Compound of formula (I): ** Formula ** in which: - R1 is selected from the group consisting of hydrogen, halogen, cycloalkyl and alkyl of three or four carbon atoms, linear or branched - Y is selected from the group that it consists of C-R2 and a nitrogen atom； - R2 is selected from the group consisting of: a) an aryl or heteroaryl group which is optionally substituted by one or more halogen atoms or by one or more cycloalkyl, hydroxy, (C1-C8) alkoxy, (C1-C8) alkylthio groups ), amino, mono- or dialkylamino, alkoxyalkyl, hydroxycarbonyl and alkoxycarbonyl. b) an alkoxycarbonyl group of the formula (-CO (R7), where R7 represents a hydroxyl group or a group [-N (R8) (R9)]； R8 and R9 are independently selected from the group consisting of hydrogen atom, cycloalkyl , and alkyl of three or four carbon atoms, linear or branched and optionally substituted by halogen or an aryl or heterocyclic group； or R8 and R9 form, together with the nitrogen atom to which a saturated ring of five or six members are attached optionally comprising an additional heteroatom selected from the group consisting of oxygen and nitrogen that may be optionally substituted by a (C1-C8) alkyl group； - R3 is selected from the group consisting of hydrogen, halogen, cycloalkyl group and an alkyl group ( C1-C8), linear or branched optionally substituted by halogen atoms； or R2 and R3 form, together with the carbon atoms to which they are attached, a six-membered aryl or heteroaryl ring, optionally substituted by a or or more halogen atoms or by one or more groups selected from the group consisting of cycloalkyl, hydroxy, (C1-C8) alkoxy, (C1-C8) alkylthio, amino, mono or dialkylamino, alkoxyalkyl, hydroxycarbonyl and alkoxycarbonyl； - X is selected from the group consisting of halogen atom or cyano group； - R4, R5 and R6 are independently selected from the group consisting of: a) hydrogen atom b) an alkyl, cycloalkyl or cycloalkylalkyl group having a maximum of five carbon atoms, linear or branched subst
