Composition for dyeing keratin fibers, comprising a sulfonamidoxanthene direct dye, and dyeing process using the same

Composition for dyeing keratin fibers, comprising, in a cosmetic medium that is suitable for dyeing, at least one dye chosen from the compounds corresponding to formula (I) below, mesomers thereof and oligomers thereof:

• in which B represents:
• in which R1 and R′1, which may be identical or different, represent:
• a hydrogen atom,
• an alkyl radical,
• a thioalkyl radical,
• an alkoxy radical,
• an aminoalkyl radical,
• a trialkylammonioalkyl radical,
• a carboxyalkyl radical,
• a carboxyaminoalkyl radical,
• an aminoalkoxypolyalkoxy radical in which the alkoxy radicals of the polyalkoxy group, which may be identical or different, each contain 1 to 4 carbon atoms,
• an alkoxycarbonyl radical,
• an alkoxycarbonylalkyl radical,
• an alkoxyalkyl radical,
• an acyl radical,
• an aryl radical, preferably phenyl,
• an arylalkyl radical, preferably benzyl,
• a saturated or unsaturated 5- to 12-membered and preferably 5- to 7-membered heterocycle with a nitrogen atom, optionally comprising at least one other heteroatom chosen from oxygen, nitrogen and sulfur, said heterocycle being optionally substituted;
• R′1 also possibly representing the following group:
• in which:
• R8 represents a group chosen from those defining R1 and R′1,
• L1 represents a divalent hydrocarbon-based chain comprising from 1 to 16 carbon atoms, optionally interrupted with at least one heteroatom chosen from oxygen, sulfur and nitrogen, and/or with a group comprising at least one heteroatom, such as for instance CO, SO2,
• B′ represents a group of formula (B) and is identical to or different than B;
• the radicals R1 and R′1 optionally form, together with the nitrogen atom to which they are attached, a 5- to 12-membered and preferably 5- to 7-membered heterocycle, which is preferably saturated, optionally comprising another heteroatom, chosen from oxygen, nitrogen and sulfur, said heterocycle being optionally substituted;
• R2 represents a group chosen from a hydrogen atom, halogen atoms such as F, Cl, Br and I, alkoxy radicals, alkyl radicals, a sulfonic radical and a carboxyl radical;
• R3, R4, R5, R6, R7 and R9 each independently represent a group chosen from a hydrogen atom;
• halogen atoms such as F, Cl, Br and I;
• alkoxy radicals;
• alkyl radicals;
• amino groups;
• amino groups mono- or disubstituted with a group chosen from a benzyl group, aryl groups, and alkyl groups, such as monoarylamino, diarylamino, monoalkylamino or (dialkyl)amino groups in which the substituents on the amino group, such as the alkyl radicals, can form together with the nitrogen atom to which they are attached a 5- to 12-membered and preferably 5- to 7-membered heterocycle, which is preferably saturated, optionally comprising at least one other heteroatom chosen from nitrogen, oxygen and sulfur, said heterocycle possibly being optionally substituted;
• or one or both of the substituents on the amino group, such as the alkyl radicals, can form together with a substituent located in an ortho position relative to the mono- or disubstituted amino group such as monoalkylamino or dialkylamino a 5- or 6-membered heterocycle that may also optionally comprise at least one other heteroatom chosen from nitrogen, oxygen and sulfur atoms, said heterocycle possibly being optionally substituted;
• the group(s) —SO2NR1R′1 and/or —L1NR8SO2— being attached either directly to one or more of the rings bearing the substituents R2 to R9 or via one or more of the substituents R2 to R9;
• the coefficient n is an integer ranging from 1 to 4 and is preferably equal to 1;
• the coefficient q is an integer ranging from 1 to 3 and is preferably equal to 1;
• An represents a monovalent or multivalent anion, or a mixture of anions;
• the coefficient p is equal to 0 or 1;
• An and p being such that the compound is electrically neutral.