Direct Synthesis of Pyrrolo[1,2-α]quinoxalines <i>via</i> Iron-Catalyzed Transfer Hydrogenation between 1-(2-Nitrophenyl)pyrroles and Alcohols
作者:Simin Chun、Jiwon Ahn、Ramachandra Reddy Putta、Seok Beom Lee、Dong-Chan Oh、Suckchang Hong
DOI:10.1021/acs.joc.0c02145
日期:2020.12.4
Herein, we describe novel iron-catalyzed transfer hydrogenation between alcohols and 1-(2-nitrophenyl)pyrroles for the synthesis of pyrrolo[1,2-α]quinoxalines. The tricarbonyl (η4-cyclopentadienone) iron complex catalyzed the oxidation of alcohols and the reduction of nitroarenes, and the corresponding aldehydes and aniline were generated in situ. The resulting Pictet–Spengler-type annulation/oxidation
在这里,我们描述了新型的铁催化的醇和1-(2-硝基苯基)吡咯之间的吡咯并[1,2-α]喹喔啉的合成转移氢化。三羰基的(η 4 -cyclopentadienone)铁配合物催化的醇的氧化和硝基芳烃的减少,以及产生相应的醛和苯胺原位。由此产生的Pictet-Spengler型环化/氧化完成了喹喔啉结构的形成。该方案耐受各种官能团,并提供29个4-取代的吡咯并[1,2-α]喹喔啉样品。所开发的方法还用于合成其他多杂环化合物。