Secondary Structure Peptide Mimetics: Design, Synthesis, and Evaluation of β-Strand Mimetic Thrombin Inhibitors
作者:P. Douglas Boatman、Cyprian O. Ogbu、Masakatsu Eguchi、Hwa-Ok Kim、Hiroshi Nakanishi、Bolong Cao、J. Paul Shea、Michael Kahn
DOI:10.1021/jm980354p
日期:1999.4.22
Constrained dipeptide mimetic templates were designed to mimic the secondary structure of peptides in a beta-strand conformation. Two templates corresponding to the D-Phe-Pro portion of the thrombin inhibitor D-Phe-Pro-ArgCH2Cl were synthesized and converted into nine alpha-ketoamide and alpha-ketoheterocycle inhibitors of thrombin. Additionally, a template corresponding to L-Phe-Pro was synthesized
设计约束性的二肽模拟物模板,以模仿β链构象的肽的二级结构。合成了与凝血酶抑制剂D-Phe-Pro-ArgCH2Cl的D-Phe-Pro部分相对应的两个模板,并将其转换为九种凝血酶的α-酮酰胺和α-酮杂环化合物抑制剂。另外,合成对应于L-Phe-Pro的模板并将其转化为凝血酶抑制剂。确定了这些化合物对凝血酶的体外抑制作用,并且发现与D-Phe-Pro相对应的那些抑制剂比L-Phe-Pro模拟物更有效。发现α-酮酰胺比α-酮杂环更有效,但速率慢得多。通过一系列α-酮酰胺类似物的比较,显然,优选在凝血酶活性位点的P′部分结合大量的疏水取代基。针对一系列凝结和抗凝酶筛选了三种抑制剂(MOL098,MOL144和MOL174),发现它们对抑制凝结酶具有选择性。在肠道吸收的体外模型中测试了两种抑制剂,发现它们的吸收潜力低。然后在大鼠和灵长类动物中对化合物进行体内测试,其中一种(MOL144)在两种物种