Metabolites of Febrifugine and Its Synthetic Analogue by Mouse Liver S9 and Their Antimalarial Activity against <i>Plasmodium</i> Malaria Parasite
作者:Shingo Hirai、Haruhisa Kikuchi、Hye-Sook Kim、Khurshida Begum、Yusuke Wataya、Hidehisa Tasaka、Yuriko Miyazawa、Keisuke Yamamoto、Yoshiteru Oshima
DOI:10.1021/jm0302086
日期:2003.9.1
type alkaloids, febrifugine (1) and isofebrifugine (2), isolated from Dichroa febrifuga roots, show powerful antimalarial activity against Plasmodium falciparum. Unfortunately, their emetic effect and other undesirable side effects have precluded their clinical use for malaria. Because of their antimalarial potency, analogues were searched for, with the goal of preserving the strong antimalarial activity
喹唑啉酮类生物碱,非来福宁(1)和异氟利福因(2)分离自费氏迪克氏菌根,对恶性疟原虫具有强大的抗疟活性。不幸的是,它们的催吐作用和其他不良副作用使它们无法用于疟疾的临床应用。由于其抗疟疾效力,人们一直在寻找类似物,目的是保留强大的抗疟疾活性,同时显着减少副作用。我们预期,通过小鼠肝脏S9,可用于药物开发的化合物将存在于1和Df-1(3)(1与丙酮的缩合产物)衍生的代谢物中。Feb-A和-B(4和5)作为1的主要代谢物被分离。除4和5外,还从3的代谢混合物中纯化了feb-C和-D(6和7)。化合物4和5分别是在喹唑啉酮环的1的C-6和C-2处被氧化的化合物。衍生自3的化合物6和7,也具有非溴精碱型结构,其中哌啶环1的4'-和6'-位置被氧化。使用合成获得的外消旋体4-6和对映体纯净的7进行的体外抗疟和细胞毒性测试表明,4和6对恶性疟原虫具有抗疟活性,具有与1相似的效价,并且具有很高的选择性。