Derivatives of 5-pyridazinyl-1-azabicyclo[3.2.1]octane, preparation method thereof and use of same in therapeutics

A method of treating senile dementia, Parkinson's disease, trisomy 21, Korsakoff's alcoholic syndrome, vascular dementia, cranial trauma or motor disorders observed in Parkinson's disease, comprising administering to a patient in need of said treatment a therapeutically effective amount of a compound of formula (I) or a pharmaceutically acceptable salt thereof:

• in which:
• R is
• either a hydrogen or halogen atom;
• or a phenyl group optionally substituted with one or more halogen atoms, or with one or more groups selected from (C1-C6)alkyl, (C1-C6)alkoxy, nitro, amino, di(C1-C3)alkylamino, trifluoromethyl, trifluoromethoxy, cyano, hydroxyl, acetyl or methylenedioxy groups;
• or a group selected from pyridinyl, pyrazolyl, imidazolyl, triazolyl, tetrazolyl, oxazolyl, thiazolyl, oxadiazolyl, thiadiazolyl, thienyl, furyl, isoxazolyl, isothiazolyl, pyrrolyl and naphthyl, it being possible for this group to be optionally substituted with one or more groups selected from halogen atoms, and (C1-C6)alkyl, (C1-C6)alkoxy, trifluoromethoxy, trifluoromethyl, nitro, cyano, hydroxyl, amino, (C1-C6)alkylamino or di(C1-C6)alkylamino groups.