The use of aminals as precursors for iminium ions has been limited to methylene derivatives, thus hampering its broader use. By employing electron-deficient iminium ions an obvious hurdle of the methodology is overcome, whilst generating highly desirable motifs. This broad concept is highlighted by the late-stage amination of quinine into a biologically interesting new analogue.
缩醛胺作为
亚胺离子前体的使用仅限于亚甲基衍
生物,因此阻碍了其更广泛的应用。通过使用缺电子
亚胺离子,克服了该方法的一个明显障碍,同时产生了非常理想的基序。
奎宁后期胺化为
生物学上有趣的新类似物突出了这一广泛概念。