Plant antitumor agents. 23. Synthesis and antileukemic activity of camptothecin analogs
作者:Mansukh C. Wani、Allan W. Nicholas、Monroe E. Wall
DOI:10.1021/jm00161a035
日期:1986.11
displayed a wide variance in activity and potency. It was found that monosubstitution by NH2 or OH at positions 9, 10, or 11 yielded compounds with activity much higher than the parent compound, camptothecin, whereas substitution at position 12 greatly reduced activity. In general, disubstitution in ring A greatly reduced antileukemic activity. Replacement of ring A by heterocyclic rings (thiophene
制备了八个光学活性和九个消旋环A修饰的20(S)-喜树碱类似物,并评估了其在L-1210白血病系统中的抗肿瘤活性。环A的单和双取代类似物在活性和效能上显示出很大的差异。发现在位置9、10或11处被NH 2或OH单取代产生的化合物具有比母体化合物喜树碱高得多的活性,而在位置12处的取代大大降低了活性。通常,环A中的混乱可大大减少抗白血病活动。用杂环(噻吩或吡啶)取代环A导致仅具有中等活性的类似物。