Cyclopropane-Derived Peptidomimetics. Design, Synthesis, Evaluation, and Structure of Novel HIV-1 Protease Inhibitors
作者:Stephen F. Martin、Gordon O. Dorsey、Todd Gane、Michael C. Hillier、Horst Kessler、Matthias Baur、Barbara Mathä、John W. Erickson、T. Nagarajan Bhat、Sanjeev Munshi、Sergei V. Gulnik、Igor A. Topol
DOI:10.1021/jm980033d
日期:1998.5.1
dynamic calculations using an explicit DMSO solvent box. The preferred solution conformations of 9 and 10 are extended structures that closely resemble the three-dimensional structure of 10 bound to HIV-1 protease as determined by X-ray crystallographic analysis of the complex. This work convincingly demonstrates that extended structures of peptides may be stabilized by the presence of substituted cyclopropanes
为了确立使用三取代的环丙烷作为肽模拟物来稳定延伸的肽结构的一般功效,将环丙烷20a-d作为替代物掺入了9-13中,它们是已知的HIV-1蛋白酶抑制剂14和15的类似物。 20a-d开始于Rh2 [5(S)-MEPY] 4-催化的烯丙基重氮酯16a-d的环化反应,得到高对映体过量的环丙基内酯17a-d。使用Weinreb方案打开内酯部分并直接将中间体酰胺18a-d重新官能化,得到20a-d。使用相似的反应序列来制备N-甲基-2-吡啶基类似物28。20a-d和28与已知的二氨基二醇22的偶联以9-13递送。在生物学试验中发现伪肽9-12是野生型HIV-1蛋白酶的竞争性抑制剂,其中Kis为0.31-0.35 nM(9),0.16-0.21 nM(10),0.47 nM(11)和0.17 nM(12)。因此,这些抑制剂与衍生自它们的已知抑制剂14(IC50 = 0.22 nM)大致相等。另一方面,13(Ki