Structure-activity relationships of benzimidazoles and related heterocycles as topoisomerase I poisons
作者:Jung Sun Kim、Qun Sun、Barbara Gatto、Chiang Yu、Angela Liu、Leroy F. Liu、Edmond J. LaVoie
DOI:10.1016/0968-0896(96)00047-8
日期:1996.4
the highest activity and was significantly more active than the 4-nitro positional isomer. The 5- and 6-nitro derivatives of 2-(4-methoxyphenyl) benzoxazole, 2-(4-methoxyphenyl)benzothiazole, and 2-(4-methoxyphenyl)indole were synthesized and their relative activity as topoisomerase I inhibitors determined. None of these heterocyclic analogues were effective in significantly inhibiting cleavable-complex
合成了一系列取代的2-(4-甲氧基苯基)-1H-苯并咪唑类,并作为拓扑异构酶I的抑制剂进行了评估。存在5-甲酰基-,5-(氨基羰基)-或5-硝基(即取代基)能够充当氢键受体的分子)与选择的衍生物抑制拓扑异构酶I的潜力相关。与联苯并咪唑和叔苯并咪唑相反,作为拓扑异构酶I毒物具有活性的取代苯并咪唑显示出最低的DNA亲和力或没有DNA亲和力。5-硝基-2-(4-甲氧基苯基)-1H-苯并咪唑显示出最高的活性,并且比4-硝基位置异构体具有更高的活性。2-(4-甲氧基苯基)苯并恶唑,2-(4-甲氧基苯基)苯并噻唑的5-和6-硝基衍生物 合成了2-(4-甲氧基苯基)吲哚和2-(4-甲氧基苯基)吲哚,它们作为拓扑异构酶I抑制剂的相对活性。这些杂环类似物在DNA和拓扑异构酶I的存在下均不能有效地抑制可裂解复合物的形成,这表明与这些取代的苯并咪唑与酶或酶-DNA复合物的相互作用相关的高度结构特异性。在评估它们