申请人:Glaxo Wellcome Inc.
公开号:US06063923A1
公开(公告)日:2000-05-16
The present invention relates to a method for the preparation of camptothecin and camptothecin-like compounds and to novel intermediates used in this preparation. In particular, the invention provides a process for the preparation of the camptothecin derivative of formula (I') known by the chemical name "7-(4-methylpiperazino-methylene)-10,11-ethylenedioxy-20(R,S)-camptothecin ", which comprises cyclising the compound of formula (II'), wherein X is halogen, particularly chloro, bromo, or iodo; and when the compound of formula (I') is obtained as a mixture of enantiomers optionally resolving the mixture to obtain the desired enantiomer, and/or if desired, converting the resulting compound of formula (I') or a salt thereof into a physiologically acceptable salt or solvate thereof.
本发明涉及一种制备喜树碱和类喜树碱化合物的方法,以及在该制备过程中使用的新型中间体。具体而言,该发明提供了一种制备化学名称为“7-(4-甲基哌嗪甲烯)-10,11-乙二氧基-20(R,S)-喜树碱”(分子式为(I')的喜树碱衍生物的方法,其中包括将分子式为(II')的化合物环化,其中X为卤素,特别是氯、溴或碘;当以对映体混合物形式获得分子式为(I')的化合物时,可选择性地分离混合物以获得所需对映体,或者如有需要,将得到的分子式为(I')的化合物或其盐转化为其生理上可接受的盐或溶剂化合物。