Synthesis and Antitumor Activity of Ring A- and F-Modified Hexacyclic Camptothecin Analogues
作者:Masamichi Sugimori、Akio Ejima、Satoru Ohsuki、Kouichi Uoto、Ikuo Mitsui、Yasuyoshi Kawato、Yasuhide Hirota、Keiki Sato、Hirofumi Terasawa
DOI:10.1021/jm970765q
日期:1998.6.1
and F-modified hexacyclic analogues of camptothecin were synthesized by Friedlander condensation of appropriately substituted bicyclic amino ketones with tricyclic ketone and were evaluated for cytotoxicity and topoisomerase I inhibitory activity. Seventeen of the compounds showed cytotoxic effects comparable or superior to those of 7-ethyl-10-hydroxycamptothecin (SN-38) against mouse leukemia P388 and
通过适当取代的双环氨基酮与三环酮的弗里德兰德缩合合成喜树碱的19个A和F环修饰的六环类似物,并评价其细胞毒性和拓扑异构酶I抑制活性。17种化合物对小鼠白血病P388和人肿瘤细胞系HOC-21和QG-56的细胞毒性作用与7-乙基-10-羟基喜树碱(SN-38)相当或更好。在六环化合物的A环的5位上引入致密且感应吸电子的取代基,例如羟基,甲氧基,氯或氟基,显着提高了抗肿瘤活性。拓扑异构酶I抑制这些化合物的效力与其细胞毒性显示出良好的相关性。他们之中,