Corticotropin-Releasing Hormone Receptor Antagonists: Framework Design and Synthesis Guided by Ligand Conformational Studies
作者:C. Nicholas Hodge、Paul E. Aldrich、Zelda R. Wasserman、Christina H. Fernandez、Gregory A. Nemeth、Argyrios Arvanitis、Robert S. Cheeseman、Robert J. Chorvat、Engelbert Ciganek、Thomas E. Christos、Paul J. Gilligan、Paul Krenitsky、Everett Scholfield、Philip Strucely
DOI:10.1021/jm980223o
日期:1999.3.1
anilinopyrimidines I were identified as potent antagonists of corticotropin-releasing hormone-1 receptor (CRH1-R, also referred to as corticotropin-releasing factor, CRF1-R). Our next goal was to understand the receptor-bound conformation of the antagonists and to use this information to help guide preclinical optimization of the series and to develop new leads. Since receptor structural information was not available
如前文所述(Arvanitis等,J。Med。Chem。1999,42),苯胺嘧啶类化合物I被确定为促肾上腺皮质激素释放激素-1受体(CRH1-R,也称为促肾上腺皮质激素释放因子)的有效拮抗剂。 ,CRF1-R)。我们的下一个目标是了解拮抗剂的受体结合构象,并使用此信息来帮助指导该系列产品的临床前优化并开发新的潜在客户。由于无法获得受体的结构信息,我们假设这些小的高亲和力拮抗剂倾向于以与其全局最低值或在能量上接近其全局最低值的方式结合,并且保持结合的苯胺嘧啶的重要立体电子特征的刚性类似物也将紧密结合。 。通过半经验方法确定了构型偏好和苯胺嘧啶的旋转障碍,X射线和可变温度NMR光谱学提供了与计算结构良好相关的实验结果。利用这些数据,关键的二面角被约束来设计稠环类似物,取代的N-芳基吡咯并吡啶II,其合成为CRH1受体拮抗剂提供了与初始同类导线(Ki = 1 nM)相同的效价,并且紧密匹配由晶