Method for depigmenting keratin materials using resorcinol derivatives

A compound of formula (I):

• wherein:
• R1 is a hydrogen atom or an acetyl group;
• and
• A is a radical selected from the group consisting of:
• a) H;
• b) a C3-C8 cyclic, a C3-C20 branched, a C2-C20 unsaturated, or a C1-C20 saturated linear alkyl group, which is optionally interrupted by one or more heteroatoms or moieties selected from the group consisting of N, O, —CO—, and a combination thereof and is optionally substituted by one or more groups independently selected from the group consisting of:
• i) —OR5,
• ii) —SR5,
• iii) —NR6R7,
• iv) —CONHR6,
• v) —CONR6R7,
• vi) —COOR6,
• vii) —NHCONHR6,
• viii) a —C(O)C1-C4 alkyl group,
• ix) a C5-C12 (hetero)aryl group optionally comprising one or more heteroatoms selected from the group consisting of O, N and S and optionally substituted by one or more hydroxyls or one or more C1-C8 alkoxy radicals, and
• x) a saturated or an unsaturated, non-aromatic heterocycle comprising from 5 to 8 members and one or more heteroatoms selected from the group consisting of O, N and S and optionally substituted by one or more hydroxyls or one or more C1-C8 alkoxy or C1-C4 alkyl radicals, wherein one of the 5 to 8 members is optionally a carbonyl group;
• c) a C5-C12 (hetero)aryl group optionally comprising one or more heteroatoms selected from the group consisting of O, N and S and optionally substituted by one or more hydroxyls or one or more radicals selected from the group consisting of a C1-C8 alkoxy group and a C1-C8 alkyl group;
• d) —NR2R3;
• e) —OR4;
• f) —C(O)NHR4;
• g) a C(O)C1-C10 alkyl group;
• and
• h) a radical of formula (II):
• wherein:
• R2 and R3 are each independently a radical selected from the group consisting of:
• H;
• a C3-C8 cyclic, a C3-C10 branched, a C2-C10 unsaturated, or a C1-C10 linear saturated alkyl group, which is optionally interrupted by one or more heteroatoms or moieties selected from the group consisting of N, O, —CO—, and a combination thereof and is optionally substituted by —OR5;
• and
• a C5-C12 (hetero)aryl group optionally comprising one or more heteroatoms selected from the group consisting of O, N and S and optionally substituted by one or more hydroxyls or one or more C1-C8 alkoxy radicals;
• R2 and R3 optionally form, with a nitrogen, a heterocycle which comprises from 5 to 8 members, optionally comprises one or more heteroatoms or moieties selected from the group consisting of N, O and —CO—, and is optionally substituted by a C1-C10 hydrocarbon chain which optionally comprises one or more radicals selected from the group consisting of a hydroxyl group and a C1-C4 alkoxy group;
• R4 is a radical selected from the group consisting of:
• H;
• a C3-C8 cyclic, a C3-C10 branched, or a C1-C10 linear saturated alkyl group, which is optionally substituted by one or more groups independently selected from the group consisting of:
• —COOR6, and a C5-C12 (hetero)aryl radical which optionally comprises one or more heteroatoms selected from the group consisting of O, N and S and is optionally substituted by one or more hydroxyls or one or more C1-C8 alkoxy radicals;
• and
• a C5-C12 (hetero)aryl group which optionally comprises one or more heteroatoms selected from the group consisting of O, N and S and is optionally substituted by one or more hydroxyls or one or more C1-C8 alkoxy radicals;
• R5 is selected from the group consisting of H and a C3-C8 cyclic, a C2-C10 unsaturated, a C3-C10 branched, or a C1-C10 linear saturated alkyl hydrocarbon group;
• R6 and R7 are each independently selected from the group consisting of:
• H;
• a C3-C8 cyclic, a C2-C10 unsaturated, a C3-C10 branched, or a C1-C10 linear saturated alkyl hydrocarbon group;
• and
• a (C1-C4)alkyl-C6 (hetero)aryl group optionally comprising a nitrogen atom;
• R6 and R7 optionally form, with a nitrogen, a heterocycle which comprises from 5 to 8 members, optionally comprises one or more heteroatoms or moieties selected from the group consisting of N, O and —CO—, and is optionally substituted by a C1-C10 hydrocarbon chain;
• and
• X is
• a C3-C8 cyclic, a C3-C10 branched, or a C1-C10 linear saturated hydrocarbon chain;
• a C6-C12 arylene group;
• a C1-C4 alkylene-C6-C8 cycloalkylene-C1-C4 alkylene group;
• or
• a C1-C4 alkylene-phenylene-C1-C4 alkylene group, which is optionally substituted by one or more radicals independently selected from the group consisting of —OH and —COOR8, wherein R8 is H, a C3-C8 cyclic, a C2-C10 unsaturated, a C3-C10 branched, or a C1-C20 linear saturated alkyl hydrocarbon group.