Natural products. Antitubulin effect of congeners of <i>N</i>-acetylcolchinyl methyl ether: synthesis of optically active 5-acetamidodeaminocolchinyl methyl ether and of demethoxy analogues of deaminocolchinyl methyl ether
作者:O. Boyé、A. Brossi、H. J. C. Yeh、E. Hamel、B. Wegrzynski、V. Toome
DOI:10.1139/v92-160
日期:1992.5.1
were synthesized by four different routes: (1) Synthesis of 4 was achieved from 2,3-dimethoxybenzaldehyde via biphenyl aldehyde 17, chain lengthening to propionic acid 20, acid-catalyzed cyclization toward ketone 21, and removal of the carbonyl group. (2) Compound 5 was obtained by eliminating the sterically most hindered methoxy group in 25 or 26 by metal reduction in alcohol. (3) Compound 6 was prepared
三甲氧基取代的二氢二苯并环庚烯 4-7 是测量体外微管蛋白聚合抑制的结构-活性研究所需的,通过四种不同的途径合成:(1)通过联苯醛 17 从 2,3-二甲氧基苯甲醛合成 4,链延长为丙酸 20,酸催化环化为酮 21,并去除羰基。(2)通过在醇中金属还原消除25或26中空间位阻最大的甲氧基,得到化合物5。(3) 化合物6由联苯醛34在恶唑啉32上的格利雅反应得到。 (4)化合物7由N-乙酰秋水仙醇41的四唑基醚衍生物还原脱氧得到。化合物 4-7 缺乏抑制活性证明了秋水仙碱和同种异体同源物中的芳香氧原子作为与微管蛋白上秋水仙碱结合位点相互作用点的关键作用。N-乙酰基的光学活性 5-乙酰胺 8a,b 异构体...