Synthesis and biological activity of new dimers in the 7H-pyrido[4,3-c]carbazole antitumor series
作者:C. Garbay-Jaureguiberry、M. C. Barsi、A. Jacquemin-Sablon、J. B. Le Pecq、B. P. Roques
DOI:10.1021/jm00079a009
日期:1992.1
permanent charges provided by the quaternizing chain, led to an almost complete loss of activity, although the DNA bisintercalating property of the dimer was preserved. Dimerization of the 7H-pyrido[4,3-c]carbazole rings by introduction of the rigid spacer on the N7- or C6-positions corresponding to the convex face of the pyridocarbazole, instead of the N2-position in ditercalinium, led to DNA bisintercalating
Ditercalinium(NSC 366241)是7H-吡啶并[4,3-c]咔唑二聚体,其二乙基联哌啶刚性链连接两个杂环。Ditercalinium的特点是具有高的DNA亲和力和双嵌入能力,并具有强大的抗肿瘤特性,涉及原始的作用机理。不幸的是,由于二钙cali具有肝毒性,因此其临床评估已中断。为了消除或至少最小化与其毒性作用有关的严重缺陷,已对二萜的结构进行了几种化学修饰,并通过测量DNA亲和力,嵌入性质和对白血病细胞的毒性来评估其影响。新合成的二聚体。还原二cali的吡啶部分,为了抑制由季铵化链提供的永久电荷,尽管保留了二聚体的DNA双插入性质,但导致活性几乎完全丧失。通过在与吡啶并咔唑的凸面相对应的N7-或C6位置上引入刚性间隔基而不是在二ter中的N2位置,将7H-吡啶并[4,3-c]咔唑环二聚化,从而导致DNA双嵌入二聚体实际上没有抗肿瘤特性。但是,在N2原子进行季铵化后,由N7