Improved P1/P1‘ Substituents for Cyclic Urea Based HIV-1 Protease Inhibitors: Synthesis, Structure−Activity Relationship, and X-ray Crystal Structure Analysis
作者:David A. Nugiel、Kim Jacobs、Lyndon Cornelius、Chong-Hwan Chang、Prabhakar K. Jadhav、Edward R. Holler、Ronald M. Klabe、Lee T. Bacheler、Beverly Cordova、Sena Garber、Carol Reid、Kelly A. Logue、Lorraine J. Gorey-Feret、Gilbert N. Lam、Susan Erickson-Viitanen、Steven P. Seitz
DOI:10.1021/jm960839i
日期:1997.5.1
facilitated the transfer of this improved binding affinity into a superior cellular antiviral activity profile. Several analogs were evaluated further for protein binding and resistance liabilities. Compound 18 (IC90 = 8.7 nM) was chosen for oral bioavailability studies based on its log P and solubility profile. A 10 mg/kg dose in dogs provided modest bioavailability with Cmax = 0.22 microg/mL. X-ray crystallographic
我们提出了几种新颖的P1 / P1'取代基,它们可以取代基于环脲的HIV蛋白酶抑制剂系列的特征性苄基P1 / P1'部分。与未取代的苄基类似物相比,这些取代基通常提供5-10倍的结合亲和力。最好的取代基是3,4-(亚乙二氧基)苄基。分子亲脂性的适当平衡促进了这种改善的结合亲和力向优良细胞抗病毒活性谱的转移。进一步评估了几种类似物的蛋白质结合和抗药性。根据化合物18的log P和溶解度曲线,选择其化合物18(IC90 = 8.7 nM)进行口服生物利用度研究。狗的10 mg / kg剂量具有适度的生物利用度,Cmax = 0.22 microg / mL。两种类似物的X射线晶体学分析揭示了3,4-(乙二氧基)苄基取代的类似物的效力的几个有趣特征:(1)比较这两种络合物,发现每个P1 / P1'取代基有两种不同的结合方式;(2)乙二氧基部分在Pro 81的3.6 A之内,可提供母体结构中缺少的更多范德华接触;(3)酶的Arg