WAY-267,464 (1) and twelve conformationally rigid analogues (3a-f–4a-f) were synthesised, characterised and evaluated in cellular assays with the aim of systematically exploring interactions with the oxytocin receptor (OTR). Each analogue was evaluated in radioligand binding displacement assays at both human OTR and arginine vasopressin 1a receptors (V_1aR). Physiological characterisation was determined by whole cell IP1 accumulation assays on stably transfected human embryonic kidney (HEK) cells. Incorporation of the rigid, optionally substituted benzene ring abolished OTR activity and diminished V_1aR pharmacology when compared to 1. A general trend was observed in V_1aR affinity for the propyl analogues (3d-3f) which identified the ortho-substituted analogue as the best in series (Ki = 251 nM) followed by a decrease in affinity through the meta and para-derivatives (3e; Ki = 874 nM and 3f; Ki = 1756 nM respectively). This study confirms the importance of the central pharmacophoric motifs of WAY-267,464 and illuminates the differences in the binding pocket of the highly conserved OTR and V_1aR.

WAY-267,464（1）和十二种构象刚性的类似物（3a-f-4a-f）进行了合成，表征和细胞分析中的评估，目的是系统地探索与催产素受体（OTR）的相互作用。在人类OTR和精氨酸加压素1a受体（V _1a R）的放射性配体结合置换试验中评估了每个类似物。通过对稳定转染的人胚肾（HEK）细胞进行全细胞IP1累积测定来确定生理学特征。与1相比，刚性，可选取代的苯环的结合消除了OTR活性，并降低了V _1a R药理作用。在V _1a中观察到总体趋势对丙基类似物（3d-3f）的R亲和力将邻位取代的类似物鉴定为最佳串联（Ki = 251 nM），随后通过间位和对位衍生物的亲和力降低（3e ; Ki = 874 nM和3f； Ki分别为1756 nM）。这项研究证实了WAY-267,464的中心药效基序的重要性，并阐明了高度保守的OTR和V _1a R的结合口袋中的差异。