6,8-disubstituted-9-(heterocyclyl)purines, compositions containing these derivatives and their use in cosmetic and medicinal applications

A compound of general formula I

• wherein
• Cyc is heterocyclyl selected from the group consisting of 2-tetrahydropyranyl and 2-tetrahydrofuranyl;
• R6 is —NH—Ry,
• Ry is selected from the group consisting of:
• C1 to C8 linear or branched alkyl, optionally substituted by at least one substituent selected from the group consisting of hydroxy, halogen, C1 to C4 alkoxy,
• C2 to C8 linear or branched alkenyl, optionally substituted by at least one substituent selected from the group consisting of hydroxy, halogen, C1 to C4 alkoxy,
• C3 to C8 cycloalkyl, optionally substituted by at least one substituent selected from the group consisting of hydroxy, halogen, C1 to C4 alkyl, C1 to C4 alkoxy,
• benzyl, optionally substituted by at least one substituent selected from the group consisting of hydroxy, halogen, C1 to C4 alkyl, C1 to C4 alkoxy, amino, nitro,
• phenyl, optionally substituted by at least one substituent selected from the group consisting of hydroxy, halogen, C1 to C4 alkyl, C1 to C4 alkoxy, amino, nitro,
• furfuryl, optionally substituted by at least one substituent selected from the group consisting of hydroxy, halogen, C1 to C4 alkyl, C1 to C4 alkoxy, amino, nitro,
• and
• R8 is selected from the group comprising amino, hydroxy, fluorine, bromine, chlorine, acyl, acyloxy, amido, alkoxy, benzyloxy, alkylamino, dialkylamino, alkenylamino, carbamoyl, carboxyl, cyano, hydrazino, —NHOH, NHNH2, —NHCONH2, —NH—C(NH)NH2, nitro, sulphanyl, alkylsulphanyl, sulpho, and alkyloxycarbonyl, whereas alkylamino denotes the group —N(Re)2, wherein each Re is independently selected from hydrogen, alkyl, and alkenyl, each of which can be substituted by amino or hydroxyl substituent.