作者:Peter W. Glunz、Luciano Mueller、Daniel L. Cheney、Vladimir Ladziata、Yan Zou、Nicholas R. Wurtz、Anzhi Wei、Pancras C. Wong、Ruth R. Wexler、E. Scott Priestley
DOI:10.1021/acs.jmedchem.6b00244
日期:2016.4.28
Incorporation of a methyl group onto a macrocyclic FVIIa inhibitor improves potency 10-fold but is accompanied by atropisomerism due to restricted bond rotation in the macrocyclic structure, as demonstrated by NMR studies. We designed a conformational constraint favoring the desired atropisomer in which this methyl group interacts with the S2 pocket of FVIIa. A macrocyclic inhibitor incorporating this
如NMR研究所示,将甲基结合到大环FVIIa抑制剂上可将效力提高10倍,但由于在大环结构中键旋转受限制而伴有阻转异构现象。我们设计了有利于所需阻转异构体的构象约束,其中该甲基与FVIIa的S2口袋相互作用。制备了具有该约束的大环抑制剂,并通过NMR证明其主要存在于所需的构象中。相对于未取代的外消旋大环化合物,该修饰将效能提高了180倍,并提高了选择性。获得了FVIIa活性位点中密切相关的类似物的X射线晶体结构,该结构与NMR和模拟的构象相符,证实了这种构象约束确实确实将甲基按设计方向引入了S2口袋。得到的合理设计,构象稳定的模板使这些大环抑制剂的进一步优化成为可能。