Chemical Modification of an Antitumor Alkaloid Camptothecin: Synthesis and Antitumor Activity of 7-C-Substituted Camptothecins.
作者:Seigo SAWADA、Ken-ichiro NOKATA、Tomio FURATA、Teruo YOKOKURA、Tadashi MIYASAKA
DOI:10.1248/cpb.39.2574
日期:——
derivatives (10), acid (11), esters (12) and amides (13) were synthesized starting from 2. 7-Ethyl- (4b) and 7-propylcamptothecin (4c), acyloxymethyl compounds 6a, 6c and ethyl ester (12b) exhibited higher antitumor activity than 1 against L1210 in mice.
20(S)-喜树碱(1)与甲醇的自由基取代反应提供了7-羟甲基喜树碱(2)。1与高于甲醇的伯醇反应生成7-烷基喜树碱(4),其中烷基比所用的醇少1个碳,并且7-羟烷基喜树碱(5)。为了制备7-烷基喜树碱(4),使用醛作为自由基来源,并合成了几种烷基化衍生物。由2. 7-乙基-(4b)和7开始合成7-酰氧基甲基衍生物(6),7-甲醛(7),亚氨基甲基衍生物(10),酸(11),酯(12)和酰胺(13)。丙基喜树碱(4c),酰氧基甲基化合物6a,6c和乙酯(12b)在小鼠中对L1210的抗肿瘤活性高于1。