DNA-Directed Alkylating Agents. 7. Synthesis, DNA Interaction, and Antitumor Activity of Bis(hydroxymethyl)- and Bis(carbamate)-Substituted Pyrrolizines and Imidazoles
作者:Graham J. Atwell、Jun-Yao Fan、Karin Tan、William A. Denny
DOI:10.1021/jm9803119
日期:1998.11.1
G-alkylation in C-rich regions. The corresponding thioimidazole bis(carbamates) were more selective than the bis(hydroxymethyl) pyrrolizines, with high-intensity bands at 5'-NCCN, 5'-NGCN and 5'-NCGN sequences in the PCR stopping assay ( indicates block sites). The data suggest that these targeted compounds, like the known thioimidazole bis(carbamate) carmethizole, alkylate exclusively at guanine residues
合成了一系列双(羟甲基)取代的咪唑,硫代咪唑和吡咯嗪和相关的双(氨基甲酸酯),它们与9-苯胺基cr啶(嵌入)或4-(4-喹啉基氨基)苯甲酰胺(次要沟结合)载体相连。评估序列特异性DNA烷基化和细胞毒性。咪唑和硫代咪唑类似物的制备方法是:首先合成[(4-氨基苯基)烷基]咪唑-,硫代咪唑-或吡咯嗪二羧酸酯,将它们与所需的载体偶联,然后还原得到所需的双(羟甲基)烷基化部分。吡咯烷嗪是反应性最高的烷基化剂,其次是硫代咪唑,而咪唑则没有反应性。通过琼脂糖凝胶电泳测量,吡咯嗪和一些硫代咪唑交联的DNA。链切割试验表明,没有化合物在质粒gpt2Eco的gpt区域的嘌呤N7或N3位点反应,但聚合酶终止试验显示在富C区域的G-烷基化模式。相应的硫代咪唑双(氨基甲酸酯)比双(羟甲基)吡咯烷嗪具有更高的选择性,在PCR终止试验中在5'-NCCN,5'-NGCN和5'-NCGN序列处具有高强度条带(指示嵌段位点)