Protease inhibitors – Part 3. Synthesis of non-basic thrombin inhibitors incorporating pyridinium-sulfanilylguanidine moieties at the P1 site
作者:Andrea Scozzafava、Fabrizio Briganti、Claudiu T Supuran
DOI:10.1016/s0223-5234(99)00115-4
日期:1999.11
the same substitution pattern at the pyridinium ring. Thus, the present study proposes two novel approaches for the preparation of high affinity, specific thrombin inhibitors: a novel S1 anchoring moiety in the already large family of arginine/amidine-based inhibitors, i.e., the SO(2)N=C(NH(2))(2) group, and novel non-peptidomimetic scaffolds obtained by incorporating alkyl-/aryl-substituted-pyridinium
以苄am和磺胺胍为先导分子,通过磺胺胍与吡喃鎓盐,分别与甘氨酸的吡啶鎓衍生物和与β-丙氨酸的吡啶鎓衍生物反应,制备了三个系列的衍生物。测定了新化合物作为两种丝氨酸蛋白酶,凝血酶和胰蛋白酶的抑制剂。研究表明,与铅相比,新的衍生物对凝血酶的K(I)分别约为100-300 nM,对胰蛋白酶的K(I)约为1200-1500 nM,对铅的抑制常数为15-50 nM。凝血酶,而它们对胰蛋白酶的亲和力仍然较低。β-丙氨酸的衍生物比相应的Gly衍生物更具活性,其反过来比磺胺胍的吡啶鎓衍生物在吡啶鎓环上具有相同的取代方式更具抑制性。因此,本研究提出了两种制备高亲和力,特异性凝血酶抑制剂的新颖方法:在已经很大的精氨酸/ am基抑制剂家族中,即SO(2)N = C(NH (2))(2)基团,以及通过在疏水结合位点掺入烷基-/芳基取代的吡啶鎓部分而获得的新型非拟肽支架。第一个对于获得可生物利用的凝血酶抑制剂很重要,因为缺乏常用的精氨酸/