Optically active or racemic compounds are provided having the formula ##STR1## where R.sub.1 is ##STR2## where Y is hydrogen, halogen or C.sub.1 to C.sub.6 linear or branched alkyl; R.sub.6 is C.sub.1 to C.sub.4 linear or branched alkyl; X is oxygen or sulfur; a is an integer from zero to 3; and n is an integer from 1 to 4. The compounds are capable of binding selectively to dopamine D.sub.2 receptors and are useful in treatment of disorders of the central nervous, cardiovascular and endocrine systems, such as intraocular pressure, schizophrenia and Parkinsonism, and for inducing anorexia and weight loss in humans and other mammals.
提供具有以下公式的光学活性或外消旋化合物 ##STR1## 其中R.sub.1是 ##STR2## 其中Y是氢,卤素或C.sub.1到C.sub.6线性或支链烷基; R.sub.6是C.sub.1到C.sub.4线性或支链烷基; X是氧或
硫; a是从零到3的整数; n是从1到4的整数。这些化合物能够选择性地结合到
多巴胺D.sub.2受体,并且在治疗中枢神经,心血管和内分泌系统的疾病方面有用,例如眼内压,精神分裂症和帕
金森病,并可在人类和其他哺乳动物中引起厌食和减重。