Copper-Catalyzed Desymmetric Intramolecular Ullmann C–N Coupling: An Enantioselective Preparation of Indolines
摘要:
The first highly enantioselective copper-catalyzed intramolecular Ullmann C-N coupling reaction has been developed. The asymmetric desymmetrization of 1,3-bis(2-iodoaryl)propan-2-amines catalyzed by CuI/(R)-BINOL-derived ligands led to the enantioselective formation of indolines in high yields and excellent enantiomeric excesses. This method was also applied to the formation of 1,2,3,4-tetrahydroquinolines in high yields and excellent enantioselectivity.
Copper-Catalyzed Desymmetric Intramolecular Ullmann C–N Coupling: An Enantioselective Preparation of Indolines
摘要:
The first highly enantioselective copper-catalyzed intramolecular Ullmann C-N coupling reaction has been developed. The asymmetric desymmetrization of 1,3-bis(2-iodoaryl)propan-2-amines catalyzed by CuI/(R)-BINOL-derived ligands led to the enantioselective formation of indolines in high yields and excellent enantiomeric excesses. This method was also applied to the formation of 1,2,3,4-tetrahydroquinolines in high yields and excellent enantioselectivity.
Stirring-controlled mono or double aminocarbonylation of 1,3-bis(2-iodoaryl)propan-2-amines
作者:Huaanzi Hu、Zeqiang Xie、Shuang Luo、Qiang Zhu
DOI:10.1016/j.tetlet.2018.01.092
日期:2018.3
A palladium-catalyzed highly selective mono or double aminocarbonylation of 1,3-bis(2-iodoaryl)propan-2-amines under balloon pressure of CO has been developed. Tetracyclic isoquinolino[2,3-b]isoquinolinones were obtained through double aminocarbonylation when the reaction was stirred overnight, as most of organic reactions being operated. We accidentally found that monocarbonylated isoquinolinone products
已经开发了在CO的球囊压力下钯催化的1,3-双(2-碘芳基)丙烷-2-胺的高选择性单或双氨基羰基化反应。当将反应搅拌过夜时,由于大多数有机反应都在进行,因此通过双氨基羰基化反应获得了四环异喹啉代[2,3- b ]异喹啉酮。我们意外地发现,仅搅拌反应混合物就可以形成具有良好选择性和化学收率的单羰基异喹啉酮产物。静止溶液中CO的浓度低可能说明了选择性。
Development and Challenges in Copper-Catalyzed Asymmetric Ullmann-Type Coupling Reactions
作者:Qian Cai、Fengtao Zhou
DOI:10.1055/s-0032-1317866
日期:——
Ullmann-type coupling is one of the most powerful methods for the formation of aryl C–C, C–N, and C–O bonds. Yet asymmetric Ullmanncoupling has received little attention because of the great challenges in both ligand and reaction designs. The success of the first catalytic enantioselective intramolecular Ullmann C–N coupling reaction through an asymmetric desymmetrization strategy offers a new way