1-, 2-, and 4-Ethynylpyrenes in the Structure of Twisted Intercalating Nucleic Acids: Structure, Thermal Stability, and Fluorescence Relationship
作者:Vyacheslav V. Filichev、Irina V. Astakhova、Andrei D. Malakhov、Vladimir A. Korshun、Erik B. Pedersen
DOI:10.1002/chem.200800380
日期:2008.11.10
4-benzoquinone, and a Vilsmeier-Haack-Arnold transformation followed by a Bodendorf fragmentation. Significant alterations in thermal stability of parallel triplexes and antiparallel duplexes were observed upon changing the attachment of ethynylpyrenes from para to ortho in homopyrimidine TINAs. Thus, for para-TINAs the bulge insertion of an intercalator led to high thermal stability of Hoogsteen-type parallel
将合成后的柱上Sonogashira反应应用于序列中间被2-或4-碘苯基甲基甘油修饰的DNA分子上,得到相应的带有1-,2-的邻位和对位扭曲的插入核酸(TINA)和4-乙炔基re残基。方便的合成2-和4-乙炔基from烯的方法是从of的氢解反应中脱除硫,然后分离出4,5,9,10-四氢py和1,2,3,6,7,8-六氢hydro,随后通过连续的Friedel-Crafts乙酰化,2,3-二氯-5,6-二氰基-1,4-苯醌的芳构化和Vilsmeier-Haack-Arnold转化,再由Bodendorf片段化将其转化为最终化合物。改变乙炔基吡啶在同嘧啶TINA中从对位到邻位的连接后,可观察到平行三链体和反平行双链体的热稳定性发生了显着变化。因此,对于对-TINA,插入剂的凸出插入导致Hoogsteen型平行三链体和双链体的高热稳定性,而Watson-Crick型双链体则不稳定。在邻-TINA