New Porphyrin-Nucleobase Hybrid Compounds and Their Interaction with Nucleosides and Nucleic Acids
作者:Vladimir Malinovski、Lydia Tumir、Ivo Piantanida、Mladen Zinic、Hans-Jörg Schneider
DOI:10.1002/1099-0690(200211)2002:22<3785::aid-ejoc3785>3.0.co;2-4
日期:2002.11
described: one (1) with a methoxyphenyl group and three pyridinium units (for comparison only), and three others with either adenine (2, 3) or thymine (4) bases. The synthetic strategies vary from known literature procedures in that the methylation of pyridinium subunits takes place before the formation of the hybrid molecule, beginning with simultaneous condensation of pyridinealdehyde and 3-(propionyloxy)benzaldehyde
描述了四种新的卟啉衍生物:一种 (1) 带有甲氧基苯基和三个吡啶鎓单元(仅供比较),另外三种带有腺嘌呤 (2, 3) 或胸腺嘧啶 (4) 碱基。合成策略不同于已知的文献程序,因为吡啶鎓亚基的甲基化发生在杂化分子形成之前,从吡啶醛和 3-(丙酰氧基)苯甲醛的同时缩合开始,随后在改进的条件下进行色谱。通过用合适的胸腺嘧啶-烷基溴处理,从三甲基化四吡啶基卟啉T4PyP获得胸腺嘧啶衍生物4。在水中的稀释实验表明在所使用的实验条件下不存在分子间卟啉缔合。UV 和 NMR 光谱数据表明卟啉部分和共价连接的核碱基之间存在强烈的分子内自堆积。这导致卟啉-核碱基缀合物对添加的核苷的亲和力比用参考化合物三-或四-吡啶鎓卟啉(分别为 1 和 TMPyP)观察到的更小。基于核碱基的互补性,化合物 2-4 没有显示出 A 和 T 之间的显着区分,这可以通过大量水与 Watson-Crick 氢键的强烈竞争来解释。配体