Fine Tuning Reactivity: Synthesis and Isolation of 1,2,3,12b-Tetrahydroimidazo[1,2-<i>f</i>]phenanthridines
作者:Craig J. Richmond、Roslyn M. Eadie、Alexis D. C. Parenty、Leroy Cronin
DOI:10.1021/jo901622e
日期:2009.11.6
A facile route for the synthesis and isolation of 1,2,3,12b-tetrahydroimidazo[1,2-f]phenanthridines (TIPs) has been developed. The heterocycle is a reactive intermediate in the three-step cascade synthesis of 2,3-dihydro-1H-imidazo[1,2-f]phenanthridinium cations (DIPs), a biologically active DNA intercalating framework; however, the intermediate has previously only been characterized in situ. Derivatization
已开发出一种合成和分离1,2,3,12b-四氢咪唑并[1,2- f ]菲啶(TIP)的简便方法。杂环是2,3-二氢-1 H-咪唑并[1,2- f ]菲啶鎓阳离子(DIP)的三步级联合成中的一种反应性中间体,DIP是一种具有生物活性的DNA嵌入框架。但是,该中间体以前只能在原位进行表征。咪唑-N位置的结构衍生化控制中间体相对于电势和p K a的反应性允许隔离选定的TIP结构。已经确定了这些参数与反应结果之间的相关性,还研究了其他影响,例如空间和溶剂效应。