Abstract: Compositions for dyeing keratin fibers comprise (a) at least one keratin dyeing compound selected from aromatic systems which comprise at least one boronic acid or boronic ester moiety and which are capable of forming upon oxidation a nucleophile or an electrophile, (b) at least one additional keratin dyeing compound selected from the group consisting of auxiliary developers and auxiliary couplers, and (c) a cosmetically suitable medium. Methods for oxidatively dyeing keratin fibers comprise the steps of applying such compositions in the presence of an oxidizing agent and rinsing the hair. A hair coloring product in kit form comprises a first separately packaged container comprising a composition as described above and a second separately packaged container comprising an oxidizing agent.

Abstract: Compositions for dyeing keratin fibers comprise (a) at least one keratin dyeing compound selected from aromatic systems which comprise at least one boronic acid or boronic ester moiety and which are capable of forming upon oxidation a nucleophile or an electrophile, (b) at least one additional keratin dyeing compound selected from the group consisting of auxiliary developers and auxiliary couplers, and (c) a cosmetically suitable medium. Methods for oxidatively dyeing keratin fibers comprise the steps of applying such compositions in the presence of an oxidizing agent and rinsing the hair. A hair coloring product in kit form comprises a first separately packaged container comprising a composition as described above and a second separately packaged container comprising an oxidizing agent.

Abstract: Compositions for dyeing keratin fibers comprise (a) at least one keratin dyeing compound selected from aromatic systems which comprise at least one boronic acid or boronic ester moiety and which are capable of forming upon oxidation a nucleophile or an electrophile, (b) at least one additional keratin dyeing compound selected from the group consisting of auxiliary developers and auxiliary couplers, and (c) a cosmetically suitable medium. Methods for oxidatively dyeing keratin fibers comprise the steps of applying such compositions in the presence of an oxidizing agent and rinsing the hair. A hair coloring product in kit form comprises a first separately packaged container comprising a composition as described above and a second separately packaged container comprising an oxidizing agent.

Abstract: Compositions for dyeing keratin fibers comprise (a) at least one keratin dyeing compound selected from aromatic systems which comprise at least one boronic acid or boronic ester moiety and which are capable of forming upon oxidation a nucleophile or an electrophile, (b) at least one additional keratin dyeing compound selected from the group consisting of auxiliary developers and auxiliary couplers, and (c) a cosmetically suitable medium. Methods for oxidatively dyeing keratin fibers comprise the steps of applying such compositions in the presence of an oxidizing agent and rinsing the hair. A hair coloring product in kit form comprises a first separately packaged container comprising a composition as described above and a second separately packaged container comprising an oxidizing agent.

Abstract: Compositions for the oxidative dyeing of keratin fibers, comprising a medium suitable for dyeing and at least one benzothiazole-4,7-diamine keratin dyeing compound and derivatives thereof. This invention further relates to a method for oxidative dyeing of keratin fibers, comprising applying such compositions in the presence of an oxidizing agent, for a period sufficient to develop the desired coloration.

Abstract: Hair-coloring compositions comprise at least one self-coupling compound of Formula (1) wherein R is a moiety selected from H, C1-3 alkyl and C1-3 hydroxyalkyl; R1 is a C1-3 alkylene radical and R2 is selected from H and C1-3 alkyl radicals.

Abstract: Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): wherein X is selected from halogen and R2SO4; R3 is selected from C1 to C2 alkyl or hydroxyethyl; R2 is selected from C1 to C22 alkyl and C1 to C22 mono and dihydroxyalkyl; and R is selected from of C1 to C16 alkyl, C1 to C10 hydroxyalkyl, C1 to C6 alkoxyalkyl and benzyl.

Abstract: Hair-coloring compositions comprise at least one self-coupling compound of Formula (1) 1

Abstract: Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of formula (1): wherein X is selected from of halogen and R5SO4 R3 is selected from C1 to C2 alkyl and hydroxyethyl; and R, R1, R2 and R5 are each independently selected from C1 to C22 alkyl or C1 to C22 mono or dihydroxyalkyl.

Abstract: Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of formula (1): wherein X is selected from of halogen and R5SO4 R3 is selected from C1 to C2 alkyl and hydroxyethyl; and R, R1, R2 and R5 are each independently selected from C1 to C22 alkyl or C1 to C22 mono or dihydroxyalkyl.

Abstract: Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): wherein X is selected from halogen and R2SO4; R3 is selected from C1 to C2 alkyl or hydroxyethyl; R2 is selected from C1 to C22 alkyl and C1 to C22 mono and dihydroxyalkyl; and R is selected from of C1 to C16 alkyl, C1 to C10 hydroxyalkyl, C1 to C6 alkoxyalkyl and benzyl.

Abstract: Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): 1

Abstract: Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of formula (1): 1

Abstract: Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula at least one coupler comprising a compound of the formula (1): wherein R is selected from of C1 to C2 alkyl and hydroxyethyl, R1 and R2 are each independently selected from the group consisting of C1 to C5 alkyl, C3 to C6 cycloalkyl, C1 to C5 alkoxy, C1 to C5 hydroxyalkyl, C1 to C5 hydroxyalkoxy, or R1 and R2 together with the carbon atom to which they are attached form a C3 to C6 cycloalkyl group.

Abstract: Compositions and methods for the oxidative coloring of human hair, wherein the compositions contain as a novel primary dye intermediate a 1-(4-aminophenyl)-2-pyrrolidinemethanol, or a cosmetically acceptable salt thereof. The compositions may also contain at least one other primary intermediate and conventional coupling compounds, in addition to an oxidizing agent and other components typically used in oxidative hair dye preparations. A preferred dye intermediate in the composition is 1-(4-aminophenyl)-2-pyrrolidinemethanol or cosmetically acceptable salts thereof, which produce intense black colors when used in admixture with a suitable coupling agents, such as 3-aminophenol, in conventional hair dye base formulations.