Abstract: The invention relates to a compound corresponding to the general formula (I): wherein, X, R1, R2, R3, R4, R5, R5? and R6 are as defined herein. More specifically, this invention relates to intermediates to prepare a compound of formula (I) as well as its utility in treating a variety of diseases including Alzheimer's disease and Parkinson's disease.

Abstract: The invention concerns a compound of general formula (I), wherein: X represents an oxygen or sulphur atom; R1 represents, independently of each other when n=2 or 3, a halogen atom, a hydroxy, a C1-C3 alkyl, a C1-C3 alkoxy, a trifluoromethyl, a trifluoromethyloxy or a methylenedioxy; R2 represents a C1-C6 alkyl group optionally substituted, a C3-C7 cycloalkyl, piperidinyl or phenyl group, the C3-C7 cycloalkyl, piperidinyl or phenyl groups being optionally substituted; R3 represents a hydrogen atom or a C1-C6 alkyl group optionally substituted; R4 represents a hydrogen atom or a C1-C4 alkyl group; and R5 and R5? represent, independently of each other, a hydrogen atom, a hydroxy, a halogen atom, a C1-C3 alkyl group, or R5 and R5? form together an oxo group; R6 represents a hydrogen atom, a halogen atom, a C1-C3 alkyl, a C1-C3 alkoxy, a trifluoromethyl, or a trifluoromethoxy; in the form of a base, addition to an acid, hydrate or solvate.

Abstract: The invention concerns a compound of general formula (I), wherein: X represents an oxygen or sulphur atom; R1 represents, independently of each other when n=2 or 3, a halogen atom, a hydroxy, a C1-C3 alkyl, a C1-C3 alkoxy, a trifluoromethyl, a trifluoromethyloxy or a methylenedioxy; R2 represents a C1-C6 alkyl group optionally substituted, a C3-C7 cycloalkyl, piperidinyl or phenyl group, the C3-C7 cycloalkyl, piperidinyl or phenyl groups being optionally substituted; R3 represents a hydrogen atom or a C1-C6 alkyl group optionally substituted; R4 represents a hydrogen atom or a C1-C4 alkyl group; and R5 and R5′ represent, independently of each other, a hydrogen atom, a hydroxy, a halogen atom, a C1-C3 alkyl group, or R5 and R5′ form together an oxo group; R6 represents a hydrogen atom, a halogen atom, a C1-C3 alkyl, a C1-C3 alkoxy, a trifluoromethyl, or a trifluoromethoxy; in the form of a base, addition to an acid, hydrate or solvate. The invention is applicable in therapy.