Compounds of formula (I) ##STR1## wherein one of X and Y represents nitrogen, and the other of X and Y represents oxygen, sulphur or N--R.sup.2 ; Q represents a substituted five- or six- membered monocyclic heteroaliphatic ring which contains one nitrogen atom as the sole heteroatom and is linked to the five-membered heteroatomic ring containing the moieties X and Y via a carbon atom; as well as substituted 1,3-dioxopropane precursors thereto, are ligands for dopamine receptor subtypes within the body and are therefore useful in the treatment of disorders of the dopamine system, in particular schizophrenia.
化合物的结构式(I) ##STR1## 其中X和Y中的一个代表氮,另一个代表氧、
硫或N--R.sup.2;Q代表一种取代的含有一个氮原子作为唯一杂原子的五元或六元单环杂原
芳烃环,通过一个碳原子与含有X和Y的五元杂原
芳烃环连接;以及取代的1,3-二氧代
丙烷前体,它们是体内
多巴胺受体亚型的
配体,因此在治疗
多巴胺系统紊乱,特别是精神分裂症方面具有用处。