Protease Inhibitors: Synthesis and QSAR Study of Novel Classes of Nonbasic Thrombin Inhibitors Incorporating Sulfonylguanidine and <i>O</i>-Methylsulfonylisourea Moieties at P1
作者:Claudiu T. Supuran、Andrea Scozzafava、Fabrizio Briganti、Brian W. Clare
DOI:10.1021/jm9903693
日期:2000.5.1
angles (FOPA), that account for the directions of the nodes in the pi orbitals in the aromatic portion of those of the drugs in which the sulfonyl group was bound to a benzene ring. For thrombin inhibition, the size of the molecule was the dominant influence, while for trypsin inhibition the FOPA was the principal determinant of activity. The dependence of activity on the FOPA variables is perhaps the
使用苯甲idine作为先导分子,已制备了两个系列的烷基/芳烷基/芳基磺酰基胍/磺酰基-O-甲基异脲+ ++,并作为两种丝氨酸蛋白酶,凝血酶和胰蛋白酶的抑制剂进行了分析。研究表明,磺胺胍及其相应的O-甲基异脲衍生物具有中等但固有的选择性凝血酶抑制特性,K(I)对凝血酶的抑制作用约为100 nM,对胰蛋白酶的抑制作用为1350-1500 nM。这两个分子的进一步加工提供了在12至50 nM范围内用K(I)抑制凝血酶的化合物,而对胰蛋白酶的亲和力仍然较低。通过将苄氧羰基或4-甲苯磺酰脲基保护的氨基酸(例如L-和D-Phe或L-Pro)或二肽(例如Phe-Pro,Gly-His,β-Ala-His,或Pro-Gly)引入上述两个导基,磺胺胍和4-氨基苯磺酰基-O-甲基异脲。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基抑制剂家族中的两个新颖的S1锚定