of the copper species, ligand, base and solvent was investigated in detail. N-Arylated derivatives of several heteroarylamines were synthesized under optimized reaction conditions, and all the products were isolated in good yields. By controlling the amount of CuI/DMEDA added, heteroarylamines with weak nucleophilic activity were coupled with aryl iodides or aryl bromides. The activity of the copper
通过使用
N,N'-二甲基乙二胺作为
配体和 K2CO3 作为碱在 100°C 下加热的
二恶烷中,实现了简单且廉价的
铜介导的杂芳胺 N-芳基化。在该偶联反应中,详细研究了
铜种类、
配体、碱和溶剂的影响。在优化的反应条件下合成了几种杂芳胺的N-芳基化衍
生物,所有产物均以良好的收率分离。通过控制CuI/
DME
DA的加入量,亲核活性弱的杂芳胺与芳基
碘化物或芳基
溴化物偶联。
铜催化剂在 C-N 键形成反应中的活性遵循 CuI > Cu0 > CuII 的顺序。(© Wiley-
VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)