PCT No. PCT/GB94/00607 Sec. 371 Date Dec. 20, 1995 Sec. 102(e) Date Dec. 20, 1995 PCT Filed Mar. 23, 1994 PCT Pub. No. WO94/22839 PCT Pub. Date Oct. 13, 1994A class of benzimidazole derivatives, substituted at the 2-position by a substituted piperazinylmethyl or piperazinylethyl moiety, are antagonists of dopamine receptor subtypes within the brain, having a selective affinity for the dopamine D4 receptor subtype over other dopamine receptor subtypes, and are accordingly of benefit in the treatment and/or prevention of psychotic disorders such as schizophrenia whilst manifesting fewer side-effects than those associated with classical neuroleptic drugs.
Antipsychotic benzimidazole derivatives