ARYLPIPERAZINE DERIVATIVES AND THEIR USE AS LIGANGS SELECTIVE OF THE DOPAMINE D3 RECEPTOR

Arylpiperazine derivatives (I) are new. Arylpiperazine derivatives of formula (I) and their stereoisomers, mixtures, tautomers, hydrates, solvates, salts and esters are new. a = 5 or 6; b-d = 1 or 2; R 1-R 4= H, halo, OH, alkyl, fluoroalkyl, polyfluoroalkyl, (polyfluoro)alkoxy, (polyfluoro)alkylsulfanyl, CN, OS(O) m-alkyl, NRR a, C(O)OR, C(O)R, C(O)NRR a, C(OH)RR a, alkylene-C(OH)RR a, alkylene-C(O)OR, alkylene-C(O)R, alkylene-C(O)NRR aor alkylene-NRR a; or two adjacent groups R 1-R 4= heterocycle (optionally unsaturated and/or fused with phenyl); R 5-R 9= H, OH, alkyl, fluoroalkyl, polyfluoroalkyl, (polyfluoro)alkoxy, (polyfluoro)alkylsulfanyl, CN, NRR a, C(O)OR, C(O)R or C(O)NRR a; or two adjacent groups R 5-R 9= heterocycle (optionally unsaturated and/or fused with phenyl); R, R a= H or alkyl; or RR a= (oxa)polymethylene; and m = 0-2. Independent claims are also included for preparation of (I). [Image] ACTIVITY : Neuroleptic; Antidote; Endocrine-Gen.; Vasotropic; CNS-Gen.; Muscular-Gen.; Antiparkinsonian; Antidepressant; Antiaddictive; Antialcoholic; Antismoking; Antiinfertility. MECHANISM OF ACTION : Dopamine D3 receptor ligand. The ability of (I) to bind with dopamine D3 receptor was tested on human cells. The results showed that 1-(5-methoxyisoindolin-2-yl)-6-[4-(3-trifluoromethylphenyl)piperazin-1-yl]hexan-1-one exhibited an inhibition constant of 0.9 nM.