Coupler for use in oxidative hair dyeing

Details Coupler for use in oxidative hair dyeing Coupler for use in oxidative hair dyeing

2000-12-14

2002-06-25

Douyon, Lorna M. (Department: 1751)

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Hair dyeing

C008S408000, C008S409000, C008S412000, C008S421000, C585S446000, C564S305000, C564S396000

Reexamination Certificate

active

06409773

ABSTRACT:

FIELD IF THE INVENTION
This invention relates to novel couplers for use in hair coloring compositions comprising one or more oxidative hair coloring agents in combination with one or more oxidizing agents. The invention also relates to hair coloring compositions of these novel couplers and to coloring or dyeing of hair using compositions containing these couplers.
BACKGROUND OF THE INVENTION
Coloration of hair is a procedure practiced from antiquity employing a variety of means. In modem times, the most extensively used method employed to color hair is to color hair by an oxidative dyeing process employing hair coloring systems utilizing one or more oxidative hair coloring agents in combination with one or more oxidizing agents.
Most commonly a peroxy oxidizing agent is used in combination with one or more oxidative hair coloring agents, generally small molecules capable of diffusing into hair and comprising one or more primary intermediates and one or more couplers. In this procedure, a peroxide material, such as hydrogen peroxide, is employed to activate the small molecules of primary intermediates so that they react with couplers to form larger sized compounds in the hair shaft to color the hair in a variety of shades and colors.
A wide variety of primary intermediates and couplers have been employed in such oxidative hair coloring systems and compositions. Among the primary intermediates employed there may be mentioned p-phenylenediamine, p-toluenediamine, p-aminophenol, 4-amino-3-methylphenol, and as couplers there may be mentioned resorcinol, 2-methylresorcinol, 3-aminophenol, and 5-amino-2-methyl-phenol. A majority of the shades have been produced with dyes based on p-phenylenediamine.
For providing an orange coloration to hair 2-methyl-5-aminophenol has been extensively used in combination with p-aminophenol as a primary intermediate. However, the resulting orange color on hair undergoes significant changes on exposure to light or shampooing. U.S. Pat. No. 4,065,255 and EP patent publications EP 634165 A1 and EP 667143 A1 suggest the use of 5-hydroxyethylamino-2-methyl-phenol, 5-alkylamino-2-methyl-phenol and 5-amino-2-methyl-phenol as couplers. Therefore, there is a need for new orange couplers for use in oxidative hair dyeing compositions and systems.
BRIEF SUMMARY OF THE INVENTION
This invention provides novel orange couplers of the formula (1):
wherein R is selected from C
1
to C
2
alkyl and hydroxyethyl, R
1
and R
2
are each independently selected from a C
1
to C
5
alkyl, C
1
to C
3
alkoxy , C
1
to C
5
hydroxyalkyl, C
1
to C
5
hydroxyalkoxy, C
3
to C
6
cycloalkyl, or R
1
and R
2
together with the carbon atom to which they are attached form a C
3
to C
6
cycloalkyl group. These novel couplers are used to provide coloration to hair in which there is good dye uptake by the hair and provides shades or colors which are stable over a relatively long period of time. The novel couplers provide for dyeing of hair that provides color or shades that possess good wash fastness and do not undergo the significant changes on exposure to light or shampooing as experienced with 5-amino-2-methyl-phenol.
DETAILED DESCRIPTION OF THE INVENTION
Preferred coupler compounds of this invention are those of formula (1):
wherein R is a methyl group, and R
1
and R
2
are as defined hereinbefore.
Especially preferred couplers of this invention are the following compounds:
5-isopropylamino-2-methyl-phenol,
5-(1-cyclopropyl-ethylamino) 2-methyl-phenol,
5-cyclobutylamino-2-methyl-phenol,
5-cyclopentylamino-2-methyl-phenol,
5-cyclohexylamino-2-methyl-phenol,
5-(2-methoxy-1-methyl-ethylamino)-2-methyl-phenol,
5-(1,2-dimethyl-propylamino)-2-methyl-phenol,
5-(1-ethyl-propylamino)-2-methyl-phenol,
2-methyl-5-(1-methyl-butylamino)-phenol, and
5-sec-butylamino-2-methyl-phenol.
The novel coupler compounds of formula (1) of this invention are readily prepared by a reaction of an aminophenol of formula (2) with an appropriate ketone of formula (3) in the presence of a suitable reducing agent, such as sodium triacetoxyborohydride or sodium borohydride, according to the following reaction sequence:
wherein R, R
1
and R
2
are as defined hereinbefore and R is preferably a methyl group, R
1
and R
2
are preferably C
1
to C
5
alkyl, C
3
to C
6
cycloalkyl or together with the carbon atom to which they are joined form a C
3
to C
6
cycloalkyl group.
A sample synthesis procedure is as follows. A ketone (3) (0.3 mmole) is treated with an excess of an aminophenol compound (2) (44.3 mg, 1.2 equiv. based on R being methyl) in 1% AcOH-DCE (dichloroethane) (4 mL). The mixture is agitated in a reaction vessel for about 1 hr at room temperature and then sodium triacetoxyborohydride (127 mg, 0.6 mmole) is added. The mixture is agitated for about 18 hr and then Argonaut PS-MB aldehyde (100 mg, 1.26 mmole/g loading) is added. The mixture is agitated for about 1 hr, filtered and rinsed with anhydrous DCE (2 mL). To the filtrate is added water (2 mL), shaken and water is removed by pipette. The organic layer is filtered through a Chem Elute™ column (Varian, 3 mL sample capacity) and washed with DCE (2×2 mL). The filtrate is evaporated in vacuum to yield the target compound (1). The product is subjected to one or more of analysis by analytical HPLC, identification by MS and characterization by
1
H NMR.
Compounds were prepared according to the foregoing synthesis procedure. The compounds prepared were as follows:
5-isopropylamino-2-methyl-phenol,
5-(1-cyclopropyl-ethylamino)-2-methyl-phenol,
5-cyclobutylamino-2-methyl-phenol,
5-cyclopentylamino-2-methyl-phenol,
5-cyclohexylamino-2-methyl-phenol,
5-(2-methoxy-1-methyl-ethylamino)-2-methyl-phenol,
5-(1,2-dimethyl-propylamino)-2-methyl-phenol,
5-(1-ethyl-propylamino)-2-methyl-phenol,
2-methyl-5-(1-methyl-butylamino)-phenol, and
5-sec-butylamino-2-methyl-phenol.
Hair coloring compositions of this invention can contain the novel couplers of this invention as the sole coupler or can also contain other couplers in combination with primary intermediates.
For hair coloring compositions of this invention, there may be used one or more suitable primary intermediates in combination with the novel couplers of this invention. Suitable primary intermediates include, for example,
Examples of such other suitable primary intermediates include:
p-phenylenediamine derivatives such as: benzene-1,4-diamine (commonly known as p-phenylenediamine), 2-methyl-benzene-1,4-diamine (commonly known as 2-methyl-p-phenylenediamine), 2-chloro-benzene-1,4-diamine, N-phenyl-benzene-1,4-diamine, N-(2-ethoxyethyl)benzene-1,4-diamine, 2-[(4-amino-phenyl)-(2-hydroxy-ethyl)-amino]-ethanol (commonly known as N,N-bis(2-hydroxyethyl)-p-phenylenediamine), (2,5-diamino-phenyl)-methanol, 1-(2,5-diamino-phenyl)-ethanol, 2-(2,5-diamino-phenyl)-ethanol, N-(4-aminophenyl)benzene-1,4-diamine, 2,6-dimethyl-benzene-1,4-diamine, 2-isopropyl-benzene-1,4-diamine, 1-[(4-aminophenyl)amino]-propan-2-ol, 2-propyl-benzene-1,4-diamine, 1,3-bis[(4-aminophenyl)(2-hydroxyethyl)amino]propan-2-ol, N
4
,N
4
,2-trimethylbenzene-1,4-diamine, 2-methoxy-benzene-1,4-diamine, 1-(2,5-diaminophenyl)ethane-1,2-diol, 2,3-dimethyl-benzene-1,4-diamine, N-(4-amino-3-hydroxy-phenyl)-acetamide, 2,6-diethylbenzene-1,4-diamine, 2,5-dimethylbenzene-1,4-diamine, 2-thien-2-ylbenzene-1,4-diamine,2-thien-3-ylbenzene-1,4-diamine, 2-pyridin-3-ylbenzene-1,4-diamine, 1,1′-biphenyl-2,5-diamine, 2-(methoxymethyl)benzene-1,4-diamine, 2-(aminomethyl)benzene-1,4-diamine, 2-(2,5-diaminophenoxy)ethanol, N-[2-(2,5-diaminophenoxy)ethyl]-acetamide, N,N-dimethylbenzene-1,4-diamine, N,N-diethylbenzene-1,4-diamine, N,N-dipropylbenzene-1,4-diamine, 2-[(4-aminophenyl)(ethyl)amino]ethanol, 2-[(4-amino-3-methyl-phenyl)-(2-hydroxy-ethyl)-amino]-ethanol, N-(2-methoxyethyl)-benzene-1,4-diamine, 3-[(4-aminophenyl)amino]propan-1-ol, 3-[(4-aminophenyl)-amino]propane-1,2-diol, N-{4-[(4-aminophenyl)amino]butyl}benzene-1,4-diamine, and 2-[2-(2-{2-&l

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