| abstract |
Compounds of general formula (I) in which each of R1, R2 and R3 represents a hydrogen or halogen atom or a hydroxy, alkyl or alkoxy group, R4 represents a hydrogen or halogen atom or an alkyl, 2-methoxyethoxy, alkoxy, cycloalkylmethoxy or phenylmethoxy group, or R3 and R4 together form a methylenedioxy group, Z represents oxygen or two hydrogen atoms and R represents an ethoxy group when Z represents oxygen, or represents a phenyl group optionally substituted by one or more halogen atoms or alkyl, alkoxy or amino groups. The compounds have a strong affinity for dopamine receptors of D2 and D3 type and for serotonin receptors of 5-HT1A and 5-HT2 type and are mixed ligands. Other compounds have a strong affinity for the dopamine receptors of D3 type and a weak affinity for the dopamine receptors of D2 type and serotonin receptors of 5-HT1A and 5-HT2 and are therefore selective and specific ligands. |