An efficient, metal free approach to highly substituted 2-pyrrolines by DBU-catalyzed tandem additions (a formal [3+2] cycloaddition) of electron-deficient 1,3-conjugated enynes and 2-aminomalonates under mild conditions was developed.
通过在温和条件下对缺电子 1,3-共轭烯炔和 2-
氨基丙二酸酯进行
DBU 催化的串联加成(正式的 [3+2] 环加成),开发了一种高效、无
金属的高度取代的 2-
吡咯啉方法。