The invention relates to 1-oxo-isoindoline-4-carboxamide and 1-oxo-1,2,3,4-tetrahydroisoquinoline-5-carboxamide derivatives of general formula (I) where: R1 = H, C1-C10alkyl, C3-C7cycloalkyl, (CH2)n-(C1-C6)alkenyl, (CH2)n-(C1-C6)alkynyl, (C1-C6)alkyl-Z-(C1-C6)alkyl, where Z = a heteroatom chosen from O, N and S(O)m, or R1 = COOR, S(O)mR, aryl or aralkyl, R2 = one or more of H, halogen, C1-C6alkyl, C3-C7cycloalkyl, C1-C6alkenyl, C1-C6alkynyl, C1-C6alkyl-Z-(C1-C6)alkyl, where Z = a heteroatom chosen from O, N and S(O)m, or R2 = halo(C1-C6)alkyl, C1-C6alkoxy, halo(C1-C6)alkoxy, hydroxy, nitro, cyano, amino, NR7R8, COOR, CONR7R8, O- CO(C1-C6)alkyl, S(O)m-NR7R8, aryl R3 = trifluoromethylR4 and R5 independently = H, or R4 and R5 together with the carbon to which they are attached form a saturated ring with 3 to 6 C and optionally containing O to 1 heteroatoms chosen from O, N or S R6 = H,halogen, C1- C6alkyl, C3-C7cycloalkyl, C3-C7cycloalkyl-(C1-C6)alkyl, halo(C1-C6)alkyl, nitro, amino, NR7R8, COOR, NR7(SO2)R8, CONR7R8, aryl or heterocycle X = C1-C2alkylene m = a whole number from O to 2 and n = a whole number from1 to 6. The invention further relates to a method for preparation and therapeutic application thereof as ß-secretase inhibitors for the treatment of neurodegenerative disorders such as Alzheimers.Linvention concerne les dérivés de 1-oxo-isoindoline-4-carboxamides et de 1-oxo- 1,2,3,4-tétrahydroisoquinoléine-5-carboxamides, de formule générale (I) dans laquelle R1 représente un atome dhydrogène, un groupe (C1-C6)alkyle, (C3-C7)cycloalkyle (CH2)n-(C1-C6)alcényle, (CH2)n-(C1-C6)alcynyle, (C1-C6)alkyle-Z-(C1-C6)alkyle dans lequel Z représente un hétéroatome choisi parmi O, N et S(O)m, ou bien R1 représente u groupe COOR, S(O)mR, un aryle ou un aralkyle R2 représente un ou plusieurs groupe choisis parmi un atome dhydrogène, un atome dhalogène, un groupe (C1-C6)alkyle, (C3- C7)cycloalkyle,.(C1-C6)alcényle, (C1-C6)alcynyle, (C1-C6)alkyle-Z-(C1-C6)alky!e, dans lequel Z
