Synthesis and Antiplasmodial Activity of Aminoalkylamino-Substituted Neocryptolepine Derivatives
摘要:
A series of chloro- and aminoalkylamino-substituted neocryptolepine (5-methyl-5H-indolo[2,3-b]quinoline) derivatives were synthesized and evaluated as antiplasmodial agents. The evaluation also included cytotoxicity (MRCS cells), inhibition of beta-hematin formation, and DNA interactions (DNA-methyl green assay). Introduction of aminoalkylamino chains increased the antiplasmodial activity of the neocryptolepine core substantially. The most efficient compounds showed antiplasmodial activities in the nanomolar range. N-1,N-1-Diethyl-N-4-(5-methyl-5H-indolo[2,3-b]quinolin-8-yl)pentane-1,4-diamine 11c showed an IC50 of 0.01 mu M and a selectivity index of 1800.
由取代的N-甲基苯胺制备喹啉环上具有不同取代基的各种11-氯-5-甲基-5 H-吲哚并[2,3- b ]喹啉(新隐油松),它们是抗疟疾药物的关键中间体,可通过以下方法容易地获得苯胺的N-甲基化,以及吲哚-3-羧酸盐的对应物。与使用苯胺的已知方法相比,该方案在减少到达目标的步骤数方面是良性的,并且产品易于纯化。或者,他们的6-甲基同源物由N制备2-芳基氨基吲哚-3-羧酸吲哚部分的甲基化,然后连续环化和氯化。在C11位置的亲核取代反应中,发现11-Chloroneocryptolepines比其6-甲基同类物更具反应性。