Photoactivatable diazirine-active agent compounds, compositions comprising them and uses thereof

1. A cosmetic composition comprising,

at least one cosmetically acceptable solvent, and

at least one photoactivatable diazirine-active compound of a diazirine covalently bonded to a cosmetic active agent, wherein the cosmetic active agent is chosen from sunscreens, mineral particles, polystyrenes, polyethylene oxide polymers, and polypropylene oxide polymers, and dyes, and

wherein the diazirine is chosen from diazirines of formula (l):

wherein:

—R 1 is chosen from a hydrogen atom, linear and branched C 1 to C 10 alkyl radicals, linear and branched C 2 to C 10 alkenyl radicals, linear and branched C 2 to C 10 alkynyl radicals, CF 3 , CCl 3 , CBr 3 , N(R′) 3 +, S(R′) 2 +, SH 2 +, NH 3 +, NO 2 , SO 2 R′, C≡N, COOH, F, Cl, Br, l, OR′, COOR′, SO 3 H, COR′, SH, SR′ and OH radicals, wherein R′ is chosen from C 1 to C 10 alkyl radicals;

—Z is chosen from a single bond and a spacer group, wherein the spacer group is a carbon-based chain chosen from linear, branched and cyclic, saturated and unsaturated C 1 -C 100 carbon-based chains, wherein said carbon-based chain may be interrupted with at least one hetero atom chosen from sulphur, oxygen, nitrogen, silicon, anphosphorous atoms and may also comprise at least one substituent chosen from hydroxl, amine, thiol, carbamate, ether, acid, ester, amide, cyano, and ureido groups;

—Y is an N-hydroxysuccinimide ester; and

—Ar is an aromatic nucleus

wherein:

—R 2 , R 3 , R 4 and R 5 , which may be identical or different, are each chosen from a hydrogen atom, linear and branched C 1 to C 10 alkyl radicals, linear and branched C 2 to C 10 alkenyl radicals, linear and branched C 2 to C 10 alkynyl radicals, CF 3 , CCl 3 , CBr 3 , N(R′) 3 +, S(R′) 2 +, SH 2 +, NH 3 +, NO 2 , SO 2 R′, C≡N, COOH, F, Cl, Br, l, OR′, COOR′, COR′, SH, SR′, OH and SO 3 H radicals, wherein R′ is chosen from C 1 to C 10 alkyl radicals.

2. The cosmetic composition according to claim 1 , wherein, in the definition of Z, the spacer group is a carbon-based chain chosen from linear, branched and cyclic, saturated and unsaturated C 1 -C 50 carbon-based chains.

3. The cosmetic composition according to claim 1 , wherein, in the definition of Z, the spacer group is chosen from polyols and polyalkylene glycols.

4. The cosmetic composition according to claim 3 , wherein the spacer group is chosen from polyethylene glycol and polypropylene glycol.

5. The cosmetic composition according to claim 1 , wherein the cosmetic active agent is a dye chosen from nitrobenzene dyes, aromatic dyes, aminobenzene dyes, azo dyes, anthraquinone dyes, aromatic diamines, aminophenols, phenols, naphthols, porphyrines, tetraphenylporphyrines, metalloporphyrines, phthalocyanins, carotenoids, flavonoids, and fluorescent molecules.

6. The cosmetic composition according to claim 1 , wherein the functional group Y forms a covalent bond with the cosmetic active agent.

7. The cosmetic composition according to claim 1 , wherein the at least one diazirine-active compound is present in an amount ranging from 0.001% to 90% by weight, relative to the total weight of the composition.

8. The cosmetic composition according to claim 7 , wherein the at least one diazirine-active compound is present in an amount ranging from 0.01% to 50% by weight, relative to the total weight of the composition.

9. The cosmetic composition according to claim 8 , wherein the at least one diazirine-active compound is present in an amount ranging from 0.1% to 10% by weight, relative to the total weight of the composition.

10. The cosmetic composition according to claim 1 , further comprising at least one other cosmetic agent that is not bonded to the diazirine chosen from polymers, mineral particles, organic particles, sunscreens, dyes, fatty substances, softeners, antioxidants, free-radical scavengers, emollients, α-hydroxy acids, moisturizers, vitamins, insect repellents, fragrances, anti-inflammatory agents, substance P antagonists, and fillers.

11. The cosmetic composition according to claim 1 , further comprising at least one activator chosen from polyamines.

12. A process for cosmetically treating a keratin material, comprising applying to the keratin material a cosmetic composition comprising,

at least one cosmetically acceptable solvent, and

at least one photoactivatable diazirine-active compound which comprises a diazirine covalently bonded to a cosmetic active agent, wherein the cosmetic agent is chosen from sunscreens, mineral particles, polystyrenes, polyethylene oxide/polypropylene oxide polymers, and dyes, and

wherein the diazirine is chosen from diazirines of formula (l):

wherein:

—R 1 is chosen from a hydrogen atom, linear and branched C 1 to C 10 alkyl radicals, linear and branched C 2 to C 10 alkenyl radicals, linear and branched C 2 to C 10 alkynyl radicals, CF 3 , CCl 3 , CBr 3 , N(R′) 3 +, S(R′) 2 +, SH 2 +, NH 3 +, NO 2 , SO 2 R′, C≡N, COOH, F, Cl, Br, l, OR′, COOR′, SO 3 H, COR′, SH, SR′ and OH radicals, wherein R′ is chosen from C 1 to C 10 alkyl radicals;

—Z is chosen from a single bond and a spacer group, wherein the spacer group is a carbon-based chain chosen from linear, branched and cyclic, saturated and unsaturated C 1 -C 100 carbon-based chains, wherein said carbon-based chain may be interrupted with at least one hetero atom and may also comprise at least one substituent;

—Y is an N-hydroxysuccinimide ester; and

—Ar is an aromatic nucleus

wherein:

—R 2 , R 3 , R 4 and R 5 , which may be identical or different, are each chosen from a hydrogen atom, linear and branched C 1 to C 10 alkyl radicals, linear and branched C 2 to C 10 alkenyl radicals, linear and branched C 2 to C 10 alkynyl radicals, CF 3 , CCl 3 , CBr 3 , N(R′) 3 +, S(R′) 2 +, SH 2 +, NH 3 +, NO 2 , SO 2 R′, C≡N, COOH, F, Cl, Br, l, OR′, COOR′, COR′, SH, SR′, OH and SO 3 H radicals, wherein R′ is chosen from C 1 to C 10 alkyl radicals.