A General Copper Powder-Catalyzed Ullmann-Type Reaction of 3-Halo-4(1<i>H</i>)-quinolones With Various Nitrogen-Containing Nucleophiles
作者:Davide Audisio、Samir Messaoudi、Jean-François Peyrat、Jean-Daniel Brion、Mouâd Alami
DOI:10.1021/jo200680j
日期:2011.6.17
3-(N-Substituted) 4(1H)-quinolinones were synthesized using the copper-catalyzed Ullmann C–N bond forming strategy in moderate to quantitative yields. Starting from 3-halo-4(1H)-quinolones, various nucleophiles including amides, lactams, sulfonamides and NH-containing azoles have been used successfully. In all cases, the reactions take place rapidly in toluene and proceed by using copper powder as
使用铜催化的Ullmann C–N键形成策略以中等至定量的产率合成了3-(N-取代的)4(1 H)-喹啉酮。从3-卤代-4(1 H)-喹诺酮类化合物开始,已成功使用了各种亲核试剂,包括酰胺,内酰胺,磺酰胺和含NH的唑。在所有情况下,反应都在甲苯中迅速进行,并通过使用铜粉作为催化剂,DMEDA作为配体和K 2 CO 3作为碱进行。此外,在我们的Cu / DMEDA催化剂体系下,其他相关杂环,例如3-溴喹啉-2(1 H)-ones,3-溴香豆素和3,5-二溴-2-吡啶酮显示出与各种亲核试剂的良好或非常高的反应性。 。