hMC4R. Potent cis-(2S,4R)-pyrrolidine based MCR agonists (35a-g) were subsequently developed by means of this design approach. A SAR study directed toward probing the effect of the two chiral centers in the pyrrolidine ring on biological activity revealed the importance of the (S) absolute configuration at the 2-position for binding affinity, agonist potency, and receptor selectivity. Among the four
描述了一系列新型脯
氨酸和
吡咯烷类黑皮质素受体(MCR)激动剂的设计,合成和构效关系(
SAR)。为了验证构象受限的Arg-Nal二肽类似物策略,我们首先合成并评估了顺-(2R,4R)-脯
氨酸类似物(21a-g)的测试集。所有这些化合物在hMC1R,hMC3R和hMC4R上均显示出显着的结合和激动剂效能。随后通过这种设计方法开发了基于顺-(2S,4R)-
吡咯烷的强效MCR激动剂(35a-g)。一项旨在探索
吡咯烷环中两个手性中心对
生物活性影响的
SAR研究表明,在2位上的(S)绝对构型对于结合亲和力,激动剂效能和受体选择性很重要。