that described in Examples 117-119, but replacing the compound of formula (100b) by the compound of formula (100d) and utilizing the appropriate coupling components, compounds of formula (22) are obtained, as summarized in the following Table 5










TABLE 5








(22)




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Example Nr.
Compound Nr.
A′1
A′2





211
(301)


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embedded image







212
(302)


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embedded image







213
(303)


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embedded image







214
(304)


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embedded image







215
(305)


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embedded image







216
(306)


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embedded image







217
(307)


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embedded image







218
(308)


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embedded image







219
(309)


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embedded image







220
(310)


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embedded image







221
(311)


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embedded image







222
(312)


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embedded image







223
(313)


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embedded image







224
(314)


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embedded image







225
(315)


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embedded image







226
(316)


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embedded image







227
(317)


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228
(318)


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229
(319)


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EXAMPLES 230-248

By proceeding in an analogous manner to that described in Examples 11-15, but replacing the compound of formula (100a) by the compound of formula (100e) and utilizing the appropriate coupling components, compounds of formula (23) are obtained, as summarized in the following Table 6.










TABLE 6








(23)




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Example Nr.
Compound Nr.
A′1
A′2





230
(320)


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embedded image







231
(321)


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embedded image







232
(322)


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embedded image







233
(323)


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embedded image







234
(324)


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embedded image







235
(325)


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embedded image







236
(326)


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embedded image







237
(327)


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embedded image







238
(328)


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embedded image







239
(329)


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embedded image







240
(330)


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embedded image







241
(331)


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embedded image







242
(332)


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embedded image







243
(333)


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embedded image







244
(334)


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embedded image







245
(335)


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embedded image







246
(336)


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embedded image







247
(337)


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248
(338)


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EXAMPLES 249-267

By proceeding in an analogous manner to that described in Examples 11-15, but replacing the compound of formula (100a) by the compound of formula (100f) and utilizing the appropriate coupling components, compounds of formula (24) are obtained, as summarized in the following Table 7.










TABLE 7








(24)




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Example Nr.
Compound Nr.
A′1
A′2





249
(339)


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embedded image







250
(340)


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embedded image







251
(341)


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embedded image







252
(342)


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embedded image







253
(343)


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embedded image







254
(344)


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embedded image







255
(345)


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embedded image







256
(346)


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embedded image







257
(347)


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embedded image







258
(348)


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embedded image







259
(349)


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embedded image







260
(350)


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embedded image







261
(351)


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embedded image







262
(352)


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embedded image







263
(353)


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embedded image







264
(354)


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embedded image







265
(355)


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embedded image







266
(356)


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embedded image







267
(357)


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EXAMPLES 268-279

By proceeding in an analogous manner to that described in Examples 121-1, but replacing the compound of formula (100a) by the compound of formula (100g) and utilizing the appropriate coupling components, compounds of formula (25) are obtained, as summarized in the following Table 8.










TABLE 8








(25)




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Example Nr.
Compound Nr.
A′1
A′2





268
(358)


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embedded image







269
(359)


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embedded image







270
(360)


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embedded image







271
(361)


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embedded image







272
(362)


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embedded image







273
(363)


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embedded image







274
(364)


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embedded image







275
(365)


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embedded image







276
(366)


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embedded image







277
(367)


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embedded image







278
(368)


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279
(369)


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EXAMPLES 280-291

By proceeding in an analogous manner to that described in Examples 11-15, but replacing the compound of formula (100a) by the compound of formula (100h) and utilizing the appropriate coupling components, compounds of formula (26) are obtained, as summarized in the following Table 9.










TABLE 9








(26)




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Example Nr.
Compound Nr.
A′1
A′2





280
(370)


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embedded image







281
(371)


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embedded image







282
(372)


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embedded image







283
(373)


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embedded image







284
(374)


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embedded image







285
(375)


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embedded image







286
(376)


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embedded image







287
(377)


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embedded image







288
(378)


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embedded image







289
(379)


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embedded image







290
(380)


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291
(381)


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EXAMPLES 292-362

By proceeding in an analogous manner to that described in Examples 11-15, but replacing the compound of formula (100a) by the compound of formula (100i) and utilizing the appropriate coupling components, compounds of formula (27) are obtained, as summarized in the following Table 10.










TABLE 10








(27)




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Example Nr.
Compound Nr.
A′1
A′2





292
(382)


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embedded image







293
(383)


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embedded image







294
(384)


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embedded image







295
(385)


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embedded image







296
(386)


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embedded image







297
(387)


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embedded image







298
(388)


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embedded image







299
(389)


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embedded image







300
(390)


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embedded image







301
(391)


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embedded image







302
(392)


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embedded image







303
(393)


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embedded image







304
(394)


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embedded image







305
(395)


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embedded image







306
(396)


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embedded image







307
(397)


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308
(398)


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EXAMPLES 363-433

By proceeding in an analogous manner to that described in Examples 11-15, but replacing the compound of formula (100a) by the compound of formula (100J) and utilizing the appropriate coupling components, compounds of formula (28) are obtained, as summarized in the following Table 11.










TABLE 11








(28)




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Example Nr.
Compound Nr.
A′1
A′2













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APPLICATION EXAMPLES
EXAMPLE 434
Unsized without Filler

A mixture consisting of 50% long fibre spruce sulphite bleached and 50% short fibre beech sulphite bleached fibres is suspended in deionised water, as a 2% suspension, and refined and beaten to 22°SR (Schopper Riegler). After dewatering by means of a centrifuge and testing for dry weight, the equivalent to 10 g of dry fibre are placed in a beaker and made up to a volume of 500 ml with tap water. After stirring for 1 hour, 0.42%, based on the weight of dry fibre, of compound (101) as a 5 g/l aqueous solution are added to the furnish suspension and stirring continued for a further 15 minutes. The suspension is made up to 700 ml with water and from 300 ml of the resulting suspension a hand sheet is produced using a Lhomargy sheet former. After drying on a cylinder at 90° C. for 12 minutes, a greenish-yellow dyeing is obtained showing excellent bleed-fastness to water, soda and acetic acid and good light-fastness. The backwater from the dyeing is almost colourless.


EXAMPLE 435
Neutral Sized with Filler

A mixture consisting of 50% long fibre spruce sulphite bleached and 50% short fibre beech sulphite bleached fibres is suspended in deionised water, as a 2% suspension, and refined and beaten to 35°SR (Schopper Riegler). After dewatering by means of a centrifuge and testing for dry weight, the equivalent to 10 g of dry fibre and 2 g of dry chalk filler are placed in a beaker and made up to a volume of 500 ml with tap water. After stirring for 1 hour, 0.78%, based on the weight of dry fibre, of compound (101) as a 5g/l aqueous solution are added to the furnish suspension and stirring continued for a further 15 minutes. 2% of alkyl ketene dimer size is then added, the suspension stirred for 30 minutes, 0.05% retention aid added and the suspension stirred vigorously for a further 5 minutes. The suspension is made up to 700 ml with water and from 300 ml of the resulting suspension a hand sheet is produced using a Lhomargy sheet former. After drying on a cylinder at 90° C. for 12 minutes, a greenish-yellow dyeing is obtained showing excellent fastness values. The backwater from the dyeing is only weakly coloured.

Claims
  • 1. A compound of the formula (13)
  • 2. A compound of formula (13) according to claim 1, in which R3 and R3a both represent hydrogen andA1 and A2, each one independently of the other, is selected from the group consisting ofan acetoacetylated amine of the formula (2)
  • 3. A process for the preparation of a compound of formula (13), according to claim 1, by tetrazotisation of a diaminobenzanilide derivative of the formula
  • 4. A process for dyeing natural or synthetic materials, comprising contacting said materials with a tinctorially effective amount of a compound of the formula (13) according to claim 1, and, optionally, further auxiliaries.
  • 5. A solid dye preparation for dyeing paper, comprising a compound of the formula (13) according to claim 1, and, optionally, further auxiliaries.
  • 6. Aqueous solutions for dyeing paper, comprising a compound of the formula (13), according to claim 1, and, optionally, further auxiliaries.
  • 7. Aqueous solutions according to claim 6 containing, as further auxiliaries, solubilizers and/or organic solvents.
  • 8. Paper which is dyed with a compound of the formula (13), according to claim 1.
  • 9. A process for the preparation of a compound of formula (13), according to claim 1, by tetrazotisation of a diaminobenzanilide derivative of the formula
Priority Claims (1)
Number Date Country Kind
02405456 Jun 2002 EP regional
Parent Case Info

This application is a divisional of U.S. application Ser. No. 10/517,410 filed Dec. 3, 2004, now U.S. Pat. No. 7,341,607, which is a 371 of international application No. PCT/EP03/05561, filed May 27, 2003, the contents of which applications are incorporated by reference.

US Referenced Citations (7)
Number Name Date Kind
2228321 Messmer Jan 1941 A
2544087 Hindermann Mar 1951 A
3078266 Hanhart Feb 1963 A
4213897 Moser et al. Jul 1980 A
5545724 Moser Aug 1996 A
5545725 Käser et al. Aug 1996 A
7341607 Lennartz et al. Mar 2008 B2
Foreign Referenced Citations (1)
Number Date Country
902228 Aug 1962 GB
Related Publications (1)
Number Date Country
20080114158 A1 May 2008 US
Divisions (1)
Number Date Country
Parent 10517410 US
Child 12006730 US