Nonprostanoid prostacyclin mimetics. 3. Structural variations of the diphenyl heterocycle moiety
作者:Nicholas A. Meanwell、Michael J. Rosenfeld、Ashok K. Trehan、Jeffrey L. Romine、J. J. Kim Wright、Catherine L. Brassard、John O. Buchanan、Marianne E. Federici、J. Stuart Fleming、Marianne Gamberdella、George B. Zavoico、Steven M. Seiler
DOI:10.1021/jm00097a007
日期:1992.9
4,5-Diphenyl-2-oxazolenonanoic acid (2) and 2-[3-[2-(4,5-diphenyl-2-oxazolyl)ethyl]phenoxy]acetic acid (3) were previously identified as nonprostanoid prostacyclin (PGI2) mimetics that inhibit ADP-induced aggregation of human platelets in vitro. The effects on biological activity of substitution and structural modification of the 4- and 5-phenyl rings of 3 was examined. Potency showed a marked sensitivity
4,5-二苯基-2-恶唑壬酸(2)和2- [3- [2-(4,5-二苯基-2-恶唑基)乙基]苯氧基]乙酸(3)先前被确定为非前列腺素前列环素(PGI2 )在体外抑制ADP诱导的人类血小板聚集的模拟物。考察了3的4-和5-苯基环对取代和结构修饰的生物活性的影响。效能显示出对将取代基引入这些芳族环的显着敏感性,并且只有双-4-甲基衍生物9j(IC50 = 0.34 microM)与母体结构3(IC50 = 1.2 microM)相比具有增强的效能。在苯环的邻位或间位取代,被噻吩基或环己基部分取代,或限制在平面菲系统中产生的化合物不是ADP诱导的血小板聚集的有效抑制剂。相比之下,杂环部分的变化表明,SAR的严格性要低得多,并且发现许多5和6元杂环可有效替代2和3的恶唑环。二苯甲基部分可作为4,5-的有效等排体自13aad以来的二苯环杂环化合物显示出与3相似的血小板抑制活性。除了3,4,5-三苯基吡唑衍生物13g以外,与类似取代的3