Total and semisynthesis and in vitro studies of both enantiomers of 20-fluorocamptothecin
作者:Raghuram S. Tangirala、Rachel Dixon、Danzhou Yang、Attila Ambrus、Smitha Antony、Keli Agama、Yves Pommier、Dennis P. Curran
DOI:10.1016/j.bmcl.2005.07.074
日期:2005.11
Both enantiomers of 20-fluorocamptothecin and the racemate have been prepared by total synthesis. The (R)-enantiomer is essentially inactive in a topoisomerase-I/DNA assay, while the (S)-enantiomer is much less active than (20S)-camptothecin. The lactone ring of 20-fluorocamptothecin hydrolyzes more rapidly than that of camptothecin in PBS. The results provide insight into the role of the 20-hydroxy
通过全合成制备了20-氟喜树碱的对映体和外消旋体。(R)-对映体在拓扑异构酶-I / DNA分析中基本上是无活性的,而(S)-对映体的活性远低于(20S)-喜树碱。20-氟喜树碱的内酯环比喜树碱在PBS中的内酯环水解得更快。该结果提供了关于20-羟基在喜树碱与拓扑异构酶-I和DNA结合中的作用的见解。