Copper-Catalyzed Tandem Amide<i>N</i>-Arylation and Regioselective Cyclization of 2-Alkynylbenzamides
作者:Hideki Minami、Takuya Sueda、Noriko Okamoto、Yoshihisa Miwa、Minoru Ishikura、Reiko Yanada
DOI:10.1002/ejoc.201501330
日期:2016.1
stable 2-alkynylbenzamides was developed by using a tandem copper-catalyzed N-arylation and regioselective 6-endo-dig cyclization in the presence of diaryliodonium salts, a copper catalyst, and 2,6-di-tert-butylpyridine. The arylation occurred at the nitrogen atom rather than the oxygen atom of the amide group, the alkynyl carbon, or the benzene ring of the benzamide. Cyclization occurred through a preferential
在二芳基碘鎓盐、铜催化剂和 2,6- 存在下,通过使用串联铜催化 N-芳基化和区域选择性 6-endo-dig 环化,开发了一种从容易获得且稳定的 2-炔基苯甲酰胺形成亚氨基异香豆素的新方法。二叔丁基吡啶。芳基化发生在氮原子而不是酰胺基团的氧原子、炔基碳或苯甲酰胺的苯环上。通过氧而不是酰胺基团的氮原子的优先亲核攻击发生环化,以良好到中等的产率产生亚氨基异香豆素衍生物。