4-bromoacetophenone in six steps is presented. The dications bind to poly dA.dT in the order 7 > 13 > 18 > 8 > 9; the order of binding to poly A.U is 7 > 13 > 8 > 9; 18 essentially does not bind to the RNA model. Only 7 inhibits topoisomerase II at millimolar concentrations. The dicationic compounds that were tested against Pneumonocystis carinii in the immuno-suppressed rat model show only modest activity
2,6-双[4-(4,5-二氢-
1H-咪唑-2-基)苯基]
吡啶7, 2-[4-(4,5-二氢-
1H-咪唑-2-基)的合成)-苯基]-6-[3-(4,5-二氢-
1H-咪唑-2-基)苯基]
吡啶8和2,6-双[3-(4,5-二氢-
1H-咪唑-描述了来自适当取代的
溴苯乙酮的五个步骤中的 2-基)苯基]
吡啶 9。还报道了 3,5-双[4-(4,5-二氢-
1H-咪唑-2-基)苯基]
吡啶 13,由 4-
溴苯基
乙腈分四步制备。2,5-双[4-(4,5-二氢-
1H-咪唑-2-基)-苯基]
吡啶 18 由
4-溴苯乙酮分六步制备。指示以 7 > 13 > 18 > 8 > 9 的顺序与聚 dA.dT 结合;与poly AU的结合顺序为7>13>8>9;18 基本上不与 RNA 模型结合。只有 7 在毫摩尔浓度下抑制拓扑异构酶 II。在免疫抑制大鼠模型中针对卡氏肺囊虫测试的双阳离子化合物仅显示出中等活性并且具有中