Mechanism-Based Isocoumarin Inhibitors for Blood Coagulation Serine Proteases. Effect of the 7-Substituent in 7-Amino-4-chloro-3-(isothioureidoalkoxy)isocoumarins on Inhibitory and Anticoagulant Potency
作者:Chih-Min Kam、John E. Kerrigan、R. Richard Plaskon、Edward J. Duffy、Pete Lollar、F. L. Suddath、James C. Powers
DOI:10.1021/jm00035a009
日期:1994.4
7-amino-4-chloro-3-(3-isothioureidopropoxy)isocoumarin (NH2-CiTPrOIC) derivatives with various substituents at the 7- and 3-positions have been synthesized as inhibitors of several blood coagulation enzymes. Isocoumarins substituted with basic groups such as guanidino or isothioureidoalkoxy groups were previously shown to be potent irreversible inhibitors of blood coagulation enzymes [Kam et al. Biochemistry
已经合成了在7位和3位带有各种取代基的一系列7-氨基-4-氯-3-(3-异硫脲基丙氧基)异香豆素(NH2-CiTPrOIC)衍生物,它们是几种凝血酶的抑制剂。先前已显示被诸如胍基或异硫脲基烷氧基等碱性基团取代的异香豆素是有效的不可逆的凝血酶抑制剂[Kam et al。生物化学1988,27,2547-2557]。与NH2-CiTPrOIC(4)相比,在3位具有异硫脲基乙氧基和在7位具有大疏水基团的取代的香豆素是更好的凝血酶,VIIa,Xa,XIa,IIa和IXa抑制剂。PhNHCONH-CiTEtOIC(14),(S)-Ph(CH3)CHNHCONH-CiTEtOIC(25),和(R)-Ph(CH3)CHNHCONH-CiTEtOIC(26)非常有效地抑制凝血酶,并且kobs / [I]值为(1-4)x 10(4)M-1 s-1。与人α-凝血酶非共价复合的几种异香豆素的结构模型表明,7位取代基与Lys-60F