2-ACYLAMINO OR 2-SULFONYLAMINO-l , 3-THIAZOLES AS COUPLERS FOR THE OXIDATION DYEING OF KERATIN FIBRES
The invention relates to novel thiazole derivatives that are useful as couplers for the 5 oxidation dyeing of keratin fibres . It is known practice to dye keratin fibres, and in particular human hair, with dye compositions containing oxidation dye precursors, in particular ortho- or para-phenylenediamines, ortho- or para- 10 a inophenols, heterocyclic compounds such as diaminopyrazole derivatives, pyrazolo [1, 5-a]pyrimidine derivatives , pyrimidine derivatives, pyridine derivatives, 5 , 6-dihydroxyindole derivatives and 5,6- dihydroxyindoline derivatives, which are generally 15 known as oxidation bases. Oxidation dye precursors, or oxidation bases, are colourless or weakly coloured compounds that, when combined with oxidizing products, can give rise to coloured compounds or dyes by a process of oxidative condensation. 20 It is also known that the shades obtained with these oxidation bases may be varied by combining them with couplers or coloration modifiers, the latter being chosen especially from meta-phenylenediamines, meta-aminophenols, meta-hydroxyphenols and certain 25 heterocyclic compounds such as, for example, pyrazolo- [1, 5-b] -1,2, 4-triazole derivatives, pyrazolo [3 , 2-c] - 1, 2, 4-triazole derivatives, pyrazolo [1, 5-a]pyrimidine
derivatives, pyridine derivatives, pyrazol-5-one derivatives, indoline derivatives and indole derivatives . The variety of molecules used as oxidation bases and couplers allows a wide range of colours to be obtained. The "permanent" coloration obtained with these oxidation dyes must moreover satisfy a certain number of requirements. Thus, it must have no toxicological drawbacks, it must allow shades to be obtained in the desired intensity,_ and it must show good resistance to external agents such as light, bad weather, washing, permanent-waving, perspiration and rubbing. The dyes must also allow white hairs to be covered and, finally, they must be as unselective as possible, i.e. they must produce the smallest possible colour differences along the same length of keratin fibre, which may in fact be differently sensitized (i.e. damaged) between its end and its root. They must also show good chemical stability in the formulations, and must have a good toxicological profile. The aim of the present invention is to provide novel couplers for obtaining an even wider range of shades and also dye compositions that produce powerful, uniform dyeing results between the root and the end of the hairs, which have good chromaticity, are
sparingly selective and are particularly fast, while at the same time being capable of generating strong colorations in varied shades, in particular in the fundamental shades . This aim is achieved with the present invention, one subject of which is a thiazole derivative of formula (I) below, and the addition salts thereof with an acid or a base :
in which:
• Ri and R2, which may be identical or different, represent : - a hydrogen atom; - a phenyl radical optionally substituted with one or more radicals chosen from halogens, hydroxyl, C1-C4 alkoxy, carboxyl, mono- or di (C1-C4) alkyl- carboxamido (AlkHCO- or (Alk)2NCO), C1-C4 thio- ether, (C1-C4) alkylsulphonyl (-S02alkyl) , sulphonic (-S03H) , alkyl sulphoxide (-SO-alkyl) , alkyl- sulphonamido ( (C1-C4) alkylS02NH-) and NRι3Rι radicals, or a C1-C4 alkyl radical optionally substituted with one or more hydroxyl, C1-C4 alkoxy, carboxyl, mono- or di (Cι-C4)alkyl- carboxamido, '(C1-C4) alkylsulphonyl, sulphonic,
alkyl sulphoxide, alkylsulphonamido or NRι3Ri4;
- a linear or branched Ci-Cβ alkyl radical optionally substituted with one or more hydroxyl, C1-C2 alkoxy, carboxyl, mono- or di (C1-C4) alkyl- carboxamido, (C1-C4) alkylsulphonyl, sulphonic, alkyl sulphoxide, alkylsulphonamido or NRι3Rι4 radicals,
- Ri and R2 may form, with the nitrogen atom to which they are attached, a 5- to 8-membered heterocycle, one or more carbon atoms of the carbon-based ring of which may be replaced with an oxygen, nitrogen or sulphur atom or with an S02 group, the carbon atoms of the ring possibly being substituted with a radical R4 and the ring not comprising a peroxide bond or diazo or nitroso radicals;
- R4 represents : - a halogen atom; - a C1-C4 alkyl radical optionally substituted with one or more hydroxyl, carboxyl, C1-C4 alkoxycarbonyl, C1-C4 alkoxy or NR5R6 radicals; - a carboxyl radical; - a mono- or di (C1-C4) alkylcarboxamido radical; - a (Cι-C4)alkylsulphonyl radical; - an alkylsulphonamido radical; - a hydroxyl radical;
- a C1-C4 alkoxy radical; - a C2-C4 hydroxyalkoxy radical; - an aminosulphonyl radical; - a C1-C4 thioether radical; - a (C1-C4) alkyl sulphoxide radical; - a (C1-C4) alkylsulphonyl radical; - a radical NR7R8;
• R3 represents a radical R9S02 H- or a radical Ri0C(O)NH- with R9 and Rio, which may be identical or different, representing: - a phenyl radical or a 5- or 6-membered aromatic heterocycle, these radicals optionally being substituted with one or more radicals chosen from halogens, hydroxyl, C1-C4 alkoxy, carboxyl, C1-C4 alkoxycarbonyl, mono- or di (C1-C4) alkylcarboxamido, (Cι-C4)alkylsulphonyl, sulphonic, (C1-C4) alkyl sulphoxide, C1-C4 thioether, alkylsulphonamido or NR11R12 radicals, or a C1-C4 alkyl radical optionally substituted with one or more hydroxyl, C1-C4 alkoxy, carboxyl, mono- or di (C1-C4) alkylcarboxamido, (C1-C4) alkylsulphonyl, sulphonic, alkyl sulphoxide, alkylsulphonamido or NR13R14, - a linear or branched Ci-Cs alkyl radical optionally substituted with one or more hydroxyl, OR15, carboxyl, C1-C4 alkoxycarbonyl, mono- or di (C1-C4) alkylcarboxamido, (C1-C4) alkylsulphonyl, sulphonic, (C1-C4) alkyl sulphoxide, alkyl-
sulphona ido or NRι6 i7 radicals; with R15 representing a C1-C4 alkyl radical optionally substituted with one or more radicals chosen from hydroxyl, Cι-C2 alkoxy, amino, (di) (C1-C4) alkylamino and (poly)hydroxy (C2-C4) - alkylamino radicals;
- R5, Re , R, Re, ii R12, Ri3 Ri4/ Ri6 and Ri7, which may be identical or different, represent a hydrogen atom, a
(Cι-C )alkylsulphonyl or (C1-C4) alkyl-CO radical, a mono- or di (C1-C4) alkylcarboxamido radical, or a C3.-C4 alkyl radical optionally substituted with one or more hydroxyl, C1-C4 alkoxy, (C1-C4) alkylsulphonyl, (C1-C4)- alkylsulphonamido, carboxyl, mono- or (di) (C1-C4) alkylcarboxamido, (C1-C4) alkyl sulphoxide, amino, (di)(Cχ-C4)- alkylamino or (poly)hydroxy (C2-C ) alkylamino;
- R7 and R8 may also form, with the nitrogen atom that bears them, a 5- to 8-membered ring optionally substituted with one or more radicals chosen from halogens and hydroxyl, Cι-C2 alkoxy, carboxyl, alkyl- sulphonamido and NR13R14 radicals, or a C1-C4 alkyl radical optionally substituted with one or more hydroxyl, C1-C4 alkoxy, carboxyl, mono- or di(Cι-C4)- alkylcarboxamido or NR13R14; X represents a hydrogen atom; a halogen atom (such as fluorine, chlorine or bromine) ; a C1-C4 alkoxy radical; a phenoxy radical optionally substituted with one or more radicals chosen from halogens and hydroxyl, C1-C4
alkoxy, carboxyl, C1-C4 alkoxycarbonyl, mono- or di (C1-C4) alkylcarboxamido, (C1-C4) alkylsulphonyl, sulphonic, alkyl sulphoxide, C1-C4 thioether, alkyl- sulphonamido, NR13R1 and C1-C4 alkyl radicals; a C1-C4 thioether radical optionally substituted with a hydroxyl, Cχ-C2 alkoxy, carboxyl, sulphonic or amino radical, with the exception of the derivatives
A subject of the present invention is also a dye composition comprising, in a medium that is suitable for dyeing,
- at least one oxidation base, and
- as coupler, at least one thiazole derivative of formula (I) as defined above. A subject of the invention is also dyeing processes using this composition. Another subject of the invention is the use of the derivatives of formula (I) for the oxidation dyeing of keratin fibres, in particular human keratin fibres such as the hair. Not only are the thiazole derivatives of formula (I) of the invention suitable for use as couplers for the oxidation dyeing of keratin fibres,
but also they produce particularly strong and sparingly selective colorations. Furthermore, they make it possible to obtain dye compositions which produce colorations that show good fastness with respect to the various attacking factors to which the hair may be subjected, such as light, bad weather, washing or perspiration. The oxidation dye compositions in accordance with the invention furthermore make it possible to obtain shades in a very wide range of colours. In the radicals defined above bearing an alkyl group, and unless otherwise indicated, the alkyl radical may be linear or branched and optionally substituted with a hydroxyl, alkoxy or carboxyl. Furthermore, when the molecule contains several radicals of the same name, for example NRι3Ri4, these radicals may be identical or different. Examples that may be mentioned for the radicals Ri and R2 of formula (I) include hydrogen and a methyl, ethyl, (iso)propyl, 2-hydroxyethyl, 1-hydroxy- ethyl, 2-carboxyethyl, 2-aminoethyl, 2- (dimethy1- amino) ethyl, 2- (acylamino) ethyl , 2-methoxyethy1, 1, 2-dihydroxyethyl, l-hydroxy-2-aminoethyl, 2-hydroxy- 1-aminoethyl, acetyl or phenyl radical. According to one particular embodiment, Ri and
R2, which may be identical or different, represent: - a hydrogen atom;
- a phenyl radical optionally substituted with one or more radicals chosen from halogens and hydroxyl, C1-C4 alkoxy, carboxyl, (C1-C4) alkylcarboxamido, (C1-C4) alkylsulphonyl, sulphonic, alkyl sulphoxide, C1-C4 thioether, alkylsulphonamido and NRχ3Ri4 radicals, or a C1-C4 alkyl radical optionally substituted with one or more hydroxyl, C3.-C4 alkoxy, carboxyl, mono- or di(Cι-C4)- alkylcarboxamido, (C1-C4) alkylsulphonyl, sulphonic, alkyl sulphoxide, alkylsulphonamido or NRι3Ri4,- - a linear or branched Ci-Cβ alkyl radical optionally substituted with one or more hydroxyl, Cι-C2 alkoxy, carboxyl, (C1-C4) alkylcarboxamido, (C3.-C4) alkylsulphonyl, sulphonic, alkyl sulphoxide, alkylsulphonamido or Rχ3Ri4 radicals. According to one preferred embodiment, i and
R2, which may be identical or different, represent a hydrogen atom; a phenyl radical; a linear or branched C3.-C4 alkyl radical, optionally substituted with one or more hydroxyl, C1-C2 alkoxy, amino, di (C1-C4) alkylamino, carboxyl, (C3.-C4) alkylcarboxamido, (C1-C4) alkylsulphonamido or N 13R14 radicals in which Ri3 and Rχ4, which may be identical or different, represent a hydrogen atom, (C1-C4) alkyl-CO or a C3.-C2 alkyl radical optionally substituted with a hydroxyl or a C1-C2 alkoxy. Preferably, Ri and R2, which may be identical or different, represent a hydrogen atom or an
optionally substituted alkyl radical, for example methyl, 2-hydroxyethyl, 2-carboxyethyl or 1,2-di- hydroxyethyl , or phenyl. According to another embodiment, Ri and R2 form, with the nitrogen atom to which they are attached, a 5- to 8-membered heterocycle chosen from pyrrolidine, piperidine, homopiperidine, piperazine and homopiperazine, the said rings possibly being substituted with one or more radicals R . As examples of this particular embodiment, Ri and R2 form, together with the nitrogen, atom to which they are attached, a heterocycle chosen from pyrrolidine, 2 , 5-dimethylpyrrolidine, proline, 3- hydroxyproline, 4-hydroxyproline, 2,4- dicarboxypyrrolidine, 3-hydroxy-2- hydroxymethylpyrrolidine, 2-carboxamidopyrrolidine, 3-hydroxy-2-carboxamidopyrrolidine, 2- (diethyl- carboxamido)pyrrolidine, 2-hydroxymethylpyrrolidine, 3 , 4-dihydroxy-2-hydroxymethylpyrrolidine, 3-hydroxy- pyrrolidine, 3 , 4-dihydroxypyrrolidine, 3-amino- pyrrolidine, 3-methylaminopyrrolidine, 4-amino-3- hydroxypyrrolidine, 3-hydroxy-4- (2-hydroxyethyl) - a inopyrrolidine, piperidine, 2 , 6-dimethylpiperidine, 2-carbόxypiperidine, 2-carboxamidopiperidine, 2-hydroxymethylpiperidine, 3-hydroxy-2-hydroxymethyl- piperidine, 3-hydroxypiperidine, 4-hydroxypiperidine, 3-hydroxymethylpiperidine, homopiperidine, 2-carboxy-
homopiperidine, 2-carboxamidohomopiperidine, homo- piperazine, N-methylhomopiperazine and N-β-hydroxyethylhomopiperazine, and the addition salts thereof. Preferably, Ri and R2 form, together with the nitrogen atom to which they are attached, a heterocycle chosen from pyrrolidine, 3-hydroxypyrrolidine, 3-amino- pyrrolidine, proline, 3-hydroxyproline, piperidine, 3-hydroxypiperidine, 4-hydroxypiperidine, homopiperidine, homopiperazine,, N-methylhomopiperazine and N-β-hydroxyethylhomopiperazine, and the addition salts thereof . Examples that may be mentioned for R3 include the radicals R9S02NH- or a radical Rι0C(O)NH- with R9 and Rio, which may be identical or different, chosen from a methyl, methyl, ethyl, (iso)propyl, 2-hydroxyethyl, 1-hydroxyethyl, 2-carboxyethyl, 2-aminoethyl, 2- (dimethylamino ) ethyl , 2- (acylamino) ethyl , 2-methoxyethy1 , phenyl, 4-aminophenyl, 4-hydroxyphenyl, 4-diethyl- aminophenyl, pyrazolyl, thiazolyl, pyridyl or thienyl. According to one particular embodiment, when
R3 is an aromatic heterocycle, it is preferably chosen from pyridyl, pyrimidinyl, pyrazolyl, thiazolyl, furyl, imidazolyl and thienyl heterocycles . According to one preferred embodiment, R3 represents a radical R9S02NH- or a radical Rι0C(O)NH-; with Rg and Rio, which may be identical or different, ' representing:
- a phenyl radical or a 5- or 6-membered aromatic heterocycle such as pyridyl, pyrimidinyl, pyrazolyl, thiazolyl, furyl, i idazolyl or thienyl, these radicals being optionally substituted with one or more radicals chosen from halogens and hydroxyl, C1-C4 alkoxy, carboxyl, mono- or di (C1-C4) alkylcarboxamido or R11R12 radicals, or a C1-C4 alkyl radical optionally substituted with one or more hydroxyl, C1-C4 alkoxy, carboxyl, mono- or di (C1-C4) alkylcarboxamido or NRι3Ri4 radicals;
- a linear or branched Ci-Cβ alkyl radical substituted with one or more radicals chosen from hydroxyl, Cι-C2 alkoxy, carboxyl, mono- or di (C1-C4) alkylcarboxamido, (C1-C4) alkylsulphonyl, sulphonic, (C1-C4) alkyl sulphoxide, alkyl- sulphonamide and NRι6Rι radicals;
- R11, Ri2/ R-13/ Ri4# R-16 and Ri7, which may be identical or different, represent a hydrogen atom, acyl, a carboxamido or a C1-C4 alkyl radical optionally substituted with one or more hydroxyl, C1-C4 alkoxy, (C1-C4) alkylsulphonyl, (C1-C4) alkylsulphonamido, carboxyl, mono- or di (C1-C4) alkylcarboxamido, (C1-C4) alkyl sulphoxide, amino, (di) (C1-C4) alkylamino or (poly)hydroxy (C2-C4) alkylamino radicals . According to one particular embodiment, R3
represents a radical RgS02NH- or a radical RιoC(0)NH- with Rg and R10, which may be identical or different, chosen from an alkyl radical, a phenyl radical, a pyrazolyl radical, a thiazolyl radical, a pyridyl radical or a thienyl radical, these radicals possibly being substituted. Preferably, R10 represents a methyl, ethyl, 2-hydroxyethyl, 2-carboxyethyl, phenyl, pyrazolyl, thienyl or pyridyl radical and Rg represents a methyl, phenyl or tolyl radical. In formula (I) above, X preferably represents a hydrogen atom, a chlorine atom or an alkoxy radical, for example methoxy. Among the derivatives of formula (I) that are useful in the present invention, in particular in the composition of the invention, mention may be made of the following compounds:
5-amino-2-methylsulphonylaminothiazole
5-amino-2-phenylsulphonylaminothiazole
5-amino-2-tolylsulphonylaminothiazole 5-amino-2-thiazolylsulphonylaminothiazole 5-amino-2-pyridylsulphonylaminothiazole
5-amino-2-phenacylaminothiazole 5-amino-2- (pyrid-2-yl) acylaminothiazole 5-amino-2- (pyrid-3-yl) acylaminothiazole 5-amino-2- (pyrid-4-yl) acylaminothiazole 5-amino-2-acetylaminothiazole 5-amino-2-isopropylacylaminothiazole
-amino-2- (thien-2-yl) acylaminothiazole -methylamino-2-methylsulphonylaminothiazole 5-methylamino-2-phenylsulphonylaminothiazole 5-methylamino-2-tolylsulphonylaminothiazole
5-methylamino-2-thiazolylsulphonylaminothiazole 5-methylamino-2-pyridylsulphonylaminothiazole 5-methylamino-2-phenacylaminothiazole 5-methylamino-2- (pyrid-2-yl) acylaminothiazole 5-methylamino-2- (pyrid-3-yl) acylaminothiazole 5-methylamino-2- (pyrid-4-yl) acylaminothiazole 5-methylamino-2-acetylaminothiazole 5-methylamino-2-isopropylacylaminothiazole 5-methylamino-2- (thien-2-yl) acylaminothiazole
5- (2-hydroxyethyl) amino-2-methylsulphonylaminothiazole 5- (2-hydroxyethyl) amino-2-phenylsulphonylaminothiazole 5- (2-hydroxyethyl) amino-2-tolylsulphonylaminothiazole 5- (2-hydroxyethyl) amino-2-thiazolylsulphonylamino- thiazole
5- (2-hydroxyethyl) amino-2-pyridylsulphonylaminothiazole 5- (2-hydroxyethyl) amino-2-phenacylaminothiazole 5- (2-hydroxyethyl) amino-2- (pyrid-2-yl) acylaminothiazole 5- (2-hydroxyethyl) amino-2- (pyrid-3-yl) acylaminothiazole 5- (2-hydroxyethyl) amino-2- (pyrid-4-yl) acylaminothiazole 5- (2-hydroxyethyl) amino-2-acetylaminothiazole 5- (2-hydroxyethyl) amino-2-isopropylacylaminothiazole
- (2-hydroxyethyl) amino-2- (thien-2-yl) acylaminothiazole -amino-4-chloro-2-methylsulphonylaminothiazole -amino-4-chloro-2-phenylsulphonylaminothiazole -amino-4-chloro-2-tolylsulphonylaminothiazole -amino-4-chloro-2-thiazolylsulphonylaminothiazole -amino-4-chloro-2-pyridylsulphonylaminothiazole -amino-4-chloro-2-phenacylaminothiazole -amino-4-chloro-2- (pyrid-2-yl) acylaminothiazole -amino-4-chloro-2- (pyrid-3-yl) acylaminothiazole -amino-4-chloro-2- (pyrid-4-yl) acylaminothiazole 5-amino-4-chloro-2-acetylaminothiazole 5-amino-4-chloro-2-isopropylacylaminothiazole 5-amino-4-chloro-2- (thien-2-yl) acylaminothiazole
5-methylamino-4-chloro-2-methylsulphonylaminothiazole 5-methylamino-4-chloro-2-phenylsulphonylaminothiazole 5-methylamino-4-chloro-2-tolylsulphonylaminothiazole 5-methylamino-4-chloro-2-thiazolylsulphonylamino- thiazole 5-methylamino-4-chloro-2-pyridylsulphonylaminothiazole 5-methylamino-4-chloro-2-phenacylaminothiazole 5-methylamino-4-chloro-2- (pyrid-2-yl) acylaminothiazole 5-methylamino-4-chloro-2- (pyrid-3-yl) acylaminothiazole 5-methylamino-4-chloro-2- (pyrid-4-yl) cylaminothiazole 5-methylamino-4-chloro-2-acetylaminothiazole
5-methylamino-4-chloro-2-isopropylacylaminothiazole 5-methylamino-4-chloro-2- (thien-2-yl) acylaminothiazole
5- (2-hydroxyethyl) amino-4-chloro-2-methylsulphonyl- aminothiazole
5- (2-hydroxyethyl) amino-4-chloro-2-phenylsulphonyl- aminothiazole
5- (2-hydroxyethyl) amino-4-chloro-2-tolylsulphonyl- aminothiazole
5- (2-hydroxyethyl) amino-4-chloro-2-thiazolylsulphonyl- aminothiazole 5- (2-hydroxyethyl) amino-4-chloro-2-pyridylsulphonyl- aminothiazole
5- (2-hydroxyethyl) amino-4-chloro-2-phenacylaminothiazole 5- (2-hydroxyethyl) amino-4-chloro-2- (pyrid-2-yl)acyl- aminothiazole
5- (2-hydroxyethyl) amino-4-chloro-2- (pyrid-3-yl) acylaminothiazole
5- (2-hydroxyethyl) amino-4-chloro-2- (pyrid-4-yl) acylaminothiazole 5- (2-hydroxyethyl) amino-4-chloro-2-acetylaminothiazole 5- (2-hydroxyethyl) amino-4-chloro-2-isopropylacyl- aminothiazole
5- (2-hydroxyethyl) amino-4-chloro-2- (thien-2-yl) acylaminothiazole
5- (pyrrolidin-1-yl) -2-methylsulphonylaminothiazole 5- (pyrrolidin-1-yl) -2-phenylsulphonylaminothiazole
- (pyrrolidin-1-yl) -2-tolylsulphonylaminothiazole - (pyrrolidin-1-yl) -2-thiazolylsulphonylaminothiazole - (pyrrolidin-1-yl) -2-pyridylsulphonylaminothiazole 5- (pyrrolidin-1-yl) -2-phenacylaminothiazole 5- (pyrrolidin-1-yl) -2- (pyrid-2-yl) acylaminothiazole 5- (pyrrolidin-1-yl) -2- (pyrid-3-yl) acylaminothiazole 5- (pyrrolidin-1-yl) -2- (pyrid-4-yl) acylaminothiazole 5- (pyrrolidin-1-yl) -2-acetylaminothiazole 5- (pyrrolidin-1-yl) -2-isopropylacylaminothiazole 5- (pyrrolidin-1-yl) -2- (thien-2-yl) acylaminothiazole
5- (pyrrolidin-1-yl) -4-chloro-2-methylsulphonylamino- thiazole
5- (pyrrolidin-1-yl) -4-chloro-2-phenylsulphonylamino- thiazole
5- (pyrrolidin-1-yl) -4-chloro-2-tolylsulphonylamino- thiazole
5- (pyrrolidin-1-yl) -4-chloro-2-thiazolylsulphonyl- aminothiazole 5- (pyrrolidin-1-yl) -4-chloro-2-pyridylsulphonylamino- thiazole
5- (pyrrolidin-1-yl) -4-chloro-2-phenacylaminothiazole 5- (pyrrolidin-1-yl) -4-chloro-2- (pyrid-2-yl) acylaminothiazole 5- (pyrrolidin-1-yl) -4-chloro-2- (pyrid-3-yl) acylaminothiazole 5- (pyrrolidin-1-yl) -4-chloro-2- (pyrid-4-yl) acylamino-
thiazole
5- (pyrrolidin-1-yl) -4-chloro-2-acetylaminothiazole 5- (pyrrolidin-1-yl) -4-chloro-2-isopropylacylaminothiazole 5- (pyrrolidin-1-yl) -4-chloro-2- (thien-2-yl) acylaminothiazole and also the addition salts thereof with an acid or a base. According to one particular embodiment, the thiazole derivative corresponds to formula (lb)
in which R3 is as defined above. A derivative of formula (I) of the invention that is more particularly preferred is 5- (pyrrolidin- 1-yl) -2- (thien-2-yl) acylaminothiazole and the addition salts thereof . Another subject of the invention is a dye composition comprising, in a suitable medium, at least one oxidation base and, as coupler, at least one thiazole derivative of formula (I) . The composition of the present invention is particularly useful for the oxidation dyeing of keratin fibres and in particular of human keratin fibres .
The oxidation bases that may be used in the composition of the present invention are the oxidation bases conventionally used in oxidation dyeing. By way of example, these oxidation bases are chosen from oxidation bases, for example para-phenylenediamines, bis (phenyl) alkylenediamines, para-aminophenols, ortho- aminophenols and heterocyclic bases, and the addition salts thereof with an acid or a base. Among the para-phenylenediamines that may be mentioned, are pa a-phenylenediamine, para-tolylene- diamine, 2-chloro-para-phenylenediamine, 2, 3-dimethyl- para-phenylenediamine, 2 , 6-dimethyl-para-phenylene- diamine, 2 , 6-diethyl-para-phenylenediamine, 2,5-di- methyl-para-phenylenediamine, N,N-dimethyl-para- phenylenediamine, N,N-diethyl-para-phenylenediamine, N,N-dipropyl-para-phenylenediamine, N,N-diethyl-3- methyl-para-phenylenediamine, N,N-bis (β-hydroxyethyl) - para-phenylenediamine, N,N-bis (β-hydroxyethyl) -2- methyl-para-phenylenediamine, N,N-bis (β-hydroxyethyl) - 2-chloro-para-phenylenediamine, 2-β-hydroxyethyl-para- phenylenediamine, 2-fluoro-para-phenylenediamine, 2-isopropyl-para-phenylenediamine, N- (β-hydroxypropyl) - para-phenylenediamine, 2-hydroxymethy1-para- phenylenediamine, N,N-dimethyl-3-methyl-para- phenylenediamine, N-ethyl-N- (β-hydroxyethyl) -para- phenylenediamine, N- (β,γ-dihydroxypropyl) -para- phenylenediamine, N- (4 ' -aminophenyl) -para-
phenylenediamine, N-phenyl-para-phenylenediamine, 2-β- hydroxyethyloxy-para-phenylenediamine, 2-β-acetylamino- ethyloxy-para-phenylenediamine, N- (β-methoxyethyl)para- phenylenediamine, 4-aminophenylpyrrolidine, 2-thienyl- para-phenylenediamine, 2-β-hydroxyethylamino-5-amino- toluene, and the addition salts thereof with an acid or a base. Among the para-phenylenediamines mentioned above, para-phenylenediamine, para-tolylenediamine, 2-isopropyl-para-phenylenediamine, 2-β-hydroxyethyl- para-phenylenediamine, 2-β-hydroxyethyloxy-para- phenylenediamine, 2, 6-dimethyl-para-phenylenediamine, 2 , 6-diethyl-para-phenylenediamine, 2 , 3-dimethyl-para- phenylenediamine, N,N-bis (β-hydroxyethyl) -para- phenylenediamine, 2-chloro-para-phenylenediamine and 2-β-acetylaminoethyloxy-para-phenylenediamine, and the addition salts thereof with an acid or a base, are particularly preferred. Among the bis (phenyl) alkylenediamines that may be mentioned, for example, are N,N' -bis (β-hydroxyethyl) -N,N' -bis (4'-aminophenyl) -1, 3-diaminopropanol, N,N' -bis (β-hydroxyethyl) -N,N' -bis (4 ' -aminophenyl) - ethylenediamine, N,N' -bis (4-aminophenyl) tetramethylenediamme, N,N' -bis (β-hydroxyethyl) -N,N' -bis (4-amino- phenyl) tetramethylenediamine, N,N' -bis (4-methylamino- phenyl) tetramethylenediamine, N,N' -bis (ethyl) -N,N' -bis- (4 ' -amino-3 ' - ethylphenyl) ethylenediamine and 1, 8-bis-
(2 , 5-diaminophenoxy) -3 , 6-dioxaoctane, and the addition salts thereof with an acid or a base. Among the para-aminophenols that may be mentioned, for example, are para-aminophenol, 4-amino- 3-methylphenol, 4-amino-3-fluorophenol, 4-amino-
3-hydroxymethylphenol, 4-amino-2-methylphenol, 4-amino- 2-hydroxymethylphenol, 4-amino-2-methoxymethylphenol, 4-amino-2-aminomethylphenol, 4^amino-2- (β-hydroxyethyl- aminomethyl)phenol and 4-amino-2-fluorophenol, and the addition
' salts thereof with an acid or a base. Among the ortho-aminophenols that may be mentioned, for example, are 2-aminophenol, 2-amino-5- ethylphenol, 2-amino-6-methylphenol and 5-acetamido-2- a inophenol, and the addition salts thereof with an acid or a base. Among the heterocyclic bases that may be mentioned, for example, are pyridine derivatives, pyrimidine derivatives and pyrazole derivatives . Among the pyridine
' derivatives that may be mentioned are the compounds described, for example, in patents GB 1 026 978 and GB 1 153 196, such as 2,5-di- aminopyridine, 2- (4-methoxyphenyl) amino-3-amino- pyridine, 2, 3-diamino-6-methoxypyridine, 2- (β-methoxy- ethyl) amino-3-amino-6-methoxypyridine and 3,4-diamino- pyridine, and the addition salts thereof with an acid or a base. Among the pyrimidine derivatives that can be
mentioned are the compounds described, for example, in patents DE 2 359 399; JP 88-169 571; JP 05-163 124; EP 0 770 375 or patent application WO 96/15765, such as 2,4,5, 6-tetraaminopyrimidine, 4-hydroxy-2 , 5 , 6-triamino- pyrimidine, 2-hydroxy-4, 5 , 6-triaminopyrimidine, 2,4-di- hydroxy-5 , 6-diaminopyrimidine and 2,5, 6-triaminopyrimidine, and pyrazolopyrimidine derivatives such as those mentioned in patent application FR-A-2 750 048 and among which mention may be made of pyrazolo [1, 5-a] - pyrimidiιie-3 , 7-diamine; 2 , 5-dimethylpyrazolo [1, 5-a] - pyrimidine-3, 7-diamine; pyrazolo [1, 5-a]pyrimidine-3 , 5- diamine; 2, 7-dimethylpyrazolo [1, 5-a]pyrimidine-3 , 5- diamine; 3-aminopyrazolo [1, 5-a]pyrimidin-7-ol; 3-amino- pyrazolo [1, 5-a]pyrimidin-5-ol; 2- (3-aminopyrazolo- [1, 5-a]pyrimidin-7-ylamino) ethanol, 2- (7-aminopyrazolo- [1, 5-a]pyrimidin-3-ylamino) ethanol, 2-[ (3-aminopyrazolo [1, 5-a]pyrimidin-7-yl) (2-hydroxyethyl) amino] - ethanol, 2- [ (7-aminopyrazolo [1, 5-a]pyrimidin-3-yl) - (2-hydroxyethyl) amino] ethanol, 5, 6-dimethylpyrazolo- [1, 5-a] pyrimidine-3 , 7-diamine, 2 , 6-dimethylpyrazolo- tl, 5-a]pyrimidine-3 , 7-diamine, 2, 5,N7,N7-tetramethyl- pyrazolo.l, 5-a]pyrimidine-3, 7-diamine and 3-amino- 5-methyl-7-imidazolylpropylaminopyrazolo [1, 5-a] - pyrimidine, and the addition salts thereof with an acid and the tautomeric forms thereof, when a tautomeric equilibrium exists. Among the pyrazole derivatives that may be
mentioned are the compounds described in patents DE 3 843 892 and DE 4 133 957 and patent applications WO 94/08969, WO 94/08970, FR-A-2 733 749 and DE 195 43 988, such as 4, 5-diamino-l-methylpyrazole, 4, 5-diamino-l- (β-hydroxyethyl) pyrazole, 3,4-diamino- pyrazole, 4, 5-diamino-l- (4 ' -chlorobenzyl)pyrazole, 4, 5-diamino-l, 3-dimethylpyrazole, 4, 5-diamino-3-methyl- 1-phenylpyrazole, 4, 5-diamino-l-methyl-3-phenyl- pyrazole, 4-amino-1, 3-dimethyl-5-hydrazinopyrazole, l-benzyl-4, 5-diamino-3-methylpyrazole, 4, 5-diamino-3- tert-butyl-1-methylpyrazole, 4, 5-diamino-l-tert-butyl- 3-methylpyrazole, 4, 5-diamino-l- (β-hydroxyethyl) - 3-methylpyrazole, 4, 5-diamino-l-ethyl-3-methylpyrazole, 4, 5-diamino-l-ethyl-3- (4' -methoxyphenyl)pyrazole, 4, 5-diamino-l-ethyl-3-hydroxymethylpyrazole, 4, 5-diamino-3-hydroxymethyl-l-methylpyrazole, 4, 5-diamino-3-hydroxymethyl-l-isopropylpyrazole, 4, 5-diamino-3-methyl-l-isopropylpyrazole, 4-amino-5- (2 ' -aminoethyl) amino-1, 3-dimethylpyrazole, 3 , 4, 5-triaminopyrazole, 1-methyl-3 , 4, 5-triamino- pyrazole, 3 , 5-diamino-l-methyl-4-methylaminopyrazole and 3 , 5-diamino-4- (β-hydroxyethyl) amino-1-methyl- pyrazole, and the addition salts thereof with an acid or a base. The oxidation base(s) is (are) each generally present in an amount of between 0.001% and 10% and preferably between 0.005% and 6% by weight
approximately relative to the total weight of the dye composition. The composition according to the invention may also contain one or more couplers conventionally used for oxidation dyeing of human keratin fibres . Among these additional couplers, mention may be made especially of meta-phenylenediamines, meta-amino- phenols, meta-diphenols, naphthalene-based couplers and heterocyclic couplers other than the thiazole derivatives of formula (I) of the invention, and the addition salts thereof with an acid or a base. Examples that may be mentioned include 2-methyl-5-aminophenol, 5-N- (β-hydroxyethyl) amino- 2-methylphenol, 6-chloro-2-methyl-5-aminophenol, 3-aminophenol, 1, 3-dihydroxybenzene, 1, 3-dihydroxy- 2-methylbenzene, 4-chloro-l, 3-dihydroxybenzene, 2 , 4-diamino-l- (β-hydroxyethyloxy)benzene, 2-amino- 4- (β-hydroxyethylamino) -1-methoxybenzene, 1, 3-diamino- benzene, 1, 3-bis (2, 4-diaminophenoxy)propane, 3-ureido- aniline, 3-ureido-l-dimethylaminobenzene, sesamol, l-β-hydroxyethylamino-3 , 4-methylenedioxybenzene, α-naphthol, 2-methyl-l-naphthol, 6-hydroxyindole, 4-hydroxyindole, 4-hydroxy-N-methylindole, 2-amino- 3-hydroxypyridine, 6-hydroxybenzomorpholine, 3,5-di- amino-2, 6-dimethoxypyridine, 1-N- (β-hydroxyethyl) amino- 3, 4-methylenedioxybenzene and 2, 6-bis (β-hydroxyethylamino) toluene and the addition salts thereof with an
acid or a base. In the composition of the present invention, the coupler (s) is (are) each generally present in an amount ranging from 0.001% to 10% by weight approximately, and more preferably from 0.005% to 6% by weight, relative to the total weight of the dye composition. In general, the addition salts of the oxidation bases and couplers that may be used in the context of the invention are chosen especially from the addition salts with an acid, such as the hydro- chlorides, hydrobromides , sulphates, citrates, succinates, tartrates, lactates, tosylates, benzene- sulphonates, phosphates and acetates, and the addition salts with a base, such as sodium hydroxide, potassium hydroxide, ammonia, amines or alkanolamines . The dye composition according to the invention may also contain one or more direct dyes, which may be chosen in particular from nitrobenzene dyes, azo direct dyes and methine direct dyes. These direct dyes may be of nonionic, anionic or cationic nature. The medium that is cosmetically suitable for dyeing, also known as the dye support, generally consists of water or a mixture of water and at least one organic solvent to dissolve the compounds that would not be sufficiently soluble in water. As organic
solvent, mention may be made, for example, of C1-C4 lower alkanols, such as ethanol and isopropanol, polyolε and polyol ethers, such as 2-butoxyethanol, propylene glycol, propylene glycol monomethyl ether, diethylene glycol monoethyl ether and monomethyl ether, as well as aromatic alcohols such as benzyl alcohol or phenoxyethanol, and mixtures thereof. The solvents are preferably present in proportions of between 1% and 40% by weight approximately relative to the total weight of the dye composition, and even more preferably between 5% and 30% by weight approximately. The dye composition in accordance with the invention may also contain various adjuvants conventionally used in compositions for dyeing the hair, such as anionic, cationic, nonionic, amphoteric or zwitterionic surfactants, or mixtures thereof, anionic, cationic, nonionic, amphoteric or zwitterionic polymers or mixtures thereof, mineral or organic thickeners, and in particular anionic, cationic, nonionic and amphoteric polymeric associative thickeners, antioxidantε, penetration agents, sequestering agents, fragrances, buffers, dispersing agents, conditioners, for instance volatile or non- volatile, modified or unmodified silicones, film- forming agents, ceramides, preserving agents and opacifiers .
The above adjuvants are generally present in an amount for each of between 0.01% and 20% by weight relative to the weight of the composition. Needless to say, a person skilled in the art will take care to select this or these optional additional compound (s) such that the advantageous properties intrinsically associated with the oxidation dye composition in accordance with the invention are not, or are not substantially, adversely affected by the envisaged addition (s) . The pH of the dye composition in accordance with the invention is generally between 3 and 12 approximately and preferably between 5 and 11 approximately. It may be adjusted to the desired value by means of acidifying or basifying agents usually used for dyeing keratin fibres, or alternatively using standard buffer systems. Among the acidifying agents that may be mentioned, for example, are mineral or organic acids, for instance hydrochloric acid, orthophosphoric acid, sulphuric acid, carboxylic acids, for instance acetic acid, tartaric acid, citric acid or lactic acid, and sulphonic acids. Among the basifying agents that may be mentioned, for example, are aqueous ammonia, alkaline carbonates, alkanolamines such as monoethanolamine, diethanolamine and triethanolamine and derivatives
thereof, sodium hydroxide, potassium hydroxide and the derivatives of formula (II) below:

R<=
Rd(ll)
in which W is a propylene residue optionally substituted with a hydroxyl group or a C1-C4 alkyl radical; Ra, Rb Re and Ra, which may be identical or different, .represent a hydrogen atom or a C1-C4 alkyl or C1-C4 hydroxyalkyl radical. The dye composition according to the invention may be in various forms, such as in the form of liquids, creams or gels, or in any other form that is suitable for dyeing keratin fibres, and especially human hair. The process of the present invention is a process in which the composition according to the present invention as defined above is applied to the fibres, in the presence of an oxidizing agent for a time which is sufficient to obtain the desired coloration. The colour may be revealed at acidic, neutral or alkaline pH and the oxidizing agent may be added to the composition of the invention just at the time of use, or it may be introduced using an oxidizing composition containing it, applied simultaneously with or sequentially to the composition of the invention. According to one particular embodiment, the
composition according to the present invention is mixed, preferably at the time of use, with acomposition containing, in a medium that is suitable for dyeing, at least one oxidizing agent, this oxidizing agent being present in an amount that is sufficient to develop a coloration. The mixture obtained is then applied to the keratin fibres. After a leave-in time of 3 to 50 minutes approximately and preferably 5 to 30 minutes approximately, the keratin fibres are rinsed, washed with shampoo, rinsed again and then dried. The oxidizing agents conventionally used for the oxidation dyeing of keratin fibres are, for example, hydrogen peroxide, urea peroxide, alkali metal bromates, persalts such as perborates and persulphates, peracids, and oxidase enzymes, among which mention may be made of peroxidases, 2-electron oxidoreductases such as uricases, and 4-electron oxygenases, for instance laccases. Hydrogen peroxide is particularly preferred. The oxidizing composition may also contain various adjuvants conventionally used in hair dye compositions and as defined above. The pH of the oxidizing composition containing the oxidizing agent is such that, after mixing with the dye composition, the pH of the resulting composition applied to the keratin fibres preferably ranges between 3 and 12 approximately and
even more preferably between 5 and 11. It may be adjusted to the desired value by means of acidifying or basifying agents usually used in the dyeing of keratin fibres and as defined above. The ready-to-use composition that is finally applied to the keratin fibres may be in various forms, such as in the form of liquids, creams or gels, or in any other form that is suitable for dyeing keratin fibres, and especially human hair. A subject of the invention is also a multi- compartment device or dyeing "kit", in which a first compartment contains the dye composition defined above and a second compartment contains an oxidizing agent. This device may be equipped with a means for applying the desired mixture to the hair, such as the devices described in patent FR 2 586 913 in the name of the Applicant . Using this device, it is possible to dye keratin fibres using a process that involves mixing a dye composition comprising at least one oxidation base of formula (I) with an oxidizing agent, and applying the mixture obtained to the keratin fibres for a time that is sufficient to develop the desired coloration. The derivatives of formula (I) may be obtained according to the synthetic methods known in the field of heterocyclic synthesis. Reference may be made, for example, to the publications EP 1256578,
US 61143665, WO 97/47299, EP 402716, DE 3842970, DE 3518520, Khimico Farmaberticheskii Zhurnal 1983, 17(11), 1340-2, J. Org. Chem. , 1975, 40(9), 1275-8. The derivatives of the present invention are obtained, for example, from thiazole reagents substituted with a nitro radical, which are reduced via standard reduction methods . A first method consists in treating 2,4-di- chlorothiazole with nitric acid to give 5-nitro-2, 4-di- chlorothiazole 2, which reacts at temperatures of between 0°C and 130°C in a polar solvent, with primary, secondary or tertiary amines, and in particular with ammonia, to give the 2-amino-4-chloro-5-nitrothiazole compounds 3_. The acylation reaction of the a ine in position 2 is performed according to the standard methods (for example, refer to Advanced Organic 1
Chemistry, 3rd edition, J. March, Willey Interscience) with an acyl chloride Rι
0-COCl or an anhydride (Rιo-C0)
2-0, in aprotic solvents with a boiling point of between 45°C and 180°C, to give the compounds of formulae 4. The nitro group is then reduced via the action of a metal such as iron, tin or zinc and in the catalytic presence of an acid such as protic acids, for instance HC1, HBr or NH
4CI, to give the 5-amino-4- chloro-2-acylaminothiazoles 5. This product is then subjected to a standard alkylation reaction (for example, refer to Advanced Organic Chemistry, 3rd
edition, J. March, Willey Interscience) with alkyl halides or alkyl O-sulphonates to give the desired compounds 6. The compounds of formula 7 are obtained by reaction of alkyl or arylsulphonyl halides with the amine 3>, in aprotic solvents with a boiling point of between 45°C and 180°C. The reactions for reduction of the nitrothiazole group 7 and then for alkylation of the amine thus obtained are performed as mentioned above.
2
3 1
8 The compounds 10 (or 12,
"respectively) are obtained by heterogeneous catalytic hydrogenation of the compounds 4 (or 7, respectively) , the catalyst possibly being, for example, palladium-on-charcoal, Raney nickel or palladium dihydroxide, in a polar solvent with a boiling point of between 60°C and 180°C, The 5-aminothiazole derivatives 10 and 12 are then reacted with electrophiles (halides, O-sulphonates, etc.) to give the desired compounds 11 and 13.
A second method consists in reacting commercial 2-amino-5-bromothiazole 14 with nitric acid in the presence of tetrafluoroboric acid and copper to give the nitro derivative 15. The bromine becomes labile and is reacted with amines NHRιR
2 in polar solvents with boiling points of between 65°C and 180°C, to give the 2-nitro-5-aminothiazole derivatives ,16. The reduction of the nitro group via standard methods (Reduction in Organic Chemistry, M. Hudlicky, Ellis Horwood series chemical Science) , for example via heterogeneous catalytic hydrogenation with Pd(0) or Pd(II) on charcoal, gives the diamine compounds 17. The acylation reaction of the amine in position 2 is performed according to the standard methods (for example, refer to Advanced Organic Chemistry, 3rd edi tion, J. March, Willey Interscience) with an acyl chloride Rι
0-COCl or an anhydride (Rι
0-CO)
2-O, in aprotic solvents with a boiling point of between 45°C and
180°C, to give the compounds of formula 18. The compounds of formula 21 are obtained via reaction of alkyl or arylsulphonyl halides with the amine 17 in aprotic solvents with a boiling point of between 45°C and 180°C. The introduction of the halogen atom into position 4 of the thiazole derivatives 18 and 21 is performed via the action of N-chlorosuccinimide or N-bromosuccinimide according to the standard methods, and allows access to compounds 19 and 22. The introduction of an alkoxy, aryloxy or alkylthio group is performed via substitution of the halogen with the corresponding alkoxide or thioalkoxide anion and allows compounds 2TJ and 2Z_ to be obtained. Λ f
NM"> UUNNOO,,
BΓ"^
^fΛ\' if-
1 0υ== NN1111..00IH1
R "''
R">'
N"^^
S"V /f
Nm0»> ""''
R WΛ
N~^-^rT"
S -NH, PάlC
„
21 22 X, * Cl, Br .- X = OR, OΛr,SR Finally, a subject of the invention is the intermediate nitro derivatives of formula:
in which R9 and RIO are as defined above. The examples that follow serve to illustrate the invention without, however, being limiting in nature . EXAMPLES 1 mmol of 5-nitro-2- (thien-2-yl) acylaminothiazole derivative is added to 10 ml of an aqueous- alcoholic solution (80/20 ethanol/water) containing 10% of protic acid such as hydrochloric acid, ammonium chloride, acetic acid or sulphuric acid, and 0.5 g of zinc in powder form, at a temperature of 80°C. After total consumption of the nitro starting material, the reaction mixture is concentrated until a solid precipitates out, which is filtered off by suction, washed with diisopropyl ether and dried under vacuum to constant weight. 5-Amino-2- (thien-2-yl) acylaminothiazole (C
8H
7N
3OS2) is thus obtained: 95% yield.
Examples of dyeing Example 1 The compositions below were prepared using the above compound:
( * ) Dye support (1) pH 9.5 DMSO 0.18 g 96° ethyl alcohol 9.3 g Methyl alcohol 39.7 g Acetic acid 4.4 g Sodium metabisulphite 0.204 g Pentasodium salt of diethylene 1.1 g triaminopentaacetic acid, as an aqueous 40% solution C
.8-C
15 alkyl polyglucoside sold as 5.3 g 60% solution under the name Oramix CG110 by the company SEPPIC Benzyl alcohol 1.8 g Polyethylene glycol containing 2.7 g 8 mol of EO pH 9.5 buffer of NH
4Cl/aqueous 31.0 g ammonia containing 20% NH
3 At the time of use, the composition is mixed
with one third of its weight of 20-volumes aqueous hydrogen peroxide solution (6% by weight) . The mixture obtained is applied to a lock of grey hair containing 90% white hairs. After a leave-in time of 30 minutes, the lock is rinsed, washed with a standard shampoo, rinsed again and then dried. The shade obtained is dark purple. Example 2 The compositions below were prepared using the above compound:
(*) Dye support (2) pH 7 DMSO 0.18 g 96° ethyl alcohol 9.3 g Methyl alcohol 39.7 g Acetic acid 4.4 g Sodium metabisulphite 0.204 g Pentasodium salt of diethylene 1.1 g triaminopentaacetic acid, as an aqueous 40% solution Cs-Ci
5 alkyl polyglucoside sold as 5.3 g 60% solution under the name Oramix CGI10 by the company SEPPIC
Benzyl alcohol 1.8 g Polyethylene glycol containing 2.7 g 8 mol of EO pH 7 buffer of 0.5M ammonium 31.0 g chloride At the time of use, the composition is mixed with one third of its weight of 20-volumes aqueous hydrogen peroxide solution (6% by weight) . The mixture obtained is applied to a lock of grey hair containing 90% white hairs. After a leave-in time of 30 minutes, the lock is rinsed, washed with a standard shampoo, rinsed again and then dried. The shade obtained is dark purple.