Phenylpyrido [1,2-a] indolium-derived thiol/disulfide dye, dye composition comprising this dye, process for lightening keratin materials using this dye

A fluorescent dye chosen from dyes of formula (I):

• organic acid salts, mineral acid salts, optical isomers, geometric isomers, and solvates thereof,
• wherein, in formula (I):
• m is 0 or 1;
• n is 1 or 2;
• p is chosen from integers ranging from 0 to 4 inclusive;
• R1, which may be identical or different, are each chosen from halogens, optionally substituted (C1-C6)alkyl groups, (C1-C6)alkoxy groups, (C1-C6) alkylthio groups, (di)(C1-C6) (alkyl)amino groups, (C1-C6)polyhaloalkyl groups, hydroxyl groups, (C1-C6)polyhydroxyalkyl groups, polyhydroxy (C1-C6)alkoxy groups, nitro groups, cyano groups, R-G-C(G′)- groups, R—C(G′)-G- groups, R′S(O)2—N(R)— groups, and RR′N—S(O)2— groups,
• with G and G′, independently of one another, each chosen from oxygen, sulfur,
• R and R′, independently of one another, each chosen from hydrogen and (C1-C6)alkyl groups;
• R2 and R3, independently of one another, are each chosen from optionally substituted (C1-C6)alkyl groups;
• B is chosen from optionally substituted aryl groups and optionally substituted heteroaryl groups;
• L is chosen from divalent C1-C20 hydrocarbon-based chains which are optionally substituted, optionally interrupted, and/or optionally terminated at one end with at least one group chosen from:
• i) divalent groups chosen from:
• —N(Ra)—;
• —N+(Ra)(Rb)-An−;
• —O—;
• —S—;
• —CO—, and —SO2—,
• with Ra and Rb, independently of one another, each chosen from hydrogen, (C1-C6)alkyl groups, hydroxyl (C1-C6)alkyl groups, and (di)(C1-C6) (alkyl)amino (C1-C6)alkyl groups, and
• An− chosen from anionic counterions, and
• ii) cationic heterocyclic and heteroaryl Het+An− groups,
• with An− chosen from anionic counterions, and
• Het+ chosen from saturated and unsaturated heterocycles comprising 5 to 10 members and saturated and unsaturated heteroaryls comprising 5 to 10 members;
• Y is chosen from:
• i) hydrogen;
• ii) alkali metals;
• iii) alkaline earth metals;
• iv) NR+RαRβRγRδAn″− ammonium groups and P+RαRβRγRδAn″−phosphonium groups,
• with Rα, Rβ, Rγ, and Rδ, independently of one another, each chosen from hydrogen and (C1-C4)alkyl groups, and
• An″− chosen from anionic counterions;
• and
• v) thiol-function-protecting groups;
• An− is chosen from anionic counterions;
• and when n is 2, then m is zero, and when n is 1, then m is 1.

A process for dyeing keratin materials, in which a suitable dye composition comprising at least one fluorescent dye chosen from dyes of formula (I):

• organic acid salts, mineral acid salts, optical isomers, geometric isomers, and solvates thereof,
• wherein, in formula (I):
• m is 0 or 1;
• n is 1 or 2;
• p is chosen from integers ranging from 0 to 4 inclusive;
• R1, which may be identical or different, are each chosen from halogens, optionally substituted (C1-C6)alkyl groups, (C1-C6)alkoxy groups, (C1-C6) alkylthio groups, (di)(C1-C6) (alkyl)amino groups, (C1-C6)polyhaloalkyl groups, hydroxyl groups, (C1-C6)polyhydroxyalkyl groups, polyhydroxy (C1-C6)alkoxy groups, nitro groups, cyano groups, R-G-C(G′)- groups, R—C(G′)-G- groups, R′S(O)2—N(R)— groups, and RR′N—S(O)2— groups,
• with G and G′, independently of one another, each chosen from oxygen, sulfur, and groups NR', and
• R and R′, independently of one another, each chosen from hydrogen and (C1-C6)alkyl groups;
• R2 and R3, independently of one another, are each chosen from optionally substituted (C1-C6)alkyl groups;
• B is chosen from optionally substituted aryl groups and optionally substituted heteroaryl groups;
• L is chosen from divalent C1-C20 hydrocarbon-based chains which are optionally substituted, optionally interrupted, and/or optionally terminated at one end with at least one group chosen from:
• i) divalent groups chosen from:
• —N(Ra)—;
• —N+(Ra)(Rb)— An−;
• —O—;
• —S—;
• —CO—, and —SO2—,
• with Ra and Rb, independently of one another, each chosen from hydrogen, (C1-C6)alkyl groups, hydroxyl (C1-C6)alkyl groups, and (di)(C1-C6) (alkyl)amino (C1-C6)alkyl groups, and
• An− chosen from anionic counterions, and
• ii) cationic heterocyclic and heteroaryl Het+An− groups,
• with An− chosen from anionic counterions, and
• Het+ chosen from saturated and unsaturated heterocycles comprising 5 to 10 members and saturated and unsaturated heteroaryls comprising 5 to 10 members;
• Y is chosen from:
• i) hydrogen;
• ii) alkali metals;
• iii) alkaline earth metals;
• iv) NR+RαRβRγRδAn″− ammonium groups and P+RαRβRγRδAn″− phosphonium groups,
• with Rα, Rβ, Rγ, and Rδ, independently of one another, each chosen from hydrogen and (C1-C4)alkyl groups, and
• An″− chosen from anionic counterions;
• and
• v) thiol-function-protecting groups;
• and
• An− is chosen from anionic counterions;
• and when n is 2, then m is zero, and when n is 1, then m is 1,
• is applied to the materials.

A multicompartment device in which a first compartment contains a dye composition comprising at least one fluorescent dye of chosen from dyes of formula (I):

• organic acid salts, mineral acid salts, optical isomers, geometric isomers, and solvates thereof,
• wherein, in formula (I):
• m is 0 or 1;
• n is 1 or 2;
• p is chosen from integers ranging from 0 to 4 inclusive;
• R1, which may be identical or different, are each chosen from halogens, optionally substituted (C1-C6)alkyl groups, (C1-C6)alkoxy groups, (C1-C6) alkylthio groups, (di)(C1-C6) (alkyl)amino groups, (C1-C6)polyhaloalkyl groups, hydroxyl groups, (C1-C6)polyhydroxyalkyl groups, polyhydroxy (C1-C6)alkoxy groups, nitro groups, cyano groups, R-G-C(G′)- groups, R—C(G′)-G- groups, R′S(O)2—N(R)— groups, and RR′N—S(O)2— groups,
• with G and G′, independently of one another, each chosen from oxygen, sulfur, and groups NR', and
• R and R′, independently of one another, each chosen from hydrogen and (C1-C6)alkyl groups;
• R2 and R3, independently of one another, are each chosen from optionally substituted (C1-C6)alkyl groups;
• B is chosen from optionally substituted aryl groups and optionally substituted heteroaryl groups;
• L is chosen from divalent C1-C20 hydrocarbon-based chains which are optionally substituted, optionally interrupted, and/or optionally terminated at one end with at least one group chosen from:
• i) divalent groups chosen from:
• —N(Ra)—;
• —N+(Ra)(Rb)— An−;
• —O—;
• —S—;
• —CO—, and —SO2—,
• with Ra and Rb, independently of one another, each chosen from hydrogen, (C1-C6)alkyl groups, hydroxyl (C1-C6)alkyl groups, and (di)(C1-C6) (alkyl)amino (C1-C6)alkyl groups, and
• An− chosen from anionic counterions, and
• ii) cationic heterocyclic and heteroaryl Het+An− groups,
• with An− chosen from anionic counterions, and
• Het+ chosen from saturated and unsaturated heterocycles comprising 5 to 10 members and saturated and unsaturated heteroaryls comprising 5 to 10 members;
• Y is chosen from:
• i) hydrogen;
• ii) alkali metals;
• iii) alkaline earth metals;
• iv) NR+RαRβRγRδAn″− ammonium groups and P+RαRβRγRδAn″− phosphonium groups,
• with Rα, Rβ, Rγ, and Rδ, independently of one another, each chosen from hydrogen and (C1-C4)alkyl groups, and
• An″− chosen from anionic counterions;
• and
• v) thiol-function-protecting groups;
• and
• An− is chosen from anionic counterions;
• and when n is 2, then m is zero, and when n is 1, then m is 1.