optimised synthesis of a hypoxia-activated anticancer prodrug related to the duocarmycin family of natural products is described. The improved 10-step synthesis increases the overall yield from 4.4% to over 40% while requiring just 2 chromatography-based purifications. The most significant improvements optimise the isomer distribution in a key chlorosulfonylation reaction, and facilitate the removal of tin
描述了与
天然产物杜卡霉素家族有关的缺氧激活的抗癌前药的优化合成方法。改进的10步合成将总收率从4.4%提高到40%以上,而仅需进行2次基于色谱的纯化。最重要的改进是在关键的
氯磺酰化反应中优化了异构体的分布,并促进了从氢化三
丁基锡介导的自由基反应中去除
锡残留物。还报道了改进的两个侧链的制备。该新方法为获得足够的材料提供了实用途径,以支持先进的功效和毒理学评估。