Synthesis, Characterization, and Structure−Activity Relationships of Amidine-Substituted (Bis)benzylidene-Cycloketone Olefin Isomers as Potent and Selective Factor Xa Inhibitors
作者:William J. Guilford、Kenneth J. Shaw、Jerry L. Dallas、Sunil Koovakkat、Wheeseong Lee、Amy Liang、David R. Light、Margaret A. McCarrick、Marc Whitlow、Bin Ye、Michael M. Morrissey
DOI:10.1021/jm990456v
日期:1999.12.1
Factor Xa (FXa) is a trypsin-like serine protease that plays a key role in blood coagulation linking the intrinsic and extrinsic pathways to the final common pathway of the coagulation cascade. During our initial studies, we observed facile photochemical conversion of the known FXa/tPA inhibitor, BABCH ¿(E,E)-2, 7-bis(4-amidinobenzylidene)cycloheptan-1-one, 1a, to the corresponding (Z,Z) olefin isomer
Xa因子(FXa)是一种胰蛋白酶样的丝氨酸蛋白酶,在凝血过程中起着关键作用,将内在和外在途径连接到凝血级联的最终通用途径。在我们的初步研究中,我们观察到了已知的FXa / tPA抑制剂BABCH-(E,E)-2,7-双(4-ami基亚苄基)环庚-1-酮1a容易地光化学转化为相应的(Z, Z)烯烃异构体1c(FXa K(i)= 0.66 nM),比相应的(E,E)异构体(1a,FXa K(i)= 17 000 nM)强25,000倍。为了确定这一观察结果的范围,我们通过在环烷酮环,4-取代的环己酮类似物和修饰的am衍生物的同源系列中制备烯烃异构体,扩展了我们的初步研究。在大多数情况下,烯烃异构体的效价顺序为(Z,Z)>(E,Z)>(E,E),其中环庚酮类似物(1c)显示出最有效的因子Xa抑制活性。此外,我们发现,通过向环烷酮环中添加一个羧酸基团可以显着提高对凝血酶(FIIa)的选择性,如8c所示(FXa