Cationic Pentaheteroaryls as Selective G-Quadruplex Ligands by Solvent-Free Microwave-Assisted Synthesis
作者:Michele Petenzi、Daniela Verga、Eric Largy、Florian Hamon、Filippo Doria、Marie-Paule Teulade-Fichou、Aurore Guédin、Jean-Louis Mergny、Mariella Mella、Mauro Freccero
DOI:10.1002/chem.201202097
日期:2012.11.5
We report herein a solvent‐free and microwaved‐assisted synthesis of several water soluble acyclic pentaheteroaryls containing 1,2,4‐oxadiazole moieties (1–7). Their binding interactions with DNA quadruplex structures were thoroughly investigated by FRET melting, fluorescent intercalator displacement assay (G4‐FID) and CD spectroscopy. Among the G‐quadruplexes considered, attention was focused on telomeric
我们在此报告的含1,2,4-恶二唑部分(几个水溶性无环pentaheteroaryls的无溶剂和微波辅助合成1 - 7)。通过FRET熔解,荧光嵌入剂置换试验(G4-FID)和CD光谱对它们与DNA四链体结构的结合相互作用进行了彻底研究。在考虑的G-四链体中,注意力集中在端粒重复序列,原癌基因c-kit序列和c-myc癌基因启动子上。化合物1,以及较小范围内的化合物2和5,优选稳定端粒DNA基序的反平行结构,并表现出与结构相关的聚恶唑(TOxaPy)相反的结合行为,并且不结合双链DNA。结合过程的效率和选择性由增溶部分的结构显着控制。