Novel derivatives of sinapinic acid and the cosmetic or pharmaceutical uses thereof

The invention relates to a compound of general formula (I) wherein R1 R2 and R3 independently represent a hydrogen atom; a C1-12 alkyl group; a C2-12 alkyl group; a C2-12 alkynyl group; a C3-12 cycloalkyl group; a C1-12 acyl group; a sulfonyl group or a phosphonate group; x = Y is a CH2-CH2 group or a CH=CH group; and n is a whole number between 1 and 3; or one of the salts thereof. The invention also relates to the synthesis method of said compound, to a composition containing said compound, to the cosmetic use thereof especially as a depigmenting agent and/or as an anti-free radical agent, to a cosmetic care method and to the use thereof as a medicament, advantageously used to prevent and/or treat a pathological hyperpigmentation and/or an inflammation.