Antitumor Agents. 172. Synthesis and Biological Evaluation of Novel Deacetamidothiocolchicin-7-ols and Ester Analogs as Antitubulin Agents
作者:Qian Shi、Pascal Verdier-Pinard、Arnold Brossi、Ernest Hamel、Andrew T. McPhail、Kuo-Hsiung Lee
DOI:10.1021/jm960663k
日期:1997.3.1
treatment of 9 with the optically pure reagent (1S)-(-)-camphanic chloride followed by chromatographic separation of the camphanate esters and hydrolysis of the diastereomers. X-ray crystallographic analysis established the aS,7S-configuration of 9a. Racemic and optically active esters 11-15, 11a,b, 12a, 14a, and 15a were obtained by esterification of the corresponding alcohols. The compounds showing activity
已经合成了一系列新颖的7-O-取代的对乙酰氨基硫代秋水仙碱衍生物,并评估了它们对微管蛋白聚合的抑制活性,[3H]-秋水仙碱与微管蛋白的结合以及人类伯基特淋巴瘤细胞的生长。在这些新的衍生物中,通过席夫碱平衡和酸水解从脱乙硫基秋水仙碱(6)获得了硫代秋水仙碱(8),其中硫代秋水仙碱中的乙酰氨基被C(7)处的羰基氧取代。用硼氢化钠还原硫代秋水仙碱得到外消旋醇9,其结构通过X射线晶体学分析证实。光学纯醇9a,通过用光学纯试剂(1S)-(-)-樟脑氯化物处理9,然后色谱分离樟脑酸酯和非对映异构体水解,得到b。X射线晶体学分析确定了9a的aS,7S构型。外消旋和旋光酯11-15、11a,b,12a,14a和15a是通过将相应的醇酯化而获得的。在所有生物学测定中显示等于或大于(-)-thiocolchicione(2a)的活性的化合物为三种(-)-aS,7S光学纯对映异构体:醇9a,乙酸酯11a(硫代秋