Substituted 1-benzyl-cinnolin-4(1H)-one derivatives, preparation thereof, and therapeutic use thereof

A compound of formula (I):

• wherein:
• R1 represents:
• a phenyl which is unsubstituted or substituted one or more times by substituents chosen independently from a halogen atom, an Alk group, an OAlk group, a cyano, an —NH SO2Alk group and an —SO2Alk group;
• a naphthyl which is unsubstituted or substituted one or more times by substituents chosen independently from a halogen atom, an Alk group and an OAlk group;
• a pyridyl which is unsubstituted or substituted one or more times by substituents chosen independently from a halogen atom, an Alk group and an OAlk group;
• a 1-benzothienyl which is unsubstituted or substituted one or more times by substituents chosen independently from a halogen atom, an Alk group and an OAlk group;
• or
• a 1,3-benzodioxolyl which is unsubstituted or substituted one or more times by substituents chosen independently from a halogen atom, an Alk group and an OAlk group;
• R2 represents:
• a phenyl which is unsubstituted or substituted once or twice by substituents chosen independently from a halogen atom, an Alk group and a cyano;
• or
• a thienyl or a pyridyl, each of which is substituted by a halogen atom or an Alk group;
• R3 represents a hydrogen atom, a halogen atom, an Alk group or an OAlk group;
• and
• Alk represents a (C1-C4)alkyl which is unsubstituted or substituted one or more times by a fluorine atom;
• or an acid addition salt thereof.