WO2016020111A1

WO2016020111A1 - Novel oxidation dye intermediates of the type of oxy-, thio-, and aza-bis-benzenes

Info

Publication number: WO2016020111A1
Application number: PCT/EP2015/064407
Authority: WO
Inventors: Antje Gebert-Schwarzwälder; Helmut Giesa; Annika Koenen
Original assignee: Henkel Ag & Co. Kgaa
Priority date: 2014-08-06
Filing date: 2015-06-25
Publication date: 2016-02-11
Also published as: DE102014215485A1

Abstract

The invention relates to agents for oxidatively changing the color of keratin fibers, in particular human hair, containing, in a cosmetic carrier (A), at least one oxidation dye intermediate of formula (I) and/or a physiologically acceptable salt thereof, wherein Y1, Y2, and Y4 stand, independently of each other, for a group R5R6N– or for a hydroxy group, Y3 stands for a halogen atom (fluorine, chlorine, bromine, or iodine), for a cyano group, for a group R5R6N–, or for a hydroxy group, X stands for an oxygen atom (–O–), for a sulfur atom (–S–), or for a group –NR7–, R1, R2, R3, and R4 stand, independently of each other, for a hydrogen atom, a C₁-C₆ alkyl group, a C₂-C₆ alkenyl group, a hydroxy C₂-C₆ alkyl group, a polyhydroxy C₂-C₆ alkyl group, a hydroxy group, a C₁-C₆ alkoxy group, an amino group, a group R8R9N–, a cyano group, a C₁-C₆ alkoxy carbonyl group, an aryl group, or a halogen atom (fluorine, chlorine, bromine, or iodine), R5, R6, R7, R8, and R9 stand, independently of each other, for a hydrogen atom, a C₁-C₆ alkyl group, a C₂-C₆ alkenyl group, a hydroxy C₂-C₆ alkyl group, a polyhydroxy C₂-C₆ alkyl group, or an aryl group, with the stipulation that, if X stands for an oxygen atom (–O–) and Y1, Y2, Y3, and Y4 all stand for a group R5R6N–, at least one of the residues from the group R1, R2, R3, and R4 is different from hydrogen.

Description

"New oxidation dye precursors of the oxy, thio and aza-bisbenzene type"

The invention relates to agents for oxidative dyeing change of keratin fibers, in particular human hair, which contain new oxidation dye precursors of the type of oxy, thio and / or aza-bisbenzene. Furthermore, the invention relates to new oxidation dye precursors themselves.

The change in the shape and color of the hair is an important area of modern cosmetics dar. For fashionable color design of hairstyles or lamination of gray hair or even white hair with fashionable or natural colors, the consumer accesses to color-changing agents.

To provide color-changing cosmetic agents, in particular for the skin or keratin-containing fibers such as human hair, the skilled person knows various systems depending on the requirements of the coloration or color change.

For permanent, intensive colorations with corresponding fastness properties, so-called oxidation colorants are used. Such colorants usually contain oxidation dye precursors, so-called developer components and coupler components. The developer components form the actual dyes under the influence of oxidizing agents or of atmospheric oxygen with coupling with one or more coupler components. The oxidation colorants are characterized by intensive, outstanding, long-lasting dyeing results.

During the oxidative dyeing process, developers and couplers diffuse separately into the keratin fiber and under the influence of ammonia as the alkalizing agent (or other alkalizing agent such as monoethanolamine) and an oxidizing agent (usually hydrogen peroxide) chemically react with each other to form the actual dyes. The developers known from the prior art usually do not form any or only very weak, unspecific dyeings and require one or more couplers to produce an intense color shade. The couplers known from the prior art also form only weak dyeings from one another and must be reacted with at least one developer in order to achieve an intense brilliant color result.

For naturally acting dyeings, a mixture of a larger number of oxidation dye precursors is generally used. Thus, for the production of certain nuances usually not the use of a developer with a coupler, but the use of various oxidation dyes of the developer type with various oxidation dyes of the coupler type is necessary. Especially in the development of certain mahogany or mocha nuances (ie nuances with reddish-brown, copper-brown or bronze-brown color failure), the use of six up to ten different oxidation dye precursors become necessary.

The use of a larger number of different oxidation dye precursors may be advantageous in the color fine tuning of the shade, but also has several disadvantages. In the course of the oxidative dyeing process, different developers and couplers give rise to structurally different reaction products which, depending on their respective molecular size, structure and degree of substitution, also have a different affinity for the hair fiber. The various reaction products formed in the course of the oxidative dyeing process therefore differ in terms of their fastness properties and can be washed out of the hair fiber to varying degrees, for example when using a shampoo. The consequence of these differences is a color shift occurring in the course of several washes. Even when exposed to other environmental influences (sunlight, sweat, friction, etc.) can occur due to the different fastness properties of the reaction products, a color shift. The more different oxidation dye precursors are used in the development of a nuance, the greater the risk of a corresponding shade shift on the dyed keratin fibers.

It was the object of the present invention to find new oxidation dye precursors, which enable the generation of the widest possible range of nuances and which require as little as possible other oxidation dye precursors for the generation of this nuance spectrum. The new oxidation dye precursors should form intensive dyeings both in combination with various couplers, but also in reaction with themselves, and thus be as broad as possible combinable.

In the course of the work leading to this invention, it has surprisingly been found that this object can be achieved in an outstanding manner by the use of new oxidation dye voproducts of the formula (I).

A first subject of the invention is an agent for the oxidative color change of keratinic fibers, in particular of human hair, contained in a cosmetic carrier

(A) at least one oxidation dye precursor of the formula (I) and / or its physiologically acceptable salt,

Y2 Y4

wherein

Y1, Y2, Y4 independently of one another for a group R5R6N- or for one Hydroxy group,

Y 3 is a halogen atom (fluorine, chlorine, bromine or iodine), a cyano group, a group R 5 R 6 N- or a hydroxy group,

X represents an oxygen atom (-O-), a sulfur atom (-S-) or a

Group -NR7- stands,

R1, R2, R3, R4 independently of one another represent a hydrogen atom, a C 1 -C 6 -alkyl group, a C 2 -C 6 -alkenyl group, a hydroxy-C 2 -C 6 -alkyl group, a polyhydroxy-C 2 -C 6 -alkyl group, a hydroxy group, a Ο Alkoxy group, an amino group, a group R8R9N-, a cyano group, a Ci-C6-alkoxycarbonyl group, an aryl group or a halogen atom (fluorine, chlorine, bromine or iodine),

R5, R6, R7, R8, R9 independently represent a hydrogen atom, a Ci-C6-alkyl group, a C2-C6-alkenyl group, a hydroxy-C2-C6-alkyl group, a polyhydroxy-C2-C6-alkyl group or an aryl group .

with the proviso that when X is an oxygen atom (-O-) and Y1, Y2, Y3 and Y4 are all a group R5R6N-, at least one of the radicals R1, R2, R3 and R4 is hydrogen is different.

It has been found that the oxidation dye precursors (A) of the formula (I) are outstandingly suitable for use as developers and, in combination with various couplers, provide intense, true-to-color nuances in a wide range of nuances. Furthermore, it has been found to be particularly advantageous that the compounds of the formula (I) according to the invention can also form very intense colors in self-reaction, i. to form an intense color nuance, these compounds need not necessarily be combined with further oxidation dye precursors.

Keratin fibers are wool, furs, feathers and especially human hair. The colorants of the invention can in principle but also for dyeing other natural fibers such. As cotton, jute, sisal, linen or silk, modified natural fibers, such as regenerated cellulose, nitro, alkyl or hydroxyalkyl or acetyl cellulose can be used.

The agents according to the invention contain the oxidation dye precursors (A) of the formula (I) in a cosmetic carrier, preferably in a suitable aqueous, alcoholic or aqueous-alcoholic carrier. For the purpose of hair coloring such carriers are, for example, creams, emulsions, gels or surfactant-containing foaming solutions, such as shampoos, foam aerosols, foam formulations or other preparations which are suitable for use on the hair. However, it is also conceivable to integrate the dye precursors according to formula (I) into a pulverulent or tableted formulation. For the purposes of the present invention, aqueous-alcoholic solutions are to be understood as meaning aqueous solutions containing from 3 to 70% by weight of a C 1 -C 4 -alcohol, in particular ethanol or isopropanol. The compositions of the invention may additionally contain other organic solvents, such as methoxybutanol, benzyl alcohol, ethyl diglycol or 1, 2-propylene glycol. Preference is given to all water-soluble organic solvents.

The term "oxidative color change agent" as used herein refers to oxidative dyeing agents which contain at least one oxidation dye precursor of formula (I) The formation of the dyeing may be effected by the presence of atmospheric oxygen, but preferably by the presence of an oxidizing agent other than atmospheric oxygen. Depending on the amount of oxidizing agent used, the keratin fiber is at the same time lightened more or less strongly during dyeing, since the oxidizing agent not only initiates the dye formation process of developers and couplers, but also the hair-borne pigments. Melanine) oxidatively destroyed.

Depending on the amounts used of the oxidation dye precursors and the oxidizing agent, the oxidative color change may therefore primarily be a coloration (with a high proportion of dyestuff) or, primarily, a lightening (with a high proportion of oxidant). In the latter case, the oxidation dye precursors are used mainly for the nuance of the Aufhellergebnisses.

The agents according to the invention for the oxidative color change of keratinic fibers contain, as an oxidation dye precursor (A) essential to the invention, one or more compounds of the formula (I). Examples of the substituents Y1, Y2, Y3, Y4, X, R1, R2, R3, R4, R5, R6, R7, R8 and R9 mentioned in formula (I) are given by way of example below:

A hydroxy group means a group -OH. Examples of C 1 -C 6 -alkyl radicals are -CH ₃ , -CH ₂ CH ₃ , -CH ₂ CH ₂ CH ₃ , -CH (CH ₃ ) 2, -CH ₂ CH ₂ CH ₂ CH ₃ , -CH ₂ CH (CH ₃ ) 2, -CH (CH ₃ ) CH ₂ CH ₃ , -C (CH ₃ ) ₃ , - (CH 2) 4 CH ₃ , - (CH 2) 5 CH ₃ . Particularly preferred alkyl radicals are methyl and ethyl. Examples of C2-C6 alkenyl groups are prop-2-enyl (allyl group), 2-methyl-prop-2-enyl, but-3-enyl, but-2-enyl, pent-4-enyl or pent-3-enyl , Examples of C 1 -C 6 hydroxyalkyl groups are -CH ₂ OH, CH ₂ CH ₂ OH, -CH ₂ CH ₂ CH ₂ OH, -CH ₂ CH (OH) CH ₃ , -CH ₂ CH ₂ CH ₂ CH ₂ OH, with -CH ₂ CH ₂ OH being preferred. Examples of C 2 -C 6 polyhydroxyalkyl groups are 2,3-dihydroxypropyl group, 3,4-dihydroxybutyl group, 2,4-dihydroxybutyl group and 1, 2-dihydroxyethyl group. Examples of O-Ce-alkoxy groups are -OCH ₃ , -OCH ₂ CH ₃ , -OCH ₂ CH ₂ CH ₃ , -OCH (CH ₃ ) ₂ or -OC (CH ₃ ) ₃ , preferred is the methoxy group (-OCH ₃ ). An amino group means a group -NH2. A cyano group means a group -C ^ N. Examples of a C 1 -C 6 -alkoxycarbonyl group are a methoxycarbonyl group (H ₃ COC (O) -) an ethoxycarbonyl group, an n-propoxycarbonyl group. The phenyl group is a preferred example of an aryl group. Examples of halogen are fluorine, chlorine, bromine or iodine. Preferred halogen atoms are fluorine, chlorine and bromine. In the case of the oxidation dye precursors of the formula (I) according to the invention, the proviso is that when X is an oxygen atom (-O-) and Y1, Y2, Y3 and Y4 all represent a group R5R6N-, at least one of the radicals R1, R2 , R3 or R4 is different from hydrogen. This means that in compounds of the formula (Ia)

at least one of the radicals R1, R2, R3 or R4 may not stand for a hydrogen atom.

By choosing suitable substituents R1 to R4, both the absorption of the compounds on the hair can be optimized as well as their Nuancenausfall be modified. The oxidation dye precursors of the formula (I) in which R 1 and R 2 independently of one another are hydrogen, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkoxy group or a halogen atom (fluorine, chlorine, bromine or iodine) are preferred since These dyes were particularly intense dyeings could be obtained.

Particularly preferably, the radicals R 1 and R 2 independently of one another represent a hydrogen atom or a C 1 -C 6 -alkyl group. Among the C 1 -C 6 -alkyl groups, the methyl group is very particularly preferred.

In a preferred embodiment, an agent according to the invention is therefore characterized in that it contains at least one oxidation dye precursor of the formula (I) in which R 1 and R 2 independently of one another represent hydrogen or a C 1 -C 6 -alkyl group.

In a very particularly preferred embodiment, an agent according to the invention is characterized in that it contains at least one oxidation dye precursor of the formula (I) in which R 1 and R 2 independently of one another represent hydrogen or a methyl group.

Furthermore, it has been found to be advantageous if oxidation dye precursors of the formula (I) are used in which R3 and R4 independently of one another are hydrogen, a C1-C6-alkyl group, a hydroxy group, a Ci-C6-alkoxy group, or an amino group. Particularly preferably, R 3 and R 4 independently of one another represent a hydrogen atom or a C 1 -C 6 -alkyl group, in particular hydrogen or a methyl group.

In a further preferred embodiment, an agent according to the invention is therefore characterized in that it contains at least one oxidation dye precursor of the formula (I) in which R 3 and R 4, independently of one another, are hydrogen or a C 1 -C 6 -alkyl group.

In a further preferred embodiment, an agent according to the invention is characterized in that it contains at least one oxidation dye precursor of the formula (I) in which R3 and R4 independently represent hydrogen or a methyl group. The substituent X may represent an oxygen atom (-O-), a sulfur atom (-S-) or a group -NR7-. Via the substituent X, the two aromatic systems of the oxidation dye precursors of the formula (I) are linked together. At the same time, the substituent X is an electron-rich heteroatom (with lone pairs of electrons), which activates the two aromatic systems, so that both ring systems are capable of reacting with further oxidation dye precursors or of reacting with themselves. Together with the radicals R 1 to R 4, the grouping X also influences the nuance loss which arises during the oxidative dyeing process.

When X is a group -NR7-, then R7 is preferably a hydrogen atom for steric reasons. However, it has proved to be preferred when X is an oxygen atom (--0-) or when X is a sulfur atom (-S-)

In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains at least one oxidation dye precursor of the formula (I) in which X represents an oxygen atom (-O-) or a sulfur atom (-S-).

In the oxidation dye precursors of the formula (I), the radicals Y1, Y2 and Y4 independently of one another can stand for a group R5R6N- or for a hydroxy group. The radical Y3 may be a halogen atom (fluorine, chlorine, bromine or iodine), a cyano group, a group R5R6N- or a hydroxy group.

In a further preferred embodiment, an agent according to the invention is characterized in that it contains at least one oxidation dye precursor of the formula (I) in which at least one of the radicals from the group Y1, Y2, Y3 and Y4 stands for an amino group.

Particularly good dyeing properties can be achieved if oxidation dye precursors of the formula (I) are used in which the radicals Y1 and / or Y3 are each a group R5R6N-.

Herein, R5 and R6 may independently represent a hydrogen atom, a C1-C6 alkyl group, a C2-C6 alkenyl group, a hydroxy-C2-C6 alkyl group, a polyhydroxy-C2-C6 alkyl group or an aryl group. Preferably, the radicals R5 and R6 independently of one another represent a hydrogen atom or a C1-C6-alkyl group. Most preferably, R5 and R6 are both hydrogen.

Thus, in a most preferred embodiment, Y1 and / or Y3 each represents a group R5R6N- in which R5 and R6 each represent a hydrogen atom, i.

Y1 and / or Y3 are particularly preferably an amino group.

In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in that it comprises at least one oxidation dye precursor of the formula (I) in which Y1 is an amino group and / or Y3 is an amino group. In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains at least one oxidation dye precursor of the formula (I) in which Y1 is an amino group or Y3 is an amino group.

In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains at least one oxidation dye precursor of the formula (I) in which Y1 is an amino group and Y3 is an amino group.

In the oxidation dye precursors of the formula (I), the radicals Y 2 and Y 4 can independently of one another stand for a group R 5 R 6 N- or for a hydroxy group. Also the choice of the leftovers

Y2 and Y4 is responsible for the absorption properties and the nuance failure in the oxidative

Coloring resulting dyes significantly.

In this connection, the radicals R 5 and R 6 can independently of one another represent a hydrogen atom, a C 1 -C 6 -alkyl group, a C 2 -C 6 -alkenyl group, a hydroxy-C 2 -C 6 -alkyl group, a polyhydroxy-C 2 -C 6 -alkyl group or an aryl group , Preferably, the radicals R5 and R6 independently of one another represent a hydrogen atom or a C 1 -C 6 -alkyl group. Most preferably, R5 and R6 are both hydrogen.

Thus, in a most preferred embodiment, Y 2 and Y 4 independently represent a hydroxy group or a group R 5 R 6 N- in which R 5 and R 6 each represent a hydrogen atom, i. Y 2 and Y 4 very particularly preferably independently of one another represent a hydroxyl group or an amino group.

For the development of natural brown shades, it has proven to be advantageous if Y2 and Y4 represent different radicals. When oxidation dye precursors of formula (I) are used in which Y2 is a hydroxy group and Y4 is an amino group, or in which Y2 is an amino group and Y4 is a hydroxy group, brown shades with an attractive bronze tone can be obtained.

In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains at least one oxidation dye precursor of the formula (I) in which

- Y2 is a hydroxy group and Y4 is an amino group or

- Y2 is an amino group and Y4 is a hydroxy group.

It is furthermore very particularly preferred if the radicals R 1 and R 2 both represent a hydrogen atom, one of the radicals of R 3 and R 4 is a hydrogen atom, and the other radical of R 3 and R 4 is a methyl group.

In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains at least one oxidation dye precursor of the formula (I) in which R 1 and R 2 both represent a hydrogen atom, one of the radicals R 3 and R 4 represents a hydrogen atom and other of R3 and R4 is methyl. Compounds of the formula (I) in which R 1 is a hydrogen atom, R 2 is a hydrogen atom, R 3 is a hydrogen atom and R 4 is a methyl group have particularly good performance properties and are therefore preferred.

The compounds of the formula (I) in which R 1 is a hydrogen atom, R 2 is a hydrogen atom, R 3 is a methyl group and R 4 is a hydrogen atom have particularly good performance properties and are therefore also preferred. In a further particularly preferred embodiment, an agent according to the invention is characterized in that it comprises at least one oxidation dye precursor of the formula (I) which is selected from

4-Amino-2 - [(2,5-diaminophenyl) amino] benzonitrile

4-A ydroxyphenyl) amino] benzonitrile

4-amino-2 - benzonitrile [(5-amino-2-hydroxyphenyl) amino]

2 - [(2-diaminophenyl) amino] -4-hydroxybenzonitrile

4-amino-2- (2,5-diaminophenoxy) benzonitrile

- (2,5-diaminophenoxy) -4-hydroxybenzonitrile

- (2-amino-5-hydroxyphenoxy) -4-hydroxybenzonitrile

- (5-amino-2-hydroxyphenoxy) -4-hydroxybenzonitrile -A phenyl) sulfanyl] benzonitrile-A ydroxyphenyl) sulfanyl] benzonitrile

-Amino-2 - [(5-amino-2-hydroxyphenyl) sulfanyl] benzonitrile - [(lfanyl] -4-hydroxybenzonitrile

- [(2-amino-5-hydroxyphenyl) sulfanyl] -4-hydroxybenzonitrile

Amino-2-hydroxyphenyl) sulfanyl] -4-hydroxybenzonitrile

-N- (5-amino-2-chlorophenyl) benzyl-1,2,4-triamine-A-chlorophenyl) -aryrino] phenol

-Amino-2 - phenol [(5-amino-2-chlorophenyl) anriino]

-Chloro-3 - [(2,5-diaminophenyl) amino] phenol

- (5-amino-2-chlorophenoxy) benzene-1,4-diamine

Chloro-3- (2,5-diaminophenoxy) phenol-A-oxyphenoxy) phenol

phenol amino-2- (2-chloro-5-hydroxyphenoxy)

-Amino-2 - benzonitrile [(2,5-diaminophenyl) amino] -A ydroxyphenyl) anriino] benzonitrile

-Amino-2 - [(5-amino-2-hydroxyphenyl) -anilino] benzonitrile - [(ino] -4-hydroxybenzonitrile-A-enoxy) -benzonitrile- (-hydroxybenzonitrile

- (2-amino-5-hydroxyphenoxy) -4-hydroxybenzonitrile

- (5-amino-2-hydroxyphenoxy) -4-hydroxybenzonitrile-A phenyl) sulfanyl] benzonitrile-A ydroxyphenyl) sulfanyl] benzonitrile

-Amino-2 - [(5-amino-2-hydroxyphenyl) sulfanyl] benzonitrile [(2-lfanyl) -4-hydroxybenzonitrile

- [(2-amino-5-hydroxyphenyl) sulfanyl] -4-hydroxybenzonitrile

- [(5-amino-2-hydroxyphenyl) sulfanyl] -4-hydroxybenzonitrile-N-enyl) benzyl-1,2,4-triamine-A-chlorophenyl) -anilino] phenol

-Amino-2 - [(5-amino-2-chloro-phenyl) -aryrino] -phenol-C-phenyl) -amino] -phenol

- (5-amino-2-chlorophenoxy) benzene-1,4-diamine -C enoxy) phenol

-A roxyphenoxy) phenol

phenol amino-2- (2-chloro-5-hydroxyphenoxy)

- [(5-amino-2-chlorophenyl) sulfanyl] benzene-1,4-diamine-A-chlorophenyl) sulfanyl] phenol

-Amino-2 - phenol [(5-amino-2-chlorophenyl) sulfanyl] -C phenyl) sulfanyl] phenol-A ydroxyphenyl) sulfanyl] phenol

-Amino-2 - [(2-chloro-5-hydroxyphenyl) sulfanyl] phenol-N-benzene-1,2,4-triamine-A-ylene) anriino] phenol

-Amino-3 - [(2,5-diaminophenyl) anriino] phenol -A droxyphenyl) anriino] phenol-A droxyphenyl) anriino] phenol-A droxyphenyl) anriino] phenol-A phenoxy) phenol

-Ahenoxy) phenol

Amino-2- (2-amino-5-hydroxyphenoxy) phenol

-Amino-2- (5-amino-2-hydroxyphenoxy) phenol-A-oxyphenoxy) phenol

- [(2,5-Diaminophenyl) sulfanyl] benzene-1,4-diamine-anhenylsulfanyl] phenol-anenyl) sulfanyl] phenol

-Amino-2 - phenol [(5-amino-2-hydroxyphenyl) sulfanyl]

-Amino-3 - [(2-amino-5-hydroxyphenyl) sulfanyl] phenol-A-ydroxyphenyl) sulfanyl] phenol

N- (2,5-diaminophenyl) -5-methylbenzene-1,2,4-triamine

Amino-2 - [(2,5 ^■ diamino-4-nriethylphenyl) anriino] phenol

-Amino-3 - [(2,5 ^■ diamino-4-nriethylphenyl) anriino] phenol

Amino-5 - [(5-amino-2-hydroxyphenyl) anriino] -2-nriethylphenol -A xyphenyl) anriino] -5-nriethylphenol

-Amino-3 - [(2-amino-5-hydroxyphenyl) anriino] -2-nriethylphenol

- (2, -diaminophenoxy) -5-methylbenzene-1,4-diamine

-A ethylphenoxy) phenol

-Amino-5- (5-amino-2-hydroxyphenoxy) -2-methylphenol

-2- (5-amino-2-hydroxyphenoxy) -5-methylphenol

-Amino-5- (2-amino-5-hydroxyphenoxy) -2-nriethylphenol

- [(2,5-diaminophenyl) sulfanyl] -5-methylbenzene-1,4-dianitrile

-Amino-2 - phenol [(2,5-diamino-4-nriethylphenyl) sulfanyl]

-Amino-3 - phenol [(2,5-diamino-4-nriethylphenyl) sulfanyl]

Amino-2 - [(5-amino-2-hydroxyphenyl) sulfanyl] -5-nriethylphenol

-Amino-3 - [(2-amino-5-hydroxyphenyl) sulfanyl] -6-nriethylphenol

-Amino-2 - [(2-amino-5-hydroxyphenyl) sulfanyl] -5-methylphenol

-N-diamino-4-methylphenyl) -5-methylbenzene-1, 2,4-triamine

-Amino-2 - [(2,5-diamino-4-methylphenyl) amino] -5-methylphenol-A-ylphenyl) amino] -6-methylphenol

Amino-5 - [(5-amino-2-hydroxy-4-methylphenyl) amino] -2-methylphenol -A4-methylphenyl) amino] -5-methylphenol

-3 - [(2-amino-5-hydroxy-4-methylphenyl) anriino] -6-nriethylphenol

- (2-diamino-4-methylphenoxy) -5-n-triethylbenzene-1,4-diamine

Amino-2- (2,5-diamino-4-nriethylphenoxy) -5-nriethylphenol

-A ylphenoxy) -6-nriethylphenol

-Amino-5- (5-amino-2-hydroxy-4-nriethylphenoxy) -2-nriethylphenol

-2- (5-amino-2-hydroxy-4-methylphenoxy) -5-nriethylphenol

-Amino-5- (2-amino-5-hydroxy-4-nriethylphenoxy) -2-nriethylphenol

- [(2,5-diamino-4-methylphenyl) sulfanyl] -5-methylbenzene-1,4-diamine

Amino-2 - [(2,5-diamino-4-methylphenyl) sulfanyl] -5-methylphenol

-Amino-3 - [(2,5-diamino-4-methylphenyl) sulfanyl] -6-methylphenol

Amino-2 - [(5-amino-2-hydroxy-4-methylphenyl) sulfanyl] -5-methylphenol

4-Amino-3 - [(2-amino-5-hydroxy-4-methylphenyl) sulfanyl] -6-methylphenol and / or

4-Amino-2 - [(2-amino-5-hydroxy-4-methylphenyl) sulfanyl] -5-methylphenol

Within the aforementioned group, the following compounds have a particularly strong self-coupling ability, i. With the following compounds, a very intense color result could be achieved even without the addition of other oxidation dye precursors. The use of one or more oxidation dyes of the formula (I) from the following group is therefore explicitly very explicitly preferred:

2-N- (2,5-diaminophenyl) benzene-1, 2,4-triamine

4-Amino-2 - [(2,5-diaminophenyl) amino] phenol

4-amino-3 - [(2,5-diaminophenyl) amino] phenol

4-amino-3 - [(5-amino-2-hydroxyphenyl) amino] phenol

4-Amino-2 - [(5-amino-2-hydroxyphenyl) amino] phenol

4-amino-3 - [(2-amino-5-hydroxyphenyl) amino] phenol

4-amino-2- (2,5-diaminophenoxy) phenol

4-amino-3- (2,5-diaminophenoxy) phenol

4-amino-2- (2-amino-5-hydroxyphenoxy) phenol

4-amino-2- (5-amino-2-hydroxyphenoxy) phenol

4-Amino-3- (2-amino-5-hydroxyphenoxy) phenol

2 - [(2,5-diaminophenyl) sulfanyl] benzene-1,4-diamine

4-Amino-2 - [(2,5-diaminophenyl) sulfanyl] phenol

4-amino-3 - [(2,5-diaminophenyl) sulfanyl] phenol

4-Amino-2 - [(5-amino-2-hydroxyphenyl) sulfanyl] phenol 4-amino-3 - [(2-amino-5-hydroxyphenyl) sulfanyl] phenol

4-amino-3 - [(5-amino-2-hydroxyphenyl) sulfanyl] phenol

2-N- (2,5-diaminophenyl) -5-methylbenzene-1, 2,4-triamine

4-Amino-2 - [(2,5-diamino-4-methylphenyl) amino] phenol

4-amino-3 - [(2,5-diamino-4-methylphenyl) amino] phenol

4-amino-5 - [(5-amino-2-hydroxyphenyl) amino] -2-methylphenol

4-Amino-2 - [(5-amino-2-hydroxyphenyl) amino] -5-methylphenol

4-amino-3 - [(2-amino-5-hydroxyphenyl) amino] -2-methylphenol

2- (2,5-Diaminophenoxy) -5-methylbenzene-1,4-diamine

4-amino-2- (2,5-diamino-4-methylphenoxy) phenol

4-amino-3- (2,5-diamino-4-methylphenoxy) phenol

4-amino-5- (5-amino-2-hydroxyphenoxy) -2-nriethylphenol

4-amino-2- (5-amino-2-hydroxyphenoxy) -5-nriethylphenol

4-amino-5- (2-amino-5-hydroxyphenoxy) -2-nriethylphenol

2 - [(2,5-diaminophenyl) sulfanyl] -5-methylbenzene-1,4-diamine

4-Amino-2 - [(2,5-diamino-4-methylphenyl) sulfanyl] phenol

4-amino-3 - [(2,5-diamino-4-methylphenyl) sulfanyl] phenol

4-Amino-2 - [(5-amino-2-hydroxyphenyl) sulfanyl] -5-methylphenol

4-amino-3 - [(2-amino-5-hydroxyphenyl) sulfanyl] -6-methylphenol

4-Amino-2 - [(2-amino-5-hydroxyphenyl) sulfanyl] -5-methylphenol

2-N- (2,5-diamino-4-methylphenyl) -5-methylbenzene-1, 2,4-triamine

The oxidation dye precursors (A) of the formula (I) according to the invention are amino compounds (if at least one of the radicals Y1, Y2, Y3, Y4 represents a group R5R6N-). These can also be used in the form of their physiologically tolerated salts, in particular the chlorides, the sulfates and bromides. Further preferred salts are derived from sulfonic acids, such as benzenesulfonates, p-toluenesulfonyl sulfonates, C 1 -C 4 -alkanesulfonates or trifluoromethanesulfonates. Depending on the number of amino groups present in the compounds according to the invention, mono-, di-, tri-, tetra- and higher adducts may be present as salts. The physiologically acceptable salts of the oxidation dye precursors (A) of the formula (I) are in particular the hydrochlorides, the hydrobromides and the sulfates of these compounds.

The developers commonly known from the prior art do not form any dyes with themselves or only weak, unspecific dyeings. However, the oxidation dye precursors (A) of the formula (I) are capable of forming dyes together with couplers as well as with themselves.

Due to the aforementioned properties, it is advantageous to use the compounds of the formula (I) as main oxidation dye precursors (A). Although further oxidation dye precursors of the developer and / or of the coupler type may indeed be present in the agents according to the invention, these are preferably contained in the agents only in minor minor amounts.

The oxidation dye precursor or products (A) of the formula (I) can be used in the compositions according to the invention in a total amount of from 0.001 to 5.0% by weight, preferably from 0.1 to 4.5% by weight, more preferably from 0 From 2 to 4.0% by weight, and more preferably from 0.3 to 3.5% by weight, based on the total weight of the composition.

In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in that it comprises (A) one or more oxidation dye precursors of the formula (I) in a total amount of from 0.001 to 5.0% by weight, preferably from 0.1 to 4, 5 wt .-%, more preferably from 0.2 to 4.0 wt .-% and particularly preferably from 0.3 to 3.5 wt .-% - based on the total weight of the composition - contains.

As already mentioned above, the agents according to the invention for the oxidative color change of keratinic phases may additionally contain further oxidation dye precursors of the developer type (numbered as oxidation dye precursors from group (B)), which are structurally different from the compounds of formula (I).

Preferred further developer components are selected from p-phenylenediamine, p-toluenediamine, 2- (2-hydroxyethyl) -p-phenylenediamine, 2- (1, 2-dihydroxyethyl) -p-phenylenediamine, N, N-bis (2 - hydroxyethyl) -p-phenylenediamine, 2-methoxymethyl-p-phenylenediamine, N- (4-amino-3-methylphenyl) - N- [3- (1 H -imidazol-1-yl) propyl] amine, N, N 'Bis (2-hydroxyethyl) -N, N'-bis (4-aminophenyl) -1, 3-diamino-propan-2-ol, bis (2-hydroxy-5-aminophenyl) methane, 1, 3-Bis- (2,5-diaminophenoxy) -propan-2-ol, N, N'-bis (4-aminophenyl) -1, 4-diazacycloheptane, 1, 10-bis- (2,5-diaminophenyl) 1, 4,7,10-tetra-oxadecane, 4-aminophenol, 4-amino-3-methylphenol, 4-amino-2-aminomethylphenol, 4-amino-2- (1, 2-dihydroxyethyl) phenol and Amino-2- (diethylaminomethyl) phenol, 4,5-diamino-1- (2-hydroxyethyl) pyrazole, 2,4,5,6-tetraaminopyrimidine, 4-hydroxy-2,5,6-triaminopyrimidine, 2- Hydroxy-4,5,6-tri- aminopyrimidine, as well as the physiologically acceptable salts of these compounds. Particularly preferred additional developer components are p-toluenediamine, 2- (2-hydroxyethyl) -p-phenylenediamine, 2-methoxymethyl-p-phenylenediamine, N- (4-amino-3-methylphenyl) -N- [3- (1H - Imidazol-1 -yl) propyl] amine and / or 4,5-diamino-1- (2-hydroxyethyl) pyrazole and their physiologically acceptable salts.

The oxidation dyes of the formula (I) react with the developers (B) from the group consisting of p-phenylenediamine, p-toluenediamine, 2- (2-hydroxyethyl) -p-phenylenediamine, N, N-bis (2) hydroxyethyl) -p-phenylenediamine, 2-methoxymethyl-p-phenylenediamine, N- (4-amino-3-methylphenyl) -N- [3- (1H-imidazol-1-yl) propyl] amine, bis (2 -hydroxy-5-aminophenyl) methane, 4-aminophenol, 4-amino-3-methylphenol, 4,5-diamino-1- (2-hydroxyethyl) pyrazole, 2,4,5,6-tetraaminopyrimidine, 4-hydroxy 2,5,6-triaminopyrimidine and / or 2-hydroxy-4,5,6-triaminopyrimidine. Out For this reason, the use of these developers (B) and / or their physiologically acceptable salts is particularly preferred.

In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in that it additionally contains (B) one or more oxidation dye precursors from the group formed from p-phenylenediamine, p-toluenediamine, 2- (2-hydroxyethyl) -p phenylenediamine, N, N-bis- (2-hydroxyethyl) -p-phenylenediamine, 2-methoxymethyl-p-phenylenediamine, N- (4-amino-3-methylphenyl) -N- [3- (1H-imidazole) 1 -yl) propyl] amine, bis (2-hydroxy-5-aminophenyl) methane, 4-aminophenol, 4-amino-3-methylphenol, 4,5-diamino-1- (2-hydroxyethyl) pyrazole, 2 , 4,5,6-tetraaminopyrimidine, 4-hydroxy-2,5,6-triaminopyrimidine, 2-hydroxy-4,5,6-triamino-pyrimidine and / or their physiologically acceptable salts.

The compositions according to the invention may in principle contain one or more developer components from group (B) in a total amount of from 0.001 to 10.0% by weight, based on the total weight of the composition. It is advantageous, however, to use the oxidation dye precursors (A) of the formula (I) as the main dyes and to use the other developers from group (B) only for nuancing in smaller amounts. For this reason, it is preferred for the oxidative color change agents to contain one or more oxidation dye precursors from group (B) in a total amount of not more than 3.0% by weight, preferably not more than 1.5% by weight.

In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains one or more oxidation dye precursors from group (B) in a total amount of from 0.001 to 3.0% by weight, preferably from 0.025 to 1.5% by weight. %, more preferably from 0.05 to 1, 0 wt .-% and particularly preferably from 0, 1 to 0.5 wt .-% - based on the total weight of the composition - contains.

The oxidation dye precursor or products (A) of the formula (I) are preferably used as the developer-type compounds which are essentially responsible for the formation of the dyes. For this reason, it is also preferred to use the oxidation dye precursors (A) of the formula (I) in each case in higher quantitative ranges than the further developers from group (B).

Particularly good color results can be obtained if the weight ratio of all the oxidation dye precursors (A) of the formula (I) present in the composition to all the oxidation dye precursors of the groups (B) i. the weight ratio (A) / (B), at a value of at least 1, 0, preferably at a value of at least 1, 1, more preferably at a value of at least 1, 2 and particularly preferably at a value of at least 1.3 lies.

Example: An agent according to the invention contains

(A) 0.7% by weight of 2-N- (3-amino-4-methylphenyl) benzene-1, 2,4-triamine, tetrahydrochloride

(B) 0.5% by weight of p-toluenediamine, sulfate

Weight ratio (A) / (B) = 1, 4 In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in that the weight ratio of all oxidation dye precursors (A) of the formula (I) to all oxidation dye precursors from group (B), ie the weight ratio ( A) / (B), at a value of at least 1, 0, preferably at a value of at least 1, 1, more preferably at a value of at least 1, 2 and particularly preferably at a value of at least 1.3.

Coupler components do not form a significant color within the framework of the oxidative dyeing alone, but always require the presence of developer components. Coupler components permit at least one substitution of a chemical residue of the coupler by the oxidized form of the developer component. Covalent bonds form between coupler and developer components.

As coupler component suitable according to the invention, preference is given to selecting at least one compound from one of the following classes:

m-aminophenol and / or its derivatives,

m-diaminobenzene and / or its derivatives,

o-diaminobenzene and / or its derivatives,

o-aminophenol derivatives, such as o-aminophenol,

Naphthalene derivatives having at least one hydroxy group,

Di- or trihydroxybenzene and / or derivatives thereof,

- pyridine derivatives,

- pyrimidine derivatives,

Monohydroxyindole derivatives and / or monoamine indole derivatives,

Monohydroxyindoline derivatives and / or monoaminoindoline derivatives,

Pyrazolone derivatives such as 1-phenyl-3-methylpyrazol-5-one,

Morpholine derivatives, such as, for example, 6-hydroxybenzomorpholine or 6-aminobenzomorpholine,

- Chinoxalinderivate, such as 6-methyl-1, 2,3,4-tetrahydroquinoxaline.

Mixtures of two or more compounds from one or more of these classes are also within the scope of this embodiment according to the invention.

The couplers from the group (C) form in combination with the oxidation dye precursors of the formula (I) very intense colorations, therefore, the couplers (C) are preferred, which are selected from 3-aminophenol, 5-amino-2-methylphenol, 3rd -Amino-2-chloro-6-methylphenol, 2-hydroxy-4-aminophenoxyethanol, 5-amino-4-chloro-2-methylphenol, 5- (2-hydroxyethyl) amino-2-methylphenol, 2,4-dichloro 3-aminophenol, 2-aminophenol, 3-phenylenediamine, 2- (2,4-diaminophenoxy) ethanol, 1, 3-bis (2,4-diaminophenoxy) propane, 1-methoxy-2-amino-4- (2 -hydroxyethylamino) benzene, 1, 3-bis (2,4-diaminophenyl) propane, 2,6-bis (2'-hydroxyethylamino) -1-methylbenzene, 2 - ({3 - [(2-hydroxyethyl) amino] ] -4-methoxy-5-methylphenyl} amino) ethanol, 2 - ({3 - [(2-hydroxyethyl) amino] -2-methoxy-5-methylphenyl} amino) ethanol, 2 - ({3 - [(2 -Hydroxyethyl) amino] -4,5-dimethylphenyl} amino) ethanol, 2- [3-morpholin-4-yl-phenyl) -amino] -ethanol, 3-amino-4- (2-methoxy-ethoxy) -5-methyl-phenylamine, 1-amino-3-bis- (2-hydroxy-ethyl) -amino-benzene, resorcinol, 2-methylresorcinol, 4-chlororesorcinol, 1, 2,4-tri-hydroxybenzene, 2-amino-3-hydroxypyridine, 3-amino-2-methylamino-6-methoxypyridine, 2,6-dihydroxy-3,4-dimethylpyridine, 3, 5-diamino-2,6-dimethoxypyridine, 1-phenyl-3-methylpyrazol-5-one, 1-naphthol, 1, 5-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 1, 7-dihydroxynaphthalene, 1, 8-di- hydroxynaphthalene, 4-hydroxyindole, 6-hydroxyindole, 7-hydroxyindole, 4-hydroxyindoline, 6-hydroxyindoline and / or 7-hydroxyindoline and their physiologically acceptable salts.

In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in that it additionally contains (C) one more number of oxidation dye precursors from the group which is formed from 3-aminophenol, 5-amino-2-methylphenol, 3-amino-2 -chloro-6-methylphenol, 2-hydroxy-4-aminophenoxyethanol, 5-amino-4-chloro-2-methylphenol, 5- (2-hydroxyethyl) amino-2-methylphenol, 2,4-dichloro-3-aminophenol , 2-Aminophenol, 3-phenylenediamine, 2- (2,4-diaminophenoxy) ethanol, 1, 3-bis (2,4-diaminophenoxy) propane, 1-methoxy-2-amino-4- (2-hydroxyethylamino) benzene , 1, 3-bis (2,4-diaminophenyl) propane, 2,6-bis (2'-hydroxyethylamino) -1-methylbenzene, 2 - ({3 - [(2-hydroxyethyl) amino] -4- methoxy-5-methylphenyl} amino) ethanol, 2 - ({3 - [(2-hydroxyethyl) amino] -2-methoxy-5-methylphenyl} amino) ethanol, 2 - ({3 - [(2-hydroxyethyl ) amino] -4,5-dimethylphenyl} amino) ethanol, 2- [3-morpholin-4-ylphenyl) amino] ethanol, 3-amino-4- (2-methoxyethoxy) -5-methylphenylamine, 1-amino

3-bis (2-hydroxyethyl) aminobenzene, resorcinol, 2-methylresorcinol, 4-chlororesorcinol, 1, 2,4-trihydroxybenzene, 2-amino-3-hydroxypyridine, 3-amino-2-methylamino-6-methoxypyridine , 2,6-dihydroxy-3,4-dimethylpyridine, 3,5-diamino-2,6-dimethoxypyridine, 1-phenyl-3-methylpyrazol-5-one, 1-naphthol, 1, 5-dihydroxynaphthalene, 2.7 Dihydroxynaphthalene, 1,7-dihydroxynaphthalene, 1,8-dihydroxynaphthalene,

4-hydroxyindole, 6-hydroxyindole, 7-hydroxyindole, 4-hydroxyindoline, 6-hydroxyindoline, 7-hydroxyindoline and / or their physiologically acceptable salts.

The agents according to the invention may in principle contain one or more coupler components from group (C) in a total amount of from 0.001 to 10.0% by weight, based on the total weight of the composition. However, the coupler (s) from the group (C) is preferably in the total amount of from 0.001 to 5.0% by weight, preferably from 0.025 to 4.5% by weight, more preferably from 0.05 to 4 , 0 wt .-% and particularly preferably from 0, 1 to 3.5 wt .-% - based on the total weight of the composition - included.

In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains one or more oxidation dye precursors from group (C) in a total amount of from 0.001 to 5.0% by weight, preferably from 0.025 to 4.5% by weight. %, more preferably from 0.05 to 4.0 wt .-% and particularly preferably from 0.1 to 3.5 wt .-% - based on the total weight of the composition - contains.

All of the abovementioned quantities for the total amount of the oxidation dye precursors (A) of the formula (I) in the composition according to the invention relate to the total weight of the compounds of the formula (I) in the color cream, ie in the storage-stable formulation prior to preparation of the application mixture and before mixing with a second, oxidant-containing component.

All of the abovementioned quantities for the total amount of the oxidation dye precursors (B) in the composition according to the invention relate to their total weight in the color cream, i. in the storage stable formulation prior to preparation of the application mixture and prior to mixing with a second, oxidant-containing component.

All of the abovementioned quantities for the total amount of the oxidation dye precursors (C) in the composition according to the invention relate to their total weight in the color cream, i. in the storage stable formulation prior to preparation of the mixture of admixture and before mixing with a second, oxidizer-containing component.

The agents according to the invention may additionally contain at least one substantive dye. These are dyes that raise directly on the hair and do not require an oxidative process to form the color. Direct dyes are usually nitrophenylenediamines, nitroaminophenols, azo dyes, anthraquinones, triarylmethane dyes or indophenols.

The substantive dyes are each preferably used in an amount of 0.001 to 20 wt .-%, in particular from 0.05 to 5 wt .-%, each based on the total application preparation. The total amount of substantive dyes is preferably at most 3% by weight.

Direct dyes may be subdivided into anionic, cationic and nonionic substantive dyes which are selected and used by those skilled in the art according to the requirements of the carrier base.

Preferred anionic substantive dyes are those having the international designations or trade names bromophenol blue, tetrabromophenol blue, Acid Yellow 1, Yellow 10, Acid Yellow 23, Acid Yellow 36, Acid Orange 7, Acid Red 33, Acid Red 52, Pigment Red 57: 1, Acid Blue 7, Acid Green 50, Acid Violet 43, Acid Black 1 and Acid Black 52 known compounds.

Preferred cationic substantive dyes are Basic Blue 7, Basic Blue 26, Basic Violet 2 and Basic Violet 14, Basic Yellow 57, Basic Red 76, Basic Blue 16, Basic Blue 347 (Cationic Blue 347 / Dystar), HC Blue No. 16, Basic Brown 16, Basic Brown 16, Basic Brown 17, Yellow 87, Basic Orange 31 and Basic Red 51.

Suitable nonionic substantive dyes are in particular nonionic nitro and quinone dyes and neutral azo dyes. Preferred nonionic substantive dyes are those under the international designations or trade names HC Yellow 2, HC Yellow 4, HC Yellow 5, HC Yellow 6, HC Yellow 12, HC Orange 1, Disperse Orange 3, HC Red 1, HC Red 3, HC Red 10, HC Red 1, HC Red 13, HC Red BN, HC Blue 2, HC Blue 1 1, HC Blue 12, Disperse Blue 3, HC Violet 1, Disperse Violet 1, Disperse Violet 4, Disperse Black 9 known compounds . and 1,4-diamino-2-nitrobenzene, 2-amino-4-nitrophenol, 1,4-bis (2-hydroxyethyl) amino-2-nitrobenzene, 3-nitro-4- (2-hydroxyethyl) -aminophenol, 2- (2-hydroxyethyl) amino-4,6-dinitrophenol, 4 - [(2-hydroxyethyl) amino] -3-nitro-1-methylbenzene, 1-amino-4- (2-hydroxyethyl) amino 5-chloro-2-nitrobenzene, 4-amino-3-nitrophenol, 1- (2'-ureidoethyl) amino-4-nitrobenzene, 2 - [(4-amino-2-nitrophenyl) amino] benzoic acid, 6- Nitro-1,2,3,4-tetrahydroquinoxaline, 2-hydroxy-1,4-naphthoquinone, picramic acid and its salts, 2-amino-6-chloro-4-nitrophenol, 4-ethylamino-3-nitrobenzoic acid and 2-chloro-6-ethylamino-4-nitrophenol.

The agents according to the invention may also contain naturally-analogous dyes in addition to the compound or compounds of the formula (I). Compositions according to the invention which comprise precursors of naturally-analogous dyes are preferably used as air-oxidative colorants. Consequently, in this embodiment said compositions are not added with an additional oxidizing agent.

Derivatives of 5,6-dihydroxyindoline, in particular 5,6-dihydroxyindoline, N-methyl-5,6-dihydroxyindoline, N-ethyl-5,6-dihydroxyindoline, N-propyl-5, are particularly suitable as precursors of naturally-analogous hair dyes , 6-dihydroxyindoline, N-butyl-5,6-dihydroxyindoline and also 5,6-dihydroxy-indoline-2-carboxylic acid, and also derivatives of 5,6-dihydroxyindole, in particular 5,6-dihydroxyindole, N-methyl- 5,6-dihydroxyindole, N-ethyl-5,6-dihydroxyindole, N-propyl-5,6-dihydroxyindole, N-butyl-5,6-dihydroxyindole, 5,6-dihydroxyindole-2-carboxylic acid, and physiologically acceptable salts the above compounds.

The dye precursors of naturally-analogous dyes are each preferably used in an amount of from 0.001 to 5% by weight, based on the total application preparation.

In the case of oxidative dyeings, the development of the color can in principle be done with atmospheric oxygen. Preferably, however, a chemical oxidizing agent is used, especially if, in addition to the coloring, a lightening effect on human hair is desired. This lightening effect may be desired regardless of the staining method. As the oxidizing agent are persulfates, peroxodisulfates, chlorites, hypochlorites and in particular hydrogen peroxide and / or one of its solid addition products of organic or inorganic compounds in question.

In order to prevent a premature, undesired reaction of the oxidation dye precursors by the oxidizing agent, oxidation dye precursors and oxidizing agents themselves are expediently prepared separately from each other and brought into contact only immediately before use.

In a further embodiment of the present invention, therefore, agents are preferred which are characterized in that they are prepared immediately before use by mixing at least two preparations, wherein the at least two preparations are provided in at least two separately prepared containers and wherein a container is a colorant (K1) which contains in a cosmetic carrier at least one oxidation dye precursor (A) according to formula (I), and a further container an oxidizing agent preparation (K2) containing at least one oxidizing agent.

Preferably, products containing the agents according to the invention are accordingly packaged as multicomponent packaging units (kit-of-parts) containing

K1: a first component which is a previously described agent according to the invention and

K2: a second component which is an oxidizer preparation. Shortly before use, K1 and K2 are mixed together to form the ready-to-use colorant.

The agents (K1) and (K2) can be mixed together, for example, in a mixing ratio of 1: 4 to 4: 1. In particular, mixing ratios of 1: 2 to 2: 1 are usual, the mixing ratios in each case referring to the ratio of the amounts by weight of (K1) and (K2) (eg 200 g of the agent (K1) can be mixed with 100 g of the agent (K2). are mixed, resulting in a mixing ratio of 2: 1).

The oxidizing agent preparation (K2) preferably contains as the oxidizing agent hydrogen peroxide and / or one of its solid addition products of organic or inorganic compounds, such as urea, melamine and sodium borate.

The amount of oxidizing agent in the ready-to-use agent is preferably from 0.5 to 12% by weight, preferably from 2 to 10% by weight, more preferably from 3 to 6% by weight (calculated as 100% strength H.sub.2 O.sub.2), based in each case on ready to use means.

Such oxidizer formulations are preferably aqueous, flowable oxidizer formulations. Preferred preparations are characterized in that the flowable oxidizing agent preparation - based on their weight - 40 to 90 wt .-%, preferably 50 to 85 wt .-%, particularly preferably 55 to 80 wt .-%, more preferably 60 to 77, 5 wt .-% and in particular 65 to 75 wt .-% water.

According to the invention, however, the oxidation dye can also be applied to the hair together with a catalyst which activates the oxidation of the dye precursors. Such catalysts are z. For example, certain enzymes, iodides, quinones or metal ions.

Shortly before use, the agent according to the invention (corresponding to the dyeing preparation (K1)) is mixed with an oxidizing agent preparation (K2). In this way, the ready-to-use oxidative colorant is obtained.

For sufficient swelling of the keratin fibers, the ready-to-use oxidative colorant is preferably adjusted to an alkaline pH. The dyeing processes on keratin fibers also usually take place in an alkaline medium. However, in order to preserve the keratin fibers as well as the skin as much as possible, the setting of too high a pH value is not desirable. Therefore, it is preferred that the pH of the ready-to-use agent is from 8.0 to 10.5, more preferably from 8.7 to 10.3, even more preferably from 9.0 to 10.2, and most preferably from 9.2 to 10.1. The indicated pH values are values which were measured at a temperature of 22 ° C with a glass electrode.

The alkalizing agents which can be used according to the invention for adjusting the preferred pH can be selected from the group consisting of ammonia, alkanolamines, basic amino acids and inorganic alkalizing agents such as (earth) alkali metal hydroxides, (earth) alkali metal metasilicates, (earth) Alkali metal phosphates and (earth) alkali metal hydrogen phosphates. Preferred inorganic alkalizing agents are sodium hydroxide, potassium hydroxide, sodium silicate and sodium metasilicate. Organic alkalizing agents which can be used according to the invention are preferably selected from monoethanolamine, 2-amino-2-methylpropanol and triethanolamine. The basic amino acids which can be used as alkalizing agents according to the invention are preferably selected from the group formed from arginine, lysine, ornithine and histidine, more preferably arginine. However, it has been found in the context of the investigations on the present invention that further preferred agents according to the invention are characterized in that they additionally contain an organic alkalizing agent. An embodiment of the first subject of the invention is characterized in that the agent additionally contains at least one alkalizing agent which is selected from the group consisting of ammonia, alkanolamines and basic amino acids, in particular ammonia, monoethanolamine and arginine or its compatible salts. Preferably, the or the alkalizing agents are compounded together with the oxidation dye precursors in the dyeing preparation (K1).

To further increase the lightening, the dyeing preparation (K1) and / or the oxidizing agent preparation (K2) may additionally be added with at least one SiO 2 compound, such as silicic acid or silicates, in particular waterglasses. The SiO 2 compound may in this case be present in the dyeing preparation (K1) and / or in the oxidizing agent preparation (K2). It may be preferred according to the invention, the SiO 2 compounds in amounts of 0.05 wt .-% to 15% by weight, particularly preferably in amounts of 0, 15 wt .-% to 10 wt .-% and most preferably in Amounts of 0.2 wt .-% to 5 wt .-%, in each case based on the total weight of the dyeing preparation (K1) or on the total weight of the oxidizing agent preparation (K2) to use. The amounts given in each case the content of the SiO 2 compounds (without their water content) in the funds again.

The oxidative color-changing agents (i.e., the coloring preparation (K1) and / or the oxidizing agent preparation (K2)) may further contain additional active ingredients, auxiliaries and additives in order to improve the coloring performance and to adjust other desired properties of the agents.

The ready-to-use colorants are preferably provided as a liquid preparation and, if appropriate, an additional surface-active substance is additionally added to the agents, such surface-active substances being used as surfactants or as surfactants, depending on the field of application Emulsifiers are selected: they are preferably selected from anionic, zwitterionic, amphoteric and nonionic surfactants and emulsifiers.

Agents suitable according to the invention are characterized in that the agent additionally contains at least one anionic surfactant. Preferred anionic surfactants are fatty acids, alkyl sulfates, alkyl ether sulfates and ether carboxylic acids having 10 to 20 carbon atoms in the alkyl group and up to 16 glycol ether groups in the molecule.

Agents suitable according to the invention are characterized in that the agent additionally contains at least one zwitterionic surfactant. Preferred zwitterionic surfactants are betaines, N-alkyl-Ν, Ν-dimethylammonium glycinates, N-acyl-aminopropyl-N, N-dimethylammoniumglycinate, and 2-alkyl-3-carboxymethyl-3-hydroxyethyl-imidazoline. A preferred zwitterionic surfactant is known by the INCI name Cocamidopropyl Betaine.

Agents suitable according to the invention are characterized in that the agent additionally contains at least one amphoteric surfactant. Preferred amphoteric surfactants are N-alkylglycines, N-alkyl propionic acids, N-alkylaminobutyric acids, N-alkyliminodipropionic acids, N-hydroxyethyl-N-alkylamidopropylglycines, N-alkyltaurines, N-alkylsarcosines, 2-alkylaminopropionic acids and alkylaminoacetic acids. Particularly preferred amphoteric surfactants are N-cocoalkylaminopropionate, cocoacylaminoethylaminopropionate and C 12 -C 18 -acylsarcosine.

Furthermore, it has proven to be advantageous if the agents contain other, nonionic surfactants. Preferred nonionic surfactants are alkyl polyglycosides and alkylene oxide adducts of fatty alcohols and fatty acids with in each case 2 to 30 moles of ethylene oxide per mole of fatty alcohol or fatty acid. Preparations having excellent properties are also obtained if they contain fatty acid esters of ethoxylated glycerol as nonionic surfactants.

The nonionic, zwitterionic or amphoteric surfactants are used in proportions of from 0.1 to 45% by weight, preferably from 1 to 30% by weight and very particularly preferably from 1 to 15% by weight, based on the total amount of ready-to-use agents.

The ready-to-use color-change agents may also contain at least one thickener. With regard to these thickeners, there are no fundamental restrictions. Both organic and purely inorganic thickening agents can be used. Suitable thickeners are anionic, synthetic polymers, cationic, synthetic polymers, naturally occurring thickeners, such as nonionic guar gums, scleroglucan gums or xanthan gums, gum arabic, ghatti gum, karaya gum, tragacanth gum, carrageenan gum, agar agar, Locust bean gum, pectins, alginates, starch fractions and derivatives such as amylose, amylopectin and dextrins, as well as cellulose derivatives such as methylcellulose, carboxyalkylcelluloses and hydroxyalkylcelluloses, nonionic fully synthetic polymers such as polyvinyl alcohol or polyvinylpyrrolidinone; and inorganic thickening agents, especially phyllosilicates such as bentonite, especially smectites, such as montmorillonite or hectorite.

Furthermore, it has proved to be advantageous if the colorants, in particular if they additionally contain hydrogen peroxide, contain at least one stabilizer or complexing agent. Particularly preferred stabilizers are phenacetin, alkali benzoates (sodium benzoate) and salicylic acid. Furthermore, all complexing agents of the prior art can be used. Preferred complexing agents according to the invention are nitrogen-containing polycarboxylic acids, in particular EDTA and EDDS, and phosphonates, in particular 1-hydroxyethane-1, 1-diphosphonate (HEDP) and / or ethylenediamine tetramethylenephosphonate (EDTMP) and / or diethylenetriaminepentamethylenephosphonate (DTPMP) or their sodium salts.

Furthermore, the agents according to the invention may contain further active ingredients, auxiliaries and additives, for example nonionic polymers such as, for example, vinylpyrrolidinone / vinyl acrylate copolymers, polyvinylpyrrolidinone, vinylpyrrolidinone, vinyl acetate copolymers, polyethylene glycols and polysiloxanes; additional silicones, such as volatile or nonvolatile, straight-chain, branched or cyclic, crosslinked or uncrosslinked polyalkylsiloxanes (such as dimethicones or cyclomethicones), polyarylsiloxanes and / or polyalkylarylsiloxanes, especially polysiloxanes with organofunctional groups, such as substituted or unsubstituted amines (amodimethicones), carboxyl, Alkoxy and / or hydroxyl groups (dimethicone copolyols), linear polysiloxane (A) polyoxyalkylene (B) block copolymers, grafted silicone polymers; cationic polymers such as quaternized cellulose ethers, quaternary group polysiloxanes, dimethyldiallylammonium chloride polymers, acrylamide-dimethyldiallyl-ammonium chloride copolymers, diethyl sulfate-quaternized dimethylaminoethylmethacrylate-vinylpyrrolidinone copolymers, vinylpyrrolidinone-imidazolinium methochloride copolymers, and quaternized polyvinylalcohol; zwitterionic and amphoteric polymers; anionic polymers such as polyacrylic acids or crosslinked polyacrylic acids; Structurants such as glucose, maleic acid and lactic acid, hair conditioning compounds such as phospholipids, for example, lecithin and cephalins; Perfume oils, dimethylisosorbide and cyclodextrins; fiber structure improving agents, in particular mono-, di- and oligosaccharides such as glucose, galactose, fructose, fructose and lactose; Dyes for staining the agent; Anti-dandruff agents such as Piroctone Olamine, Zinc Omadine and Climbazole; Amino acids and oligopeptides; Protein hydrolysates on animal and / or vegetable basis, as well as in the form of their fatty acid condensation products or optionally anionically or cationically modified derivatives; vegetable oils; Sunscreens and UV blockers; Active ingredients such as panthenol, pantothenic acid, pantolactone, allantoin, pyrrolidinonecarboxylic acids and their salts, and bisabolol; Polyphenols, in particular hydroxycinnamic acids, 6,7-dihydroxycoumarins, hydroxybenzoic acids, catechins, tannins, leucoanthocyanidins, anthocyanidins, flavanones, flavones and flavonols; Ceramides or pseudoceramides; Vitamins, provitamins and vitamin precursors; Plant extracts; Fats and waxes such as fatty alcohols, beeswax, montan wax and paraffins; Swelling and penetration substances such as glycerol, propylene glycol monoethyl ether, carbonates, bicarbonates, guanidines, Ureas and primary, secondary and tertiary phosphates; Opacifiers such as latex, styrene / PVP and styrene / acrylamide copolymers; Pearlescing agents such as ethylene glycol mono- and distearate and PEG-3-distearate; Pigments and propellants such as propane-butane mixtures, N2O, dimethyl ether, CO2 and air.

The choice of these other substances will be made by those skilled in the art according to the desired properties of the agents. With regard to further optional components and the amounts of these components used, reference is expressly made to the relevant manuals known to the person skilled in the art. The additional active ingredients and auxiliaries are preferably present in the agents according to the invention in amounts of from 0.0001 to 25% by weight, in particular from 0.0005 to 15% by weight, based in each case on the total weight of the dyeing preparation (K1) and / or the oxidizing agent preparation (K2) used.

The oxidation dye precursors of the formula (I), in particular the abovementioned preferred and particularly preferred compounds, are not known from the literature. A further subject of the present invention are therefore compounds of the formula (I)

Y1, Y2, Y4 independently of one another for a group R5R6N- or for one

Hydroxy group,

X represents an oxygen atom (-O-), a sulfur atom (-S-) or a

Group -NR7- stands,

R 1, R 2, R 3, R 4 independently represent a hydrogen atom, a C 1 -C 6 -alkyl group, a C 2 -C 6 -alkenyl group, a hydroxy-C 2 -C 6 -alkyl group, a polyhydroxy-C 2 -C 6 -alkyl group, a hydroxy group, a C 1 -C6-alkoxy group, an amino group, a group R8R9N-, a cyano group, a Ci-C6-alkoxycarbonyl group, an aryl group or a halogen atom (fluorine, chlorine, bromine or iodine),

R5, R6, R7, R8, R9 independently represent a hydrogen atom, a Ci-C6-alkyl group, a C2-C6-alkenyl group, a hydroxy-C2-C6-alkyl group, a polyhydroxy-C2-C6-alkyl group or an aryl group . with the proviso that when X is an oxygen atom (-O-) and Y1, Y2, Y3 and Y4 are all a group R5R6N-, at least one of the radicals R1, R2, R3 and R4 is hydrogen is different.

With respect to further preferred embodiments of these compounds mutatis mutandis applies to the means of the invention.

Examples

Synthesis Example 1: Synthesis of 2- (2,5-diaminophenoxy) -5-methylbenzene-1,4-diamine, tetrahydrochloride (E1)

To a solution of N- (5-chloro-2-methylphenyl) acetamide (30.0 g, 0.13 mol) in conc. Sulfuric acid (130 ml) was slowly added dropwise at 0 ° C conc. Nitric acid (10.0 ml). After the addition was stirred for 16 h at room temperature. Subsequently, the reaction mixture was poured onto ice and the resulting precipitate was filtered off. The residue was dissolved in ethyl acetate and washed twice with saturated sodium bicarbonate solution and twice with saturated NaCl solution. Subsequently, the organic phase was dried over sodium sulfate and concentrated. This gave N- (5-chloro-2-methyl-4-nitrophenyl) acetamide (20.9 g, 0.07 mol, 54%) as a 20.9 g of light-brown, crystalline substance.

Ή-NMR (300 MHz, DMSO-c / 6): δ = 2.17 (s, 3H, CH ₃ C = 0), 2:32 (s, 3H, 2-C H _3), 7.91 (s, 1 H, 6 -H),

8.12 (s, 1H, 3-H), 9.62 (s, 1H, NH).

1 .2. Synthesis of 5-chloro-2-methyl-4-nitroaniline

A solution of N- (5-chloro-2-methyl-4-nitrophenyl) acetamide (20.0 g, 0.07 mol) in conc. Hydrochloric acid (200 ml) was heated at reflux for 5 h. After cooling the reaction mixture to room temperature, the resulting precipitate was filtered off. The residue was washed neutral with water, recrystallized from toluene and then dried in vacuo. 5-Chloro-2-methyl-4-nitroaniline (8.1 g, 0.04 mol, 62%) was obtained as a light yellow, crystalline substance.

Ή-NMR (300 MHz, DMSO-c / 6): δ = 2:08 (s, 3H, 2-C, _CH3), 6:52 (brs, 2H, NH), 6.70 (s, 1 H, 6-H) , 7.82 (s, 1H, 3-H). ³ C-NMR (126 MHz, DMSO-c / 6): δ = 16.9 (2-CH _3), 1 14.3 (6-C), 120.2 (2-C), 129.3 (3-C), 135.7 (4 - C), 144.5 (1 -C), 153.5 (5-C).

1

A solution of 2-amino-5-nitrophenol (6.6 g, 42.9 mmol) in tetrahydrofuran (100 ml) was added with potassium carbonate (1.8 g, 85.7 mmol, 2.0 eq.) And heated to reflux. At this temperature, a solution of 5-chloro-2-methyl-4-nitroaniline (8.0 g, 42.9 mmol) in tetrahydrofuran (100 ml) was added dropwise and stirring was continued at this temperature for 16 h. Subsequently, the THF was distilled off on a rotary evaporator, the residue was dissolved in water and extracted with ethyl acetate. The combined organic phases were dried over sodium sulfate and concentrated to dryness. The residue was taken up in 80 ml of toluene, heated and filtered hot, the filtrate was allowed to cool to room temperature and the precipitated solid was filtered off. The residue from both filtrations was combined to give 5- (2-amino-5-nitrophenoxy) -2-methyl-4-nitroaniline (7.5 g, 24.6 mmol, 57%) as a light brown, crystalline substance.

H-NMR (300 MHz, DMSO-c / 6): δ = 2.25 (s, 3H, 2-C, CH _3), 6.19 (s, 1 H, 3Ar H), 6:55 (s, 1 H, ArH), 6.67 (s, 1H, ArH), 7.49 (s, 1H, ArH), 7.88 (s, 1H, ArH).

1

A solution of 5- (2-amino-5-nitrophenoxy) -2-methyl-4-nitroaniline in ethanol (400 ml) was treated with 5% palladium on activated carbon catalyst (0.2 g) and added under 1 bar hydrogen atmosphere for 8 h Room temperature hydrogenated. After completion of the reaction, the suspension was poured into 100 ml of hydrochloric acid (6 M) and the catalyst was filtered off. The solution was concentrated to dryness to give 2- (2,5-diaminophenoxy) -5-methylbenz-1,4-diamine hydrochloride (5.8 g, 14.9 mmol, 62%) as light gray crystals.

H-NMR (300 MHz, DMSO-c6): δ = 2.21 (s, 3H, 2-C, CH _3), 6.84 (s, 1 H, ArH), 6.92 (d, 1 H, ArH), 7.27 ( s, 1H, ArH), 7.40 (s, 1H, ArH), 7.53 (d, 1H, ArH).

Synthesis Example 2: Synthesis of 4-amino-3- (2,5-diaminophenoxy) phenol, trihydrochloride (E2)

To a solution of 3-fluoro-4-nitro-phenol (10 g, 63.6 mmol) in 200 ml of dry dichloromethane was added 3,4-dihydropyran (8 g, 95.5 mmol) and a catalytic amount of p-toluenesulfonic acid and added for 8 h Room temperature stirred. Subsequently, a 3% aq. Sodium hydroxide solution was added dropwise and stirred for a further 10 min. The phases were then separated, the organic phase dried over magnesium sulfate and filtered through a little silica gel. The solution was concentrated to dryness to give 2- (3-fluoro-4-nitrophenoxy) oxane (9.6 g, 39.4 mmol, 62%) as a white solid.

To a solution of 2-amino-5-nitro-phenol (7.0 g, 45.6 mmol) in 100 ml of dry dimethylformamide was added under nitrogen anhydrous potassium carbonate (8.6 g, 62.2 mmol) and stirred at room temperature for 30 min. Subsequently, a solution of 2- (3-fluoro-4-nitrophenoxy) oxane (10.0 g, 41.5 mmol) in 20 ml of dry THF was slowly added dropwise and stirred overnight at room temperature. The solution was then filtered through a little diatomaceous earth, the filtrate was concentrated to dryness and the residue was purified by column chromatography (dichloromethane / methanol). 4-Nitro-2- [2-nitro-5- (oxan-2-yloxy) -phenoxy] -aniline (7.3 g, 19.5 mmol, 47%) was obtained as a white solid.

H NMR (300 MHz, DMSO): δ = 1.55-1.89 (m, 6H, CH ₂ ), 3.72-3.45 (m, 2H, CH ₂ ), 5.58 (dd, 1H, CH), 6.59 (s, 1 H, ArH), 6.79 (s, 2H, NH ₂ ), 6.87 (d, 1H, ArH), 6.99 (d, 1H, ArH), 7.66 (s, 1H, ArH), 7.94 (d, 1 H, ArH), 8.16 (d, 1H, ArH).

2.3. Synthesis of 3- (2-amino-5-nitrophenoxy) -4-nitrophenol

To a solution of 4-nitro-2- [2-nitro-5- (oxan-2-yloxy) phenoxy] aniline (7.3 g, 19.5 mmol) in 100 ml of methanol was added 1 ml hydrochloric acid (1 M) and stirred for 8 h stirred at room temperature. The solution was then concentrated to dryness, the residue washed with water and then dried in vacuo. 3- (2-Amino-5-nitrophenoxy) -4-nitrophenol (5.7 g, 19.5 mmol, quant.) Was obtained.

Ή NMR (300 MHz, DMSO): δ = 6.48 (d, 1H, ArH), 6.88 (s, 1H, ArH), 7.58 (d, 1H, ArH), 7.77 (d, 2H, ArH), 8.28-7.97 (m, 1H, ArH), 9.89 (s, 1H, ArH), 1.20 (s, 2H, NH ₂ ).

A solution of 3- (2-amino-5-nitrophenoxy) -4-nitrophenol (2.3 g, 8.0 mmol) in ethanol (400 ml) was treated with 5% palladium on charcoal catalyst (0.2 g) and under 1 bar hydrogen atmosphere for Hydrogenated for 26 h at room temperature. After completion of the reaction, the suspension was mixed with 8.4 ml of hydrochloric acid (10%) and the catalyst was filtered off. The solution was concentrated to dryness to give 4-amino-3- (2,5-diaminophenoxy) phenol hydrochloride (2.3 g, 8.0 mmol, quant) as black crystals.

H-NMR (300 MHz, DMSO-c / 6): δ = 6.38 (s, 1H, ArH), 6.45 (d, 1H, ArH), 6.78 (s, 1H, ArH), 7.04 (d, 1H, ArH), 7.30 (d, 1H, ArH).

Synthesis Example 3: Synthesis of 2 - [(2,5-diaminophenyl) sulfanyl] benzene-1,4-diamine, tetrahydrochloride (E3)

3.1. Synthesis of 3 - [(5-amino-2-nitrophenyl) sulfanyl] -4-nitroaniline

To a solution of 2-fluoro-4-nitroaniline (10.0 g, 64.0 mmol) in ethanol (50 ml) was added sodium hydrogensulfide (5.22 g, 70.4 mmol) and stirred at room temperature overnight. The solution was then concentrated to dryness and the residue was suspended in 30% aqueous sodium hydroxide solution. The suspension was filtered and the filtrate acidified with 3 M hydrochloric acid, whereupon 5-amino-2-nitrobenzene-1-thiol precipitated, which was filtered off (7.6 g, 44.6 mmol). This was implemented in the next step without further purification.

To a solution of the 5-amino-2-nitrobenzene-1-thiol in dimethylformamide (30 ml) was added 2-fluoro-4-nitroaniline (6.3 g, 40.3 mmol) and stirred at room temperature overnight. Subsequently, sat. Added potassium carbonate solution and the precipitate filtered off. The precipitate was suspended three times in 500 ml of ethyl acetate, stirred for 1 h, filtered off with suction and then dried in vacuo at 35 ° C. 3 - [(5-Amino-2-nitrophenyl) sulfanyl] -4-nitroaniline (7.56 g, 24.7 mmol, 61%) was obtained as yellow crystals.

Ή-NMR (300 MHz, DMSO-c / 6): δ = 6.33 (s, 1H, ArH), 6.49 (d, 1H, ArH), 6.58 (d, 1H, ArH), 6.70 (s, 2H, NH), 6.78 (s, 2H, NH), 7.02 (s, 1H, ArH), 8.09 (dd, 2H, ArH).

3C-NMR (126 MHz, DMSO-c / 6): δ = 1 12.9 (2 x ArCH), 1 15.9 (2 x ArCH), 129.4 (2 x ArCH), 135.3 (2 x ArC), 135.8 (2 x ArC), 155.0 (2 x ArC).

3.2. Synthesis of 2 - [(2,5-diaminophenyl) sulfanyl] benzene-1,4-diamine tetrahydrochloride (E3)

To a solution of 3 - [(5-amino-2-nitrophenyl) sulfanyl] -4-nitroaniline (7.56 g, 24.7 mmol) in 500 ml of ethanol was added 0.2 g of catalyst (5% Pd / C) and the mixture autoclaved at 3 bar hydrogen pressure at room temperature stirred overnight. Then, the solution was poured into 250 ml of hydrochloric acid solution (6 M) and the catalyst was filtered off. The filtrate was concentrated to dryness. This gave 2 - [(2,5-diaminophenyl) sulfanyl] benzene-1,4-diamine tetrahydrochloride (9.45 g, 24.2 mmol, 98%) (E3) as light brown crystals. H-NMR (300 MHz, DMSO-c / 6): δ = 7.09 - 7.22 (m, 6H, ArH).

3C-NMR (126 MHz, DMSO-c / 6): δ = 1 19.2 (2 x ArCH), 1 19.7 (2 x ArC), 124.3 (2 x ArCH), 125.1 (2 x ArC), 127.1 (2 x ArCH), 142.8 (2 x ArC).

Synthesis Example 4: Synthesis of 4-amino-3 - [(2,5-diaminophenyl) sulfanyl] phenol

Trihydrochloride (E4)

To a solution of 3-fluoro-4-nitrophenol (10.0 g, 63.5 mmol) in dimethylformamide (30 ml) was added benzyl bromide (10.9 g, 63.5 mmol) and potassium carbonate (9.65 g, 69.8 mmol) and stirred at room temperature overnight. The solution was then treated with saturated potassium carbonate solution and extracted with dichloromethane. The combined organic Pahsen were dried over sodium sulfate and concentrated. 4- (Benzyloxy) -2-fluoro-1-nitrobenzene (6.12 g, 24.3 mmol) was obtained, which was reacted further without further purification.

To a solution of 4- (benzyloxy) -2-fluoro-1-nitrobenzene in dimethylformamide (30 ml) was added 5-amino-2-nitrobenzene-1-thiol (3.71 g, 22.1 mmol) and stirred at room temperature overnight. Subsequently, sat. Added potassium carbonate solution and the precipitate filtered off. The solid was dissolved in 500 ml of boiling toluene and an insoluble residue was filtered hot. The solution was concentrated to 250 ml and allowed to stand overnight to give a precipitate. This was filtered off and dried at 50 ° C in a vacuum. 3 - {[5- (Benzyloxy) -2-nitrophenyl] sulfanyl} -4-nitroaniline (6.59 g, 16.6 mmol, 75%) was obtained as a yellow solid. H-NMR (300 MHz, DMSO-c6): δ = 5.18 (s, 2H, CH _2), 6:33 (s, 1 H, ArH), 6.72 (dd, 1 H, ArH), 7:09 (s, 2H, NH), 7.27 (dd, 1H, ArH), 7.31-743 (m, 5H, ArH), 8.08 (d, 1H, ArH), 8.35 (d, 1H, ArH).

3C-NMR (126 MHz, DMSO-c / 6): δ = 70.7 (CH ₂ ), 1 12.7 (ArCH), 1 14.6 (ArCH), 1 16.0 (ArCH), 120.2 (ArCH), 125.7 (2 x ArCH ), 128.2 (ArCH), 128.5 (ArCH), 128.9 (2 x ArCH), 129.4 (ArCH), 133.0 (ArC), 135.0 (ArC), 135.9 (ArC), 136.0 (ArC), 143.0 (ArC), 155.2 (ArC), 162.4 (ArC).

4.2. Synthesis of 4-amino-3 - [(2,5-diaminophenyl) sulfanyl] phenol, trihydrochloride (E4)

To a solution of - {[5- (benzyloxy) -2-nitrophenyl] sulfanyl} -4-nitroaniline (8.92 g, 22.4 mmol) in 400 ml of ethanol was added 1 .5 g of catalyst (5% Pd / C) and the Mixture in an autoclave at 3 bar hydrogen pressure at room temperature stirred overnight. Subsequently, the solution was poured into 35 ml hydrochloric acid solution (10% strength) and the catalyst was filtered off. The filtrate was concentrated to dryness. 4-Amino-3 - [(2,5-diaminophenyl) sulfanyl] phenol trihydrochloride (6.10 g, 17.0 mmol, 76%) (E4) was obtained as light gray crystals.

Ή-NMR (300 MHz, DMSO-c / 6): δ = 6.56 (d, 1H, ArH), 7.00 (m, 2H, ArH), 7.28 (s, 1H, ArH), 7.49 (s, 1 H, ArH), 7.59 (d, 1H, ArH).

2. colorations

The following color creams were produced:

Hydrenol D ^® 8.5 wt .-%

Lorol® ^® tech. ² 2.0% by weight

Texapon ^® NSO ³ 20.0 wt .-%

Dehyton ^® K ⁴ 12.5 wt .-%

Eumulgin B2 ^® ⁵ 0.75 wt .-%

Sodium sulfite 1, 0% by weight

Ammonium sulfate 1, 0 wt .-%

Developer component 3 mmol

Coupler component 3 mmol

Water ad 100

Ci6-i8 fatty alcohol (INCI name: Cetearyl alcohol) (Cognis)

² Ci2-i8 fatty alcohol (INCI name: Coconut alcohol) (Cognis)

³ lauryl ether sulfate, sodium salt (about 27.5% active ingredient, INCI name: Sodium Laureth Sulfate) (Cognis)

⁴ N, N-dimethyl-N- (C8-i8-cocoamidopropyl) ammonium acetobetaine (about 30% active;

INCI name: Aqua (Water), Cocamidopropyl Betaine) (Cognis)

⁵ cetylstearyl alcohol with approx. 20 EO units (INCI name: Ceteareth-20) (Cognis)

Hydrenol D and Lorol techn. were melted together with Texapon NSO, Dehyton K and Eumulgin B2 at 80 ° C. Then, the melt was emulsified with the sodium sulfite dissolved in a part of the water and ammonium sulfate. The developer according to the invention was in a dissolved further part of the indicated amount of water with heating and added with stirring. The coupler was also dissolved in a portion of the indicated amount of water and added with stirring. Then the formulation was made up to 100% with water and stirred cold.

The dyeing cream thus obtained was mixed in a ratio of 1: 1 with the following developer dispersion having a hydrogen peroxide content of 6%.

Dipicolinic acid 0.1% by weight

Sodium pyrophosphate 0.03% by weight

Turpinal SL ^® ⁶ 1, 50 wt .-%

Texapon ^® N28 ⁷ 2.00 wt .-%

Acrysol ^® 22 ⁸ 0.60 wt .-%

Hydrogen peroxide, 50% 6.00% by weight

Sodium hydroxide, 45% 0.80% by weight

Water ad 100% by weight

⁶ 1-Hydroxyethane-1, 1-diphosphonic acid (about 58 - 61% active ingredient content, INCI name: Etidronic Acid, Aqua (Water)) (Solutia)

⁷ lauryl ether sulfate sodium salt (at least 26.5% active substance content; INCI name:

Sodium Laureth Sulfate) (Cognis)

⁸ acrylic polymer (about 29.5 - 30.5% solids in water, INCI name:

Acrylates / steareth-20 methacrylate copolymer)

For the dyeing process, 4 times the amount of ready-to-use mixture was applied to one strand of 80% gray hair (Kerling). After a contact time of 30 minutes at 32 ° C, the locks were rinsed and washed out with a conventional shampoo. The streaking of the streaks was visually assessed under the daylight lamp after drying. The staining results are summarized in the following tables.

E1: colorations with 2- (2,5-diaminophenoxy) -5-methylbenz-1,4-diamine tetrahydrochloride

Self-reaction (3 mmol developer, without coupler) Nuance / color intensity

E1 eyebrow ++ +++ high intensity ++ medium intensity + low intensity

E2: colorations with 4-amino-3- (2,5-diaminophenoxy) phenol trihydrochloride

Developer coupler Nuance / color intensity

E2 resorcinol havanna brown +++

E2 3-amino-2-methylamino-6-methoxypyridine olive brown +++

E2 5-amino-2-methylphenol hair brown ++

E2 2-amino-3-hydroxypyridine sepia +

E2 1,3-bis (2,4-diaminophenoxy) propane Russet brown +++

E2 2-Methylresorcin bronze brown ++

Self-reaction (3 mmol developer, without coupler) Nuance / color intensity

E2 bronze brown ++

E3: colorations with 2 - [(2,5-diaminophenyl) sulfanyl] benzene-1,4-diamine tetrahydrochloride

Developer coupler Nuance / color intensity

E3 resorcinol lapis blue +++

E3 3-amino-2-methylamino-6-methoxypyridine dark green +++

E3 5-amino-2-methylphenol dark blue +++

E3 2-Amino-3-hydroxyphenyl chloride blue +++

E3 1,3-bis (2,4-diaminophenoxy) propane black-blue +++

E3 2-Methylresorcin gray-blue +++

Self-reaction (3 mmol developer, without coupler) Nuance / color intensity

E3 deep blue +++

E4: colorations with 4-amino-3 - [(2,5-diaminophenyl) sulfanyl] phenol trihydrochloride

Developer coupler Nuance / color intensity

E4 resorcinol gray tubin +++

E4 3-amino-2-methylamino-6-methoxypyridine olive +++

E4 5-amino-2-methylphenol brown-gray ++

E4 2-amino-3-hydroxypyridine brown-gray +

E4 1, 3-bis (2,4-diaminophenoxy) propane violet-gray ++

E4 2-methylresorcinol brown-gray ++

Self-reaction (3 mmol developer, without coupler) Nuance / color intensity

E4 gray agent +++

Claims

claims

1. An agent for the oxidative color change of keratinic fibers, in particular human hair, contained in a cosmetic carrier

Y1, Y2, Y4 independently of one another for a group R5R6N- or for one

Hydroxy group,

Y 3 represents a halogen atom (fluorine, chlorine, bromine or iodine), a cyano group, a group R 5 R 6 N- or represents a hydroxy group,

X represents an oxygen atom (-O-), a sulfur atom (-S-) or a

Group -NR7- stands,

with the proviso that when X is an oxygen atom (-O-) and Y1, Y2, Y3 and Y4 are all a group R5R6N-, at least one of the radicals R1, R2, R3 and

R4 is different from hydrogen.

2. Composition according to claim 1, characterized in that it contains at least one oxidation dye precursor of the formula (I), in which R1 and R2 independently of one another represent hydrogen or a C 1 -C 6 -alkyl group.

3. Composition according to one of claims 1 to 2, characterized in that it contains at least one oxidation dye precursor of formula (I), in which R3 and R4 independently of one another represent hydrogen or a Ci-C6-alkyl group.

4. Composition according to one of claims 1 to 3, characterized in that it contains at least one oxidation dye precursor of formula (I), in which X represents an oxygen atom (-0-) or a sulfur atom (-S-).

5. Composition according to one of claims 1 to 4, characterized in that it contains at least one oxidation dye precursor of formula (I), in which Y1 is an amino group and / or Y3 is an amino group.

6. Composition according to one of claims 1 to 5, characterized in that it contains at least one oxidation dye precursor of formula (I), in the

- Y2 is a hydroxy group and Y4 is an amino group or

- Y2 is an amino group and Y4 is a hydroxy group.

7. Composition according to one of claims 1 to 6, characterized in that it contains at least one oxidation dye precursor of the formula (I), in which R1 and R2 are both a hydrogen atom, one of the radicals of R3 and R4 is a hydrogen atom and the other of R3 and R4 is methyl.

8. Composition according to one of claims 1 to 7, characterized in that it contains at least one oxidation dye precursor of formula (I), which is selected from

4-Amino-2 - [(2,5-diaminophenyl) amino] benzonitrile

4-amino-2 - benzonitrile [(2-amino-5-hydroxyphenyl) amino]

4-amino-2 - benzonitrile [(5-amino-2-hydroxyphenyl) amino]

2 - [(2,5-diamino-phenyl) amino] -4-hydroxybenzonitrile

4-amino-2- (2,5-diaminophenoxy) benzonitrile

2- (2,5-diaminophenoxy) -4-hydroxybenzonitrile

2- (2-amino-5-hydroxyphenoxy) -4-hydroxybenzonitrile

2- (5-amino-2-hydroxyphenoxy) -4-hydroxybenzonitrile

4-Amino-2 - [(2,5-diaminophenyl) sulfanyl] benzonitrile

4-amino-2 - benzonitrile [(2-amino-5-hydroxyphenyl) sulfanyl]

4-amino-2 - [(5-amino-2-hydroxyphenyl) sulfanyl] benzonitrile

2 - [(2,5-diaminophenyl) sulfanyl] -4-hydroxybenzonitrile

2 - [(2-amino-5-hydroxyphenyl) sulfanyl] -4-hydroxybenzonitrile 2 - [(5-amino-2-hydroxyphenyl) sulfanyl] -4-hydroxybenzonitrile

2-N- (5-amino-2-chlorophenyl) benzyl-1,2,4-triamine

4-amino-3 - [(5-amino-2-chlorophenyl) anriino] phenol

4-Amino-2 - [(5-amino-2-chlorophenyl) anriino] phenol

4-Chloro-3 - [(2,5-diaminophenyl) amino] phenol

2- (5-amino-2-chlorophenoxy) benzene-1,4-diamine

4-Chloro-3- (2,5-diaminophenoxy) phenol

4-Amino-3- (2-chloro-5-hydroxyphenoxy) phenol

4-amino-2- (2-chloro-5-hydroxyphenoxy) phenol

4-Amino-2 - [(2,5-diaminophenyl) anriino] benzonitrile

4-amino-2 - benzonitrile [(2-amino-5-hydroxyphenyl) anriino]

4-amino-2 - benzonitrile [(5-amino-2-hydroxyphenyl) anriino]

2 - [(2,5-diamino-phenyl) amino] -4-hydroxybenzonitrile

4-amino-2- (2,5-diaminophenoxy) benzonitrile

2- (2,5-diaminophenoxy) -4-hydroxybenzonitrile

2- (2-amino-5-hydroxyphenoxy) -4-hydroxybenzonitrile

2- (5-amino-2-hydroxyphenoxy) -4-hydroxybenzonitrile

4-Amino-2 - [(2,5-diaminophenyl) sulfanyl] benzonitrile

4-amino-2 - benzonitrile [(2-amino-5-hydroxyphenyl) sulfanyl]

4-amino-2 - benzonitrile [(5-amino-2-hydroxyphenyl) sulfanyl]

2 - [(2,5-diaminophenyl) sulfanyl] -4-hydroxybenzonitrile

2 - [(2-amino-5-hydroxyphenyl) sulfanyl] -4-hydroxybenzonitrile

2 - [(5-amino-2-hydroxyphenyl) sulfanyl] -4-hydroxybenzonitrile

2-N- (5-amino-2-chlorophenyl) benzyl-1,2,4-triamine

4-amino-3 - [(5-amino-2-chlorophenyl) anriino] phenol

4-Amino-2 - [(5-amino-2-chlorophenyl) anriino] phenol

4-Chloro-3 - [(2,5-diaminophenyl) amino] phenol

2- (5-amino-2-chlorophenoxy) benzene-1,4-diamine

-Chloro-3- (2,5-diaminophenoxy) phenol

4-Amino-3- (2-chloro-5-hydroxyphenoxy) phenol

4-amino-2- (2-chloro-5-hydroxyphenoxy) phenol

2 - [(5-amino-2-chlorophenyl) sulfanyl] benzene-1,4-diamine

4-amino-3 - [(5-amino-2-chlorophenyl) sulfanyl] phenol

4-Amino-2 - [(5-amino-2-chlorophenyl) sulfanyl] phenol

4-Chloro-3 - [(2,5-diaminophenyl) sulfanyl] phenol

4-amino-3 - [(2-chloro-5-hydroxyphenyl) sulfanyl] phenol

4-Amino-2 - [(2-chloro-5-hydroxyphenyl) sulfanyl] phenol -N- (2,5-diaminophenyl) benzene-1,2,4-triamine

-Amino-2 - phenol [(2,5-diaminophenyl) anriino]

-Amino-3 - [(2,5-diaminophenyl) anriino] phenol

-Amino-3 - phenol [(5-amino-2-hydroxyphenyl) anriino]

-Amino-2 - phenol [(5-amino-2-hydroxyphenyl) anriino]

-Amino-3 - phenol [(2-amino-5-hydroxyphenyl) anriino]

Amino-2- (2,5-diaminophenoxy) phenol

-Amino-3- (2,5-diaminophenoxy) phenol

Amino-2- (2-amino-5-hydroxyphenoxy) phenol

Amino-2- (5-amino-2-hydroxyphenoxy) phenol

-Amino-3- (2-amino-5-hydroxyphenoxy) phenol

- [(2,5-diaminophenyl) sulfanyl] benzene-1,4-diamine

-Amino-2 - phenol [(2,5-diaminophenyl) sulfanyl]

-Amino-3 - [(2,5-diaminophenyl) sulfanyl] phenol

-Amino-2 - phenol [(5-amino-2-hydroxyphenyl) sulfanyl]

-Amino-3 - phenol [(2-amino-5-hydroxyphenyl) sulfanyl]

-Amino-3 - phenol [(5-amino-2-hydroxyphenyl) sulfanyl]

N- (2,5-diaminophenyl) -5-methylbenzene-1,2,4-trianhydrin

Amino-2 - [(2,5-diamino-4-nriethylphenyl) anriino] phenol-Amino-3 - [(2,5-diamino-4-nriethylphenyl) anriino] phenol-Amino-5 - [(5-amino -2-hydroxyphenyl) anriino] -2-nriethylphenol-amino-2 - [(5-amino-2-hydroxyphenyl) anriino] -5-nriethylphenol-amino-3 - [(2-amino-5-hydroxyphenyl) amino] - 2-nriethylphenol- (2,5-diaminophenoxy) -5-methylbenzene-1,4-dianirine

Amino-2- (2,5-diamino-4-nriethylphenoxy) phenol

-Amino-3- (2,5-diamino-4-nriethylphenoxy) phenol

-Amino-5- (5-amino-2-hydroxyphenoxy) -2-nriethylphenol-amino-2- (5-amino-2-hydroxyphenoxy) -5-nriethylphenol-amino-5- (2-amino-5-hydroxyphenoxy) -2-nriethylphenol - [(2,5-diaminophenyl) sulfanyl] -5-methylbenzene-1,4-dianionine-amino-2 - [(2,5-diamino-4-niethylphenyl) sulfanyl] phenol-amino-3-ol [(2,5-diamino-4-nriethylphenyl) sulfanyl] phenol-amino-2 - [(5-amino-2-hydroxyphenyl) sulfanyl] -5-nriethylphenol-amino-3 - [(2-amino-5-hydroxyphenyl ) sulfanyl] -6-nriethylphenol-amino-2 - [(2-amino-5-hydroxyphenyl) sulfanyl] -5-methylphenol-N- (2,5-diamino-4-methylphenyl) -5-methylbenzene-1,2 , 4-triamine-amino-2 - [(2,5-diamino-4-methylphenyl) amino] -5-methylphenol 4-amino-3 - [(2,5-diamino-4-methylphenyl) amino] -6-methylphenol

4-amino-5 - [(5-amino-2-hydroxy-4-methylphenyl) amino] -2-methylphenol

4-Amino-2 - [(5-amino-2-hydroxy-4-methylphenyl) amino] -5-methylphenol

4-amino-3 - [(2-amino-5-hydroxy-4-methylphenyl) amino] -6-methylphenol

2- (2,5-diamino-4-methylphenoxy) -5-n-triethylbenzene-1,4-diamine

4-amino-2- (2,5-diamino-4-methylphenoxy) -5-methylphenol

4-amino-3- (2,5-diamino-4-methylphenoxy) -6-methylphenol

4-amino-5- (5-amino-2-hydroxy-4-methylphenoxy) -2-methylphenol

4-amino-2- (5-amino-2-hydroxy-4-methylphenoxy) -5-methylphenol

4-amino-5- (2-amino-5-hydroxy-4-methylphenoxy) -2-methylphenol

2 - [(2,5-diamino-4-methylphenyl) sulfanyl] -5-methylbenzene-1,4-diamine

4-Amino-2 - [(2,5-diamino-4-methylphenyl) sulfanyl] -5-methylphenol

4-amino-3 - [(2,5-diamino-4-methylphenyl) sulfanyl] -6-methylphenol

4-Amino-2 - [(5-amino-2-hydroxy-4-methylphenyl) sulfanyl] -5-methylphenol

4-Amino-2 - [(2-amino-5-hydroxy-4-methylphenyl) sulfanyl] -5-methylphenol

9. Composition according to one of claims 1 to 8, characterized in that it comprises (A) one or more oxidation dye precursors of the formula (I) in a total amount of 0.001 to 5.0% by weight, preferably from 0.1 to 4, 5 wt .-%, more preferably from 0.2 to 4.0 wt .-% and particularly preferably from 0.3 to 3.5 wt .-% - based on the total weight of the composition - contains.

10. Composition according to one of claims 1 to 9, characterized in that it additionally

(B) one or more oxidation dye precursors from the group formed from p-phenylenediamine, p-toluenediamine, 2- (2-hydroxyethyl) -p-phenylenediamine, N, N-bis (2-hydroxyethyl) -p- phenylenediamine, 2-methoxymethyl-p-phenylenediamine, N- (4-amino-3-methylphenyl) -N- [3- (1H-imidazol-1-yl) propyl] amine, bis (2-hydroxy-5- aminophenyl) methane, 4-aminophenol, 4-amino-3-methylphenol, 4,5-diamino-1- (2-hydroxyethyl) pyrazole, 2,4,5,6-tetra-aminopyrimidine, 4-hydroxy-2,5 , 6-triaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine and / or their physiologically acceptable salts.

1 1. A composition according to claim 10, characterized in that it contains one or more oxidation dye precursors from group (B) in a total amount of 0.001 to 3.0 wt .-%, preferably from 0.025 to 1, 5 wt .-%, further preferably from 0.05 to 1, 0 wt .-% and particularly preferably from 0, 1 to 0.5 wt .-% - based on the total weight of the composition - contains.

12. Composition according to one of claims 10 or 11, characterized in that the weight ratio of all the oxidation dye precursors (A) of the formula (I) present in the medium to all the oxidation dye precursors from the group (B), i. the weight ratio (A) / (B), at a value of at least 1, 0, preferably at a value of at least 1, 1, more preferably at a value of at least 1, 2 and particularly preferably at a value of at least 1.3 lies.

13. Composition according to one of claims 1 to 12, characterized in that it additionally

(C) a oleochemical contains a plurality of oxidation dye precursors from the group formed from 3-aminophenol, 5-amino-2-methylphenol, 3-amino-2-chloro-6-methylphenol, 2-hydroxy-4-aminophenoxyethanol, 5 Amino-4-chloro-2-methylphenol, 5- (2-hydroxyethyl) amino-2-methylphenol, 2,4-dichloro-3-aminophenol, 2-aminophenol, 3-phenylenediamine, 2- (2,4-diaminophenoxy ) ethanol, 1, 3-bis (2,4-diaminophenoxy) propane, 1-methoxy-2-amino-4- (2-hydroxyethylamino) benzene, 1, 3-bis (2,4-diaminophenyl) propane, 2, 6-Bis (2'-hydroxyethylamino) -1-methylbenzene, 2 - ({3 - [(2-hydroxyethyl) amino] -4-methoxy-5-methylphenyl} amino) ethanol, 2- ({3 - [(2 -Hydroxyethyl) amino] -2-methoxy-5-methylphenyl} amino) ethanol, 2- ({3 - [(2-hydroxyethyl) amino] -4,5-dimethylphenyl} amino) ethanol, 2- [3-morpholine 4-ylphenyl) amino] ethanol, 3-amino-4- (2-methoxyethoxy) -5-methylphenylamine, 1-amino-3-bis (2-hydroxyethyl) aminobenzene, resorcinol, 2-methylresorcinol, 4-chlororesorcinol , 1, 2,4-trihydroxybenzene, 2-amino-3-hydroxypyridine, 3-amino-2-methylam ino-6-methoxypyridine, 2,6-dihydroxy-3,4-dimethylpyridine, 3,5-diamino-2,6-dimethoxypyridine, 1-phenyl-3-methylpyrazol-5-one, 1-naphthol, 1, 5 Dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 1-dihydroxynaphthalene, 1,8-dihydroxynaphthalene, 4-hydroxyindole, 6-hydroxyindole, 7-hydroxyindole, 4-hydroxyindoline, 6-hydroxyindoline, 7-hydroxyindoline and / or their physiologically tolerable Salt.

14. Composition according to claim 13, characterized in that it contains one or more oxidation dye precursors from the group (C) in a total amount of 0.001 to 5.0 wt .-%, preferably from 0.025 to 4.5 wt .-%, more preferably from 0.05 to 4.0 wt .-% and particularly preferably from 0, 1 to 3.5 wt .-% - based on the total weight of the composition - contains.

15. Compound of formula (I)

Υ1, Υ2, Υ4 independently of one another for a group R5R6N- or for one

Hydroxy group,

X represents an oxygen atom (-O-), a sulfur atom (-S-) or a

Group -NR7- stands,

R 1, R 2, R 3, R 4 independently represent a hydrogen atom, a C 1 -C 6 -alkyl group, a C 2 -C 6 -alkenyl group, a hydroxy-C 2 -C 6 -alkyl group, a polyhydroxy-C 2 -C 6 -alkyl group, a hydroxy group, a C 1 -C 6 alkoxy group, an amino group, a group R 8 R 9 N-, a cyano group, a C 1 -C 6 alkoxycarbonyl group, an aryl group or a halogen atom (fluorine, chlorine, bromine or iodine),

R5, R6, R7, R8, R9 independently of one another represent a hydrogen atom, a C 1 -C 6 -alkyl group, a C 2 -C 6 -alkenyl group, a hydroxy-C 2 -C 6 -alkyl group, a polyhydroxy-C 2 -C 6 -alkyl group or an aryl group .

with the proviso that when X is an oxygen atom (-O-) and Y1, Y2, Y3 and Y4 are all a group R5R6N-, at least one of R1, R2, R3 or R4 of

Hydrogen is different.