E-ring-modified 7-oxyiminomethyl camptothecins: Synthesis and preliminary in vitro and in vivo biological evaluation
作者:Giuseppe Giannini、Mauro Marzi、Walter Cabri、Elena Marastoni、Gianfranco Battistuzzi、Loredana Vesci、Claudio Pisano、Giovanni Luca Beretta、Michelandrea De Cesare、Franco Zunino
DOI:10.1016/j.bmcl.2008.03.074
日期:2008.5
derivatives of homocamptothecins showed ability to form stable ternary complexes with DNA and topoisomerase I. The 7-oxyiminomethyl derivatives of homocamptothecins were evaluated as a racemic mixture. Following the isolation of the two enantiomers, the 20 (R)-hydroxy isomer confirms the best activity. By using a panel of human tumor cells, all tested homocamptothecins showed a potent antiproliferative activity
与五元E环类似物相反,高喜树碱的7-氧亚氨基甲基衍生物具有与DNA和拓扑异构酶I形成稳定的三元复合物的能力。高喜树碱的7-氧亚氨基甲基衍生物被评估为外消旋混合物。在分离出两种对映异构体之后,20(R)-羟基异构体证实了最佳活性。通过使用一组人类肿瘤细胞,所有测试的同型喜树碱均显示出有效的抗增殖活性,与可裂解复合物的持久性相关。在天然支架和相应的喜树碱同系物之间没有观察到显着差异。该系列的选定化合物对人胃肠道肿瘤异种移植物表现出优异的抗肿瘤活性。