Metaphenylenediamines

Abstract

Couplers having the general formula (I): ##STR1## or the acid salts thereof in which formula R is either(a) hydrogen or(b) a C.sub.1 -C.sub.3 alkyl or(c) a C.sub.1 -C.sub.3 hydroxyalkyl, andZ is either(a) hydroxyalkyl, or(b) alkoxyalkyl in which the alkoxy group contains 1 to 2 carbon atoms, or(c) mesylaminopropyl, or(d) acetylaminoalkyl, or(e) ureidoalkyl, or(f) carbethoxyaminoalkylthe alkyl groups in the radicals constituting z comprising 2 or 3 carbon atoms andZ is not hydroxyethyl when R is hydrogen.These couplers form dyeing compositions when mixed with an oxidation base consisting of a paraphenylenediamine having the general formula: ##STR2##

Description

BACKGROUND

In the field of dyeing keratinic fibers, hair and furs, the metaphenylenediamines play an important role which has been known for a long time. They form part of the class of compounds currently called "couplers". The couplers, in association with the paraphenylenediamines or the paraaminophenols--compounds called oxidation bases--produce in an alkaline oxidizing medium colored indamines, indoanilines or indophenols.

The association of the metaphenylenediamines with the paraphenylenediamines in an oxidizing alkaline atmosphere, and in particular in the presence of hydrogen peroxide, produces indamines capable of imparting to keratinic fibers very strong blue colors.

Moreover, the metaphenylenediamines associated with the paraaminophenols produce in an oxidizing alkaline atmosphere, indoanilines, which impart to keratinic fibers more or less purple-red colorations.

The metaphenylenediamines thus play, when considered as couplers, a double role in capillary dyeing: Contribution of blue and red, that is to say contribution of two fundamental colors which are indispensable to obtain not only blacks and greys, but also burnt or copper chestnuts.

Despite its important role this category of couplers is presently restricted in practice to a very limited number of compounds. This very limited number is explained by the fact that one may only keep for capillary dyeing on the one hand those beneficial compounds of a good innocuousness, and on the other hand the compounds permitting to obtain dyes of good qualities, that is to say, which do not change with time, in particular neither under light, nor inclement weather. By way of example, metatoluylene diamine is not satisfactory for reasons of non-innocuousness, while 1-methyl-2-amino-N-methyl-4-amino benzene, 2-amino-N-methyl-4-amino anisole, 2-amino-4-amino-N-methyl anisole, 2-amino-N-.beta.-hydroxyethyl 4-amino anisole, 1-methyl-2-amino-N-.beta.-hydroxyethyl-4-amino benzene lead to shades which are unstable with time, both in darkness and in the light. This instability is due principally to the ready cyclization into azinic molecules of the indoamines or indoanilines formed in situ during the oxidation dyeing, the azines formed then undergoing rapid photochemical degradation in the light.

THE PRESENT INVENTION

The present invention relates to new chemical compounds which are capable of functioning as couplers usable in hair dyeing compositions. The compounds according to the present invention are particularly usable in capillary dyeing because they combine a very good innocuousness with the dyeing qualities of a good coupler.

More specifically, the present invention involves chemical compounds of the general formula: ##STR3## or the acid salts thereof in which formula R is either

(a) hydrogen or (b) a C.sub.1 -C.sub.3 alkyl or (c) a C.sub.1 -C.sub.3 hydroxyalkyl, and Z is either (a) hydroxylakyl, or (b) alkoxyalkyl in which the alkoxy group contains 1 to 2 carbon atoms, or (c) mesylaminopropyl, or (d) acetylaminoalkyl, or (e) ureidoakyl, or (f) carbethoxyaminoalkyl the alkyl groups in the radicals constituting Z comprising 2 or 3 carbon atoms, and Z is not hydroxyethyl when R is hydrogen.

The compounds of the present invention can be used to form a dyeing composition for keratinic fibers and in particular for hair, said composition containing, in aqueous solution, at least one oxidation base that contains as a coupler, at least one compound of formula (I).

With the greater part of the paraphenylenediamines, in an alkaline oxidizing medium, the compounds of formula (I) impart to the hair strong blue colorations, more or less rich in green or in purple, resistant to the light, to bad weather, and to shampooing.

In a general way, in the dyeing composition containing the compounds of the present invention one may use as oxidation bases the paraphenylenediamines of the general formula (II): ##STR4## or the corresponding acid salts; in which R.sub.1, R.sub.2 and R.sub.3 are identical or different and represent hydrogen, alkyl having 1 to 2 carbon atoms or alkoxy having 1 to 2 carbon atoms, R.sub.4 and R.sub.5 are identical or different and represent hydrogen, alkyl, hydroxyalkyl, alkoxyalkyl, in which the alkoxy group comprises 1 to 2 carbon atoms, carbamylalkyl, mesylaminoalkyl, acetylaminoalkyl, ureidoalkyl, carbethoxyaminoalkyl, the alkyl groups in R.sub.4 and R.sub.5 having 1 to 3 carbon atoms, with the proviso that R.sub.1 or R.sub.3 represent hydrogen when R.sub.4 and R.sub.5 do not represent hydrogen.

It should be noted however, that the paraphenylenediamines having a chlorine or fluorine atom on the ring yield with the compounds (I) violet colorations, which rapidly lose their chromaticity in the light. This is the case, for example, with 3-chloro-4-amino-N-.beta.-hydroxyethyl aniline or 3-fluoro-4-amino-N-.beta.-hydroxyethyl aniline.

To illustrate the invention we hereafter describe by way of purely illustrative and non-limiting examples, the preparation and use of the following specific compounds under formula (I):

1.--(2-amino-4-amino-N-methyl) phenoxyethanol dichlorhydrate 2.--(2,4-diamino)phenylmethoxyethylether dichlorhydrate 3.--(2,4-diamino)phenyl-.beta.-carbethoxyaminoethylether dichlorhydrate 4.--[4-amino-N(.beta.-hydroxyethyl) 2-amino] phenoxyethanol dichlorhydrate 5.--(2,4-diamino)phenoxypropanol dichlorhydrate 6.--(2,4-diamino)phenoxy-.beta.-acetylaminoethylether dichlorhydrate 7.--(2,4-diamino)phenoxy-.beta.-ureidoethylether dichlorhydrate

These seven compounds give, in particular, blue colorations of very good stability with the following oxidation bases: paraphenylenediamine, paratoluylenediamine, 2-methyl 5-methoxy paraphenylenediamine, 2,6-dimethyl-3-methoxy paraphenylenediamine, 2,6-dimethyl paraphenylenediamine, 4-amino-N-methoxyethyl aniline, 4-amino-N,N-ethyl-carbamylmethyl aniline and 4-amino-N,N-di-.beta.-hydroxyethyl aniline.

A certain number of compounds of formula (I) offer, from the dyeing point of view, the supplemental advantage of being able to also give stable reds when they are associated with paraaminophenol or 2-methyl-4-amino phenol. The dyeing compositions containing these compounds may then contain at the same time paraphenylene diamines and paraaminophenols.

For the other compounds of formula (I) which do not offer this supplementary advantage, one may in order to provide the red and violet necessary to the formulation of a capillary dyeing composition, add to the dyeing compositions containing them in addition to the paraphenylenediamines of formula (II) on the one hand leuco derivatives of indoanilines or indophenols such as: the 4,4'-dihydroxy-2-amino-5-methyl diphenylamine, 4,4'-dihydroxy-2-amino-N-.beta.-hydroxyethyl-5-methyl-2'-chloro diphenylamine, 2,4'-diamino-4-hydroxy-5-methyl diphenylamine and on the other hand direct dyes such as, for example, 3-nitro-4-amino-N-.beta.-hydroxyethyl anisole, 3-nitro-4-amino-N-.beta.-hydroxyethyl phenol, 2-.beta.-hydroxyethyl-amino-5-nitro anisole, (3-nitro-4-amino) phenoxyethanol.

Dyeing compositions containing the compounds of the present invention may also contain in addition to the coupler or couplers of the formula (I) and the oxidation base or bases associated therewith, the following products taken singly or in combination:

1. Other known couplers, for example, resorcin, metaaminophenol, 2-methyl-5-amino phenol, 2-methyl-5-amino-N-.beta.-hydroxyethyl phenol, 6-hydroxy benzomorpholine, 2,6-dimethyl-5-acetyl-amino phenol, 2-methyl-5-carbethoxyamino phenol, 2-methoxy-5-carbethoxyamino phenol, 2-methyl-5-ureido phenol;

2. Polyaminophenols, monoaminodiphenols, diaminodiphenols, polyphenols such as trihydroxy-1,2,4-benzene;

3. Leucoderivatives of indoanilines or indophenols;

4. Direct dyes and preferably nitrated dyes of the benzene series such as 1-amino-N,N-di-.beta.-hydroxyethyl-3-nitro-4-amino N'-methyl benzene, 1-amino-N,N-methyl-.beta.-hydroxyethyl-3-nitro-4-amino-N'-.beta.-hydroxyethyl benzene, 1-amino-N,N-methyl-.beta.-hydroxyethyl-3-nitro-4-amino-N'-methyl benzene, 3-nitro-4-amino-N-.beta.-hydroxyethyl anisole, 3-nitro-4-amino-N-.beta.-hydroxyethyl phenol, (3-nitro-4-amino) phenoxyethanol, (3-nitro-4-amino-N-methyl) phenoxyethanol, 2-amino-N-.beta.-hydroxyethyl-5-nitro anisole;

5. Various usual additives such as penetrating agents, foaming agents, thickening agents, anti-oxidizing agents, alkalizing agents, perfumes, sequestrating agents, and film forming products.

The pH of the dyeing compositions described above usually is, for example one between 8 and 11.5. We prefer a pH between about 9 and 10. Among the alkalizing agents which may be used, there can be mentioned ammonia, the alkyl amines the alkanolamines, the hydroxides of sodium or potassium, and the carbonates of sodium, potassium or ammonium.

We may also add to the dye composition hydrosoluble anionic, cationic, non-ionic, or amphoteric surface-active agents. Among the surface active agents particularly useful there may be mentioned the alkyl benzene sulfonates, the alkylnaphthalene sulfonates, the sulfates, ether sulfates and sulfonates of fatty alcohols, quaternary ammonium salts, such as triethyl cetylammonium bromide, cetyl pyridinium bromide, the diethanolamides of fatty acids, the acids and the polyoxyethylenated or polyglycerolated alcohols and the polyoxyethylenated or polyglycerolated alkylphenols. Preferably, the surface active agents are present in the dyeing composition in a proportion between about 0.5 and 55% by weight, and preferably between about 4 and 25% by weight.

One may also add to the dye composition organic solvents to solubilize the compounds which are not sufficiently soluble in water. Among the solvents which may advantageously be used one may mention by way of example ethanol, isopropanol, glycerin, glycols like 2-butoxy ethanol, ethylene glycol, propylene glycol, monoethylether, and monomethylether of diethylene glycol and analogous products. The solvents may advantageously be present in the composition in an amount ranging from 1 to 40% by weight and preferably between 5 and 30% by weight.

The thickening products which may be added to the dye composition may be sodium alginate, gum arabic, cellulose derivatives such as methylcellulose, hydroxyethylcellulose, hydroxypropyl methylcellulose, the sodium salt of carboxymethylcellulose, or polymers of acrylic acid. One may also use mineral thickening agents such as bentonite. Preferably the thickening agents are present in an amount between 0.5 and 5% by weight based on the total weight of the composition and preferably between 0.5 and 3% by weight.

The antioxidizing agents which one may add to the dye composition may be sodium sulfite, thioglycolic acid, the acid sulfite of sodium, ascorbic acid, or hydroquinone. The antioxidizing agents may be present in the composition in an amount between 0.05 and 1% by weight based on the total weight of the composition.

The dyeing composition may contain oxidizing agents such as hydrogen peroxide, urea peroxide, or the persalts such as ammonium persulfate.

In a general way, the compounds of formula (I) are present in the dyeing composition in an amount between 0.001 and 2.5% by weight based on the total weight of the composition.

The dyeing composition may be in the form of a liquid solution, a paste, a cream or gel, or any other appropriate form for bringing about a dyeing of keratinic fibers.

The compounds of formula (I) may be easily prepared from compounds described in French patent applications Nos. 74 36651 filed Nov. 5, 1974 and 76 12985 filed Apr. 30, 1976 and which are incorporated herein by reference.

Beginning with these benzene compounds nitrated in the meta position with respect to the amine group, it suffices to bring about a reduction to transform the nitro group into an amine group and possibly then effectuate the acid hydrolysis in the case in which the starting products comprises an acetylated amine function.

In order that the objectives of the present invention may be better understood, there will hereafter be described, purely by way of illustrative and non-limiting examples, the preparation of several compounds of formula (I) and the use of these compounds in dyeing compositions.

EXAMPLE 1

Preparation of (2-amino 4-N-methyl-amino) phenoxyethanol dichlorhydrate. ##STR5##

The starting compound is described in Example 5 of French Pat. No. 2,290,186 filed Nov. 5, 1974.

In 60 ml of hydrochloric acid (density=1.19 at 75.degree. C.) one adds simultaneously, little by little, under agitation 0.05 mol (10.6 g) of (2-nitro 4-amino-N-methyl) phenoxyethanol and 14.3 g of tin powder. After completion of the additions, one continues the agitation for 15 minutes at 90.degree. C. The reaction mixture is drained hot. Filtrate is evaporated until dry under a vacuum. The residue is dissolved in 300 ml of water and the tin is precipitated in the form of the sulfide by bubbling with hydrogen sulfide. It is filtered. The filtrate is concentrated to 15 ml under a vacuum. The concentrated solution is cooled to -10.degree. C. The dihydrochloride of the expected product crystallizes. It is drained, washed with very little ice water and then vacuum dried. It melts with decomposition at 225.degree. C. The analysis of the product gives the following results:

______________________________________ Calculated for C.sub.9 H.sub.16 N.sub.2 O.sub.2 Cl.sub.2 Found______________________________________C % 42.35 42.08H % 6.27 6.45N % 10.98 10.77Cl % 27.84 27.73______________________________________

EXAMPLE 2

Preparation of (2,4-diamino)phenyl-.beta.-methoxyethylether dichlorhydrate. ##STR6##

First step:

Preparation of (2-acetylamino 4-amino)phenyl-.beta.-methoxyethylether.

To 100 ml of water to which 4 ml of acetic acid have been added and which have already been heated to 90.degree. C., one adds 13 g of powdered iron and, little by little, under agitation, 0.078 mol (20 g) of 2-acetylamino-4-nitro)phenyl-.beta.-methoxy-ethylether (product described in the first step of Example 8 of French Pat. No. 76-12985 filed Apr. 30, 1976, in the name of the applicant). The addition being terminated, one maintains the reaction mixture in the boiling water bath for 30 minutes. It is filtered hot. After the addition of sodium chloride to the filtrate, the expected product precipitates by salting out. It is drained, washed with very little ice water. It melts at 130.degree. C.

Second step:

Preparation of (2,4-diamino)phenyl-.beta.-methoxyethylether dichlorhydrate.

0.067 mol (15 g) of (2-acetylamino 4-amino)phenyl-.beta.-methoxyethylether is introduced into 30 ml of 36% hydrochloric acid. One heats 30 minutes in the boiling water bath. After cooling the dihydrochloride of the expected product crystallizes. It is drained, recrystalized in alcohol, and vacuum dried. The product melts with decomposition at 215.degree. C.

The analysis gives the following results:

______________________________________ Calculated for C.sub.9 H.sub.16 N.sub.2 O.sub.2 Cl.sub.2 Found______________________________________C % 42.35 42.47H % 6.27 `6.34N % 10.98 10.85Cl % 27.84 27.83______________________________________

EXAMPLE 3

Preparation of [4-amino-N(.beta.-hydroxyethyl)2-amino] phenoxyethanol dichlorhydrate. ##STR7##

First step: Preparation of (4-acetylamino 2-nitro)phenoxyethanol.

0.1 mol (19.6 g) of 4-acetylamino 2-nitro phenol in 100 cm.sup.3 of dimethylformamide is heated to 80.degree. C. Then 0.24 mol (16.8 g) of potassium hydroxide at 80% and 0.24 mol (30 g) of glycol bromhydrine are added by fractions during 41/2 hours of heating in a boiling water bath.

The reactive medium is then poured on 300 g. of an ice water mixture. The expected product crystallizes. After filtration, washing and drying, it melts at 169.degree. C.

Second step: Preparation of (4-amino 2-nitro)phenoxyethanol.

0.106 mol of (4-acetylamino 2-nitro) phenoxyethanol (25.5 g) is heated in a boiling water bath in 35 cm.sup.3 of HCl for 45 minutes.

By cooling, the chlorohydrate of the expected product precipitates. After filtration, it is added to 100 g of iced water and neutralized with NH.sub.4 OH. The expected product is filtrated, washed and dried in a vacuum; it melts at 86.degree. C.

Theoretical mass: 198

Molecular mass found by potentiometric titration in CH.sub.3 COOH by HClO.sub.4 N/10: 204

Third step: Preparation of [(3-nitro-4-.beta.-hydroxyethoxy)phenyl] .beta.-chlorethyl carbamate.

0.0605 mol (12 g) of (4-amino 2-nitro) phenoxyethanol is dissolved in 40 cm.sup.3 of dioxane. 0.033 mol (3.3 g) of calcium carbonate is added and the temperature is raised to about 90.degree. C. During agitation, 0.066 mol (9.4 g) of chloroformiate of .beta.-ethyl chloride is added. After this addition, the agitation is continued for 11/2 hours at 90.degree. C. The reactive medium is filtered while hot and 60 g of an ice water mixture is added.

The resulting product which has precipitated is filtrated. After washing and drying, it melts at 84.degree. C.

Fourth step: Preparation of [4-amino-N(.beta.hydroxyethyl) 2-nitro] phenoxyethanol

0.0446 mol (13.6 g) of [(3-nitro 4-.beta.-hydroxyethoxy)phenyl] .beta.-ethylchloride carbamate is added to 51 cm.sup.3 of NaOH 5 N. It is agitated for half an hour at 80.degree. C. The reactive medium is cooled to 0.degree. C. and neutralized with HCl. The resulting product is extracted with methyl-isobutyl-ketone. The solvent is driven out under pressure. The resulting product is in the form of a red oil.

Fifth step: Preparation of [4-amino-N-(.beta.hydroxyethyl) 2-amino] phenoxyethanol dichlorhydrate.

0.0392 mol (9.5 g) of [4-amino-N-(.beta.-hydroxyethyl) 2-nitro] phenoxyethanol in 30 cm.sup.3 of absolute alcohol is reduced on Pd/C at 10% in a bomb under 50 bars of pressure of hydrogen for 45 minutes at 60.degree. C.

After cooling it is percolated thru 0.096 mol (12 cm.sup.3) of hydrochloric alcohol.

The expected dichlorohydrate crystallizes. It is filtrated, washed, dried with ethyl ether, and dried in a vacuum at 55.degree. C. It melts with decomposition at 223.degree. C.

Theoretical mass calculated for C.sub.10 H.sub.16 N.sub.2 O.sub.3 2HCl: 285

Molecular mass obtained by potentiometric titration in water by NaOH N/10: 290.

EXAMPLE 4

Preparation of (2,4 diamino)phenyl .beta.-carbethoxyaminoethylether dichlorhydrate. ##STR8##

(1)--Preparation of (2-acetylamino 4-nitro) phenyl .beta.-carbethoxyaminoethylether

0.088 mole (8.6 ml) of ethyl chloroformiate is introduced into a suspension of 0.04 mole (9.56 g) of (2-acetylamino-4-nitro) phenyl .beta.-aminoethylether and of 0.044 mole (5.6 g) of pure dry sodium carbonate in 40 ml dioxane, heated in a boiling water bath. After 1 hour and 45 minutes of heating, the reaction mixture is poured on 120 ml of slightly acid iced water. The desired product crystallizes. After recrystallization in methyl-iso butylketone, it melts at 170.degree. C.

(2)--Preparation of (2 amino-4-nitro)phenyl .beta.-carbethoxyaminoethylether

0.0167 mole (5.2 g) of the product obtained above are heated for 4 hours in 55 ml of normal hydrochloric acid. After cooling, it is neutralized with NH.sub.4 OH. The desired product crystallizes. After recrystallization in alcohol, it melts at 122.degree. C.

Analysis of the product gives the following results: Elementary analysis calculated for C.sub.11 H.sub.15 N.sub.3 O.sub.5.

______________________________________ Theoretical Found______________________________________C 49.07 49.07H 5.62 5.65N 15.61 15.55______________________________________

(3)--Preparation of dichlorohydrate of (2,4 diamino)phenyl .beta.-carbethoxyaminoethylether

0.0148 mole (4 g) of the product obtained above is placed in 20 ml of absolute alcohol and reduced catalytically on Pd/C at 10% to 60.degree. C. under a hydrogen pressure of 50 bars. After cooling, it is filtered on 6 ml of ethanol saturated with hydrochloric gas. By dilution with ether the desired product crystallizes.

Analysis of the product gives the following results: Elementary analysis calculated on C.sub.11 H.sub.19 N.sub.3 O.sub.3 Cl.sub.2, 1/2 H.sub.2 O.

______________________________________ Theoretical Found______________________________________C 41.12 41.33-41.29H 6.23 6.65-6.35N 13.08 12.68-12.84Cl 22.12 22.05-21.95______________________________________

EXAMPLE 5

Preparation of (2,4-diamino) phenoxypropanol dichlorhydrate. ##STR9##

First Step: Preparation of (2,4-dinitro) phenoxypropanol.

To a mixture of 0.2 mol (40.5 g) of 2,4-dinitro chlorobenzene and of 1.12 mols (81 cm.sup.3) of 1,3-propanediol, heated to 90.degree. C. are added in 30 minutes 1.12 mols (81 cm.sup.3) of 1,3-propanediol in 20 cm.sup.3 of 10 N sodium hydroxide.

After 45 minutes of heating at 90.degree. C., the reactive medium is poured over 250 g of an ice/water mixture. The expected product crystallizes.

After recrystallization in the isopropanol alcohol/ether mixture, one obtains a product melting at 58.degree. C.

Analysis yields the following results:

______________________________________ Calculated for CgH.sub.10 N.sub.2 O.sub.6 Found______________________________________C % 44.63 44.52H % 4.13 4.42N % 11.57 11.34______________________________________

Second Step: Preparation of (2,4-diamino) phenoxypropanol dichlorhydrate.

0.039 mol (9.5 g) of (2,4-dinitro) phenoxypropanol in 30 cm.sup.3 of absolute alcohol is reduced on Pd/C at 10% in a bomb under 25 bars of pressure of hydrogen at 70.degree. C. for 1 hour.

After cooling, it is filtrated on 0.117 mol (17 cm.sup.3) of hydrochloric alcohol (i.e. ethanol into which is bubbled gaseous hydrochloric acid until saturation, e.g. 3-4 hours).

The expected dichlorhydrate crystallizes. The product is dried, washed with alcohol, then with ether and dried in a vacuum. It melts with decomposition at 158.degree. C. Analysis yields the following results:

______________________________________ Calculated for CgH.sub.16 N.sub.2 O.sub.2 Cl.sub.2 Found______________________________________C % 42.35 42.20H % 6.27 6.42N % 10.98 11.13Cl % 27.84 (27.92 )27.84______________________________________

EXAMPLE 6

Preparation of (2,4-diamino)phenyl, .beta.-acetylamino-ethylether dichlorhydrate. ##STR10##

First step: Preparation of (2-acetylamino 4-nitro) phenyl,.beta.-acetylaminoethylether

0.021 mol (2 cm.sup.3) of acetic anhydride is added to the suspension of 0.0167 mol (4 g) of (2-acetylamino 4-nitro) phenyl, .beta.-amino-ethylether in 20 cm.sup.3 of dioxane. After 15 minutes of agitation at 50.degree. C., it is chilled in an ice bath.

The product formed is dried, washed with petroleum ether and dried in a vacuum at 55.degree. C.

It melts at 202.degree.-203.degree. C.

Second step: Preparation of (2-amino 4-nitro) phenyl,.beta.-acetylaminoethylether.

0.00817 mol (2.3 g) of (2-acetylamino 4-nitro) phenyl,.beta.-acetylaminoethylether is heated for one hour in HCl (1 N).

After cooling, it is neutralized with NH.sub.4 OH. The expected product crystallizes. After recrystallization in alcohol, it melts at 126.degree. C.

Elementary analysis yields the following results:

______________________________________ Calculated for C.sub.10 H.sub.13 N.sub.3 O.sub.4 Found______________________________________C % 50.20 50.39H % 5.48 5.41N % 17.57 17.59______________________________________

Third step: Preparation of dichlorhydrate of (2,4-diamino) phenyl,.beta.-acetylaminoethylether.

0.0079 mol (1.9 g) of (2-amino 4-nitro)-phenyl, .beta.-acetylaminoethylether in 30 cm.sup.3 of absolute alcohol is reduced on Pd/C at 10%, under a hydrogen pressure of 30 bars at 60.degree. C. for half an hour.

After cooling, it is percolated through 3 cm.sup.3 of hydrochloric alcohol (ethanol in which is bubbled gaseous hydrochloric acid until saturation, e.g. 3 or 4 hours). By dilution with ether, the expected product crystallizes. After centrifugal drying and then drying in a vacuum, it melts with decomposition starting at 270.degree. C.

Theoretical mass calculated for C.sub.10 H.sub.15 N.sub.3 O.sub.2, 2HCl:282.2

Molecular mass found by potentiometric titration in H.sub.2 O by NaOH N/10.

MW.sub.1 :281. 1st inflection

MW.sub.2 :287.5 2nd inflection

EXAMPLE 7

Preparation of (2,4-diamino) phenyl,.beta.-ureidoethyl ether dichlorhydrate. ##STR11##

First step: Preparation of (2-acetylamino 4-nitro)phenyl,.beta.-ureidoethyl ether

To 0.0209 mol (5 g) of (2-acetylamino 4-nitro) phenyl, .beta.-amino ethyl ether in 15 cm.sup.3 of water and 2.5 cm.sup.3 of HCl is added all at once 0.23 mol (1.86 g) of potassium cyanate in solution in 6 cm.sup.3 of water.

It is agitated for 3 hours at 40.degree. C., then kept at room temperature for three days.

After filtration, washing first with 1 N HCl then with water, the expected product results, melting at 230.degree.-231.degree. C.

Second step: Preparation of (2-amino 4-nitro)phenyl,.beta.-ureidoethyl ether

0.007 mol (2 g) of (2-acetylamino 4-nitro) phenyl, .beta.-ureidoethyl ether is heated in 15 cm.sup.3 of 1 N HCl for 1 hour and 15 min. After cooling, the reactive mixture is diluted with 15 g of ice and neutralized with NH.sub.4 OH.

After filtration, washing with H.sub.2 O and drying in a vacuum on P.sub.2 O.sub.5, the expected product melts at 208.degree. C.

Third step: Preparation of dichlorhydrate of (2,4-diamino)phenyl .beta.-ureidoethyl ether

0.00585 mol (1.35 g) of (2-amino 4-nitro) phenyl, .beta.-ureido-ethyl ether in 5 cm.sup.3 of absolute alcohol is reduced on Pd/C at 10% in a bomb under 50 bars of hydrogen pressure for one hour at 60.degree.-70.degree. C. After cooling, it is filtered on hydrochloric ethanol. The expected dichlorhydrate precipitates. After filtration and drying, it melts with decomposition at 175.degree. C.

Theoretical mass calculated for C.sub.9 H.sub.14 N.sub.4 O.sub.2, 2HCl: 283

Molecular mass found by potentiometric titration in H.sub.2 O by NaOH N/10: 288.

EXAMPLE 8

The following dyeing composition is prepared:

______________________________________Compound of example 2 0.127 g4-amino-N-ethyl-N-carbamylmethyl aniline 0.193 g2-butoxy ethanol 20 gLauric alcohol oxyethylenated with 10.5 mols ofethylene oxide. 8 gAmmonia at 22.degree. B 4.5 gWater, q.s. 100 g______________________________________

The pH is 10.3.

At the moment of use one adds 35 g of hydrogen peroxide at 20 volumes. This mixture applied to 95% naturally white hair for 20 minutes at ambient temperature imparts thereto, after rinsing and shampooing, a sky blue coloration.

EXAMPLE 9

The following dyeing composition is prepared:

______________________________________Compound of example 2 0.255 gDihydrochloride of 4-amino-N-methyl aniline 0.195 gOleic alcohol oxyethylenated with 2 mols ofethylene oxide 3 gOleic alcohol oxyethylenated with 4 mols ofethylene oxide 4.4 gAmmonia at 22.degree. B 6 gWater, q.s. 100 g______________________________________

The pH is equal to 10.

At the moment of use 25 of hydrogen peroxide at 20 volumes are added.

This mixture applied for 10 minutes at 30.degree. C. to 95% naturally white hair imparts thereto, after rinsing and shampooing, a royal blue coloration.

EXAMPLE 10

The following dyeing composition is prepared:

______________________________________Compound of example 2 0.12 gTrihydroxy 1,2,4 benzene 0.82 gN-ethyl-4-amino-N-carbamylmethyl aniline 2.6 g3-nitro-4-N-amino-.beta.-hydroxyethyl phenol 0.29 gEthanol at 96% 20 gTriethanolamine 6 gWater, q.s. 100 g______________________________________

The pH is equal to 9.

At the moment of use 60 g of hydrogen peroxide at 20 volumes are added.

This mixture applied to bleached hair for 20 minutes at 20.degree. C. imparts thereto, after rinsing and shampooing, a deep brown coloration having light violet glints.

EXAMPLE 11

The following dyeing composition is prepared:

______________________________________Compound of example 2 0.2 gDihydrochloride of 2-methyl-5-methoxyparaphenylenediamine 0.2 g4-amino-N,N-.beta.-hydroxyethyl aniline sulfate 0.2 gMetaaminophenol 0.3 g6-hydroxy benzomorpholine 0.1 g3-nitro-4-amino-N-.beta.-hydroxyethyl anisole 0.2 g4-amino-N-methyl phenol sulfate 0.4 gMonomethyl ether of diethyleneglycol 9 gAmmonia at 22.degree. B 10 gWater, q.s. 100 g______________________________________

The pH is equal to 10.7.

At the moment of use 100 g of hydrogen peroxide at 20 volumes are added.

This mixture applied for 30 minutes at 20.degree. C. to bleached hair imparts thereto, after rinsing and shampooing, a very deep reddish chestnut coloration.

EXAMPLE 12

The following dyeing composition is prepared:

______________________________________Compound of example 2 0.13 g3-fluoro-4-amino-N-hydroxyethyl aniline sulfate 0.22 gTrihydrochloride of 4-amino-N-diethyl-2,6-diaminophenol 0.12 gN[(4-hydroxy )phenyl]-2-methyl-5-aminobenzoquinone imine 0.70 g2-butoxy ethanol 5 gLauric alcohol oxyethylenated with 10.5 mols ofethylene oxide 5 gTriethanolamine 1.1 gWater, q.s. 100 g______________________________________

The pH is equal to 9.

At the moment of use, 10 g of urea peroxide are added in 100 g of water.

This mixture applied for 25 minutes at 20.degree. C. to bleached hair imparts thereto, after rinsing and shampooing, a burnt beige grey coloration.

EXAMPLE 13

The following dyeing composition is prepared:

______________________________________Compound of example 1 0.14 gDihydrochloride of 2,6-dimethyl-3-methoxyparaphenylenediamine 0.20 gTrihydrochloride of 4-amino-N-diethyl-2,6-diaminophenol 0.1 gN[(4-hydroxy)phenyl]2-methyl-5-aminobenzoquinone imine 0.5 g2-butoxy ethanol 5 gLauric alcohol oxyethylenated with 10.5 molsof ethylene oxide 5 gTriethanolamine 1.1 gWater, q.s. 100 g______________________________________

The pH is equal to 8.

10 g of urea peroxide in solution in 100 g of water are added at the moment of use.

This solution applied for 20 minutes at ambient temperature to bleached hair imparts thereto, after rinsing and shampooing, a deep grey coloration.

EXAMPLE 14

The following dyeing composition is prepared:

______________________________________Compound of example 1 0.20 gParaaminophenol 0.60 g4-amino-N-.beta.-methoxyethyl aniline sulfate 0.325 gMetaaminophenol 0.44 g(3-nitro-4-amino) phenoxyethanol 0.25 g2-butoxy ethanol 20 gDiethanolamides of fatty acids of copra 7.4 gAmmonia at 22.degree. B 6 gWater, q.s. 100 g______________________________________

The pH is equal to 10.5.

At the moment of use 100 g of hydrogen peroxide at 20 volumes are added. This dyeing composition applied for 20 minutes at 25.degree. C. to 95% naturally white hair imparts thereto, after rinsing and shampooing, a golden chestnut coloration.

EXAMPLE 15

The following dyeing composition is prepared:

______________________________________Compound of example 2 0.00125 g4-amino-N-.beta.-methoxyethyl aniline sulfate 0.00125 g2-butoxy ethanol 7.5 gProduct sold under the commercial name of"Carbopol 934"which is apolymer of acrylic acid (M.W. = 2-3 million)manufactured by the Goodrich Chemical Co. 3.37 gAmmonia to 22.degree. B 7.5 gWater, q.s. 100 g______________________________________

The pH is equal to 8.

At the moment of use, 15 g of hydrogen peroxide at 20 volumes are added. This composition applied for 30 minutes at 25.degree. C. to bleached hair imparts thereto, after rinsing and shampooing, a clear blue coloration.

EXAMPLE 16

The following dyeing composition is prepared:

______________________________________Compound of example 5 0.637 gParaphenylenediamine 0.270 gSodium laurylsulfate oxyethylenated with 2 mols ofethylene oxide 20 gTetraacetic ethylenediamine acid 0.2 gAqueous solution of sodium bisulfite d = 1.32 1 g20% ammonia 10 gWater q.s.p. 100 g______________________________________

The pH equals 10.5.

At the time of use, 100 g of hydrogen peroxide at 20 volumes are added. This mixture applied for 20 minutes at 25.degree. C. to naturally white hair at 90% gives it, after rinsing and shampooing, a marine blue color with purple highlights.

EXAMPLE 17

The following dyeing composition is prepared:

______________________________________Compound of example 5 0.637 gParaminophenol 0.272 gSodium laurylsulfate oxyethylenated with 2 mols ofethylene oxide 20 gTetraacetic ethylenediamine acid 0.2 gAqueous solution of sodium bisulfite d = 1.32 1 g20% ammonia 10 gWater q.s.p. 100 g______________________________________

The pH equals 10.5.

At the time of use, 100 g or H.sub.2 O.sub.2 at 20 volumes are added. This mixture applied for 20 minutes at 25.degree. C. to naturally white hair at 90% gives it, after rinsing and shampooing, a dark red, slightly purple, color.

EXAMPLE 18

The following dyeing composition is prepared:

______________________________________Compound of example 6 0.706 gParatoluylene diamine dichlorhydrate 0.487 g2-Butoxy ethanol 5 gLauric alcohol oxyethylenated with 10.5 mols of ethyleneoxide 5 gAmmonia (22.degree. Baume) 10 gWater q.s.p. 100 g______________________________________

The pH equals 10.3.

At the time of use, 100 g of hydrogen peroxide at 20 volumes is added. This mixture applied for 20 minutes at 20.degree. C. to naturally white hair to 90% gives it, after rinsing and shampooing, a nice clear blue color.

EXAMPLE 19

The following dyeing mixture is prepared:

______________________________________Compound of example 3 0.427 gParaphenylenediamine 0.270 g2-butoxy ethanol 5 gLauric alcohol oxyethylenated with 10.5 mols of ethyleneoxide 5 gAmmonia (22.degree. Baume) 10 gWater q.s.p. 100 g______________________________________

The pH equals 10.3.

At the time of use, 100 g of H.sub.2 O.sub.2 at 20 volumes are added. This mixture applied for 25 minutes at 20.degree. C. to naturally white hair at 90% gives it, after rinsing and shampooing, a deep violet blue color.

EXAMPLE 20

The following dyeing mixture is prepared:

______________________________________Compound of example 3 0.712 gParaphenylene diamine 0.270 gSodium laurylsulfate oxyethylenated with 2 mols ofethylene oxide 20 gTetraacetic ethylenediamine acid 0.2 gAqueous solution of sodium bisulfite d = 1.32 1 gAmmonia (22.degree. Baume) 10 gWater q.s.p. 100 g______________________________________

The pH equals 10.4.

At the time of use, 100 g of hydrogen peroxide at 20 volumes are added. This mixture applied for 20 minutes at 20.degree. C. to naturally white hair at 90% gives it, after rinsing and shampooing, a purplish blue-grey color.

EXAMPLE 21

The following dyeing composition is prepared:

______________________________________Compound of example 7 0.340 gParatoluylenediamine dichlorhydrate 0.487 gSodium laurylsulfate oxyethylenated with 2 mols ofethylene oxide 20 gTetraacetic ethylenediamine acid 0.2 gAqueous solution of sodium bisulfite d = 1.32 1 gAmmonia at 20% 10 gWater q.s.p. 100 g______________________________________

The pH equals 10.4.

At the time of use, 100 g of H.sub.2 O.sub.2 at 20 volumes are added. The mixture applied for 25 minutes at 20.degree. C. to white hair at 90% gives it after rinsing and shampooing a steel blue-grey color.

EXAMPLE 22

The following dyeing composition is prepared:

______________________________________Compound of example 4 0.78 gParaphenylenediamine 0.27 gSodium laurylsulfate oxyethylenated with 2 mols ofethylene oxide 20 gEthylene-diamine-tetraacetic acid 0.2 gAqueous solution of sodium bisulfite (d = 1.32) 1 gAmmonia (at 20%) 10 gWater q.s.p. 100 g______________________________________

The pH of the composition equals 10.3.

At the time of use 100 g of hydrogen peroxide at 20 volumes are added.

This mixture, applied for 20 min. at room temperature to 90% naturally white hair gives it, after rinsing and shampooing, a blue violet coloration.

EXAMPLE 23

The following dyeing composition is prepared:

______________________________________Compound of example 4 0.78 gParaaminophenol 0.272 gSodium laurylsulfate oxyethylenated with two mols ofethylene oxide 20 gEthylene-diamine-tetraacetic acid 0.2 gAqueous solution of sodium bisulfite (d = 1.32) 1 gAmmonia (at 20%) 10 gWater q.s.p. 100 g______________________________________

The pH of the composition is equal to 10.3.

At the time of use, 100 g of hydrogen peroxide at 20 volumes are added.

This mixture, applied for 20 min. at room temperature to 90% naturally white hair gives it, after rinsing and shampooing, a rose coloration with violet highlights.

Claims

1. A compound having the formula ##STR12## or an acid salt thereof, wherein R is hydrogen, C.sub.1 -C.sub.3 alkyl or C.sub.1 -C.sub.3 hydroxyalkyl, and Z is hydroxyalkyl wherein the alkyl moiety has 2 or 3 carbon atoms or alkoxyalkyl wherein the alkoxy moiety contains 1 to 2 carbon atoms and the alkyl moiety has 2 or 3 carbon atoms, with the proviso that Z is not hydroxyethyl when R is hydrogen.

2. A compound according to claim 1 in which Z is hydroxyalkyl.

3. A compound according to claim 1 in which R is methyl and Z is hydroxyethyl.

4. A compound according to claim 1 in which R and Z are hydroxyethyl.

5. A compound according to claim 1 in which R is hydrogen and Z is hydroxypropyl.

6. A compound according to claim 1 in which Z is alkoxyalkyl.

7. A compound according to claim 1 in which R is hydrogen and Z is methoxyethyl.