From Peptide to Non-Peptide. 3. Atropisomeric GPIIbIIIa Antagonists Containing the 3,4-Dihydro-1<i>H</i>-1,4-benzodiazepine-2,5-dione Nucleus
作者:Brent K. Blackburn、Arthur Lee、Mark Baier、Benjamin Kohl、Alan G. Olivero、Regina Matamoros、Kirk D. Robarge、Robert S. McDowell
DOI:10.1021/jm960652r
日期:1997.2.1
antagonists. Resolution of these antagonists was accomplished by the introduction of a tert-butyl group at N1 and a chlorine at C9 on the 3,4-dihydro-1H-1,4-benzodiazepine-2,5-dione nucleus and enantiospecific substitution on the beta-alanine side chain attached to N4. The relative configuration was determined by single-crystal X-ray analysis. Further, conformational analyses using ab initio calculations were
非肽GPIIbIIIa拮抗剂的苯并二氮杂二酮类经过修饰,可以分离非相互转化的旋转异构体或阻转异构体,目的是与含活性RGD的肽和其他非肽拮抗剂相比,检查它们的构效关系。这些拮抗剂的拆分是通过在3,4-二氢-1H-1,4-苯并二氮杂-2,5-二酮核上在N1处引入叔丁基和在C9处引入氯并在β上引入对映体特异性取代来实现的-连接至N4的-丙氨酸侧链。相对构型通过单晶X射线分析确定。此外,进行了使用从头算的构象分析,以评估有关β-丙氨酸侧链的构象偏好。数据支持在苯并二氮杂二酮类拮抗剂与在环状肽G4120中发现的RGD三肽序列的“杯状”呈递之间存在良好的地形相关性。讨论了这些化合物与其他肽类和非肽类拮抗剂之间的关系。