Novel esters of N-acyl derivatives of amino acids, and isosorbide, process for their preparation, and use in cosmetics and as a medicine.

Compound of formula (I): ** ** Formula wherein R 'and R ", identical or different, represent: - either a hydrogen atom, - or a monovalent radical of formula (IIa): ** Formula ** in which: - R1 represents an aliphatic, saturated or unsaturated, linear or branched radical, comprising from 7 to 30 carbon atoms, - R2 represents a hydrogen atom or a radical selected from methyl, isopropyl, isobutyl , 1- methyl propyl, hydroxymethyl, 1-hydroxy ethyl, thiomethyl, 2-methylthio ethyl, 4-aminobutyl, 3-guanidino propyl, 3- propyl ureido, (1-amino carbonyl) methyl, carboxy methyl, 2-carboxy ethyl, 2 (amino carbonyl) ethyl, benzyl, 4-hydroxy benzyl, benzyl 3,4-dihydroxy, [1H-indol-3-yl] methyl, (1H-imidazol-4-yl) methyl, 3-amino propyl, and - R3 represents a hydrogen atom or a methyl radical, - or a monovalent radical of formula (IIb): ** ** formula wherein: - R1 is as defined in formula (IIa) and - R4 represents a hydrogen atom or a hydroxyl radical, it being understood that at least one of the radicals R 'or R "does not represent a hydrogen atom and that when any of the radicals R' and R" does not represent a hydrogen atom, R 'and R "are identical.