3-[(tert-Butoxy)carbonyl]diazenyl}but-2-enoates react in tetrahydrofuran at room temperature with aromatic 1,2-diamines to give 3-methylquinoxaline-2-carboxylates. These products were also obtained in solid-phase synthesis, by using polymer-bound 3-diazenylbut-2-enes.
Improved Synthesis of SubstitutedQuinoxalines from New N=N-Polymer-bound 1,2-Diaza-1,3-butadienes
作者:Paolino Filippone、Fabio Mantellini、Orazio A. Attanasi、Lucia De Crescentini、Stefania Santeusanio
DOI:10.1055/s-2003-39886
日期:——
The first general protocol for the preparation of different N=N-polymer-bound 1,2-diaza-1,3-butadienes is reported. The utility of these supported reagents in the solid-phase in the preparation of 3-methyl quinoxaline-2-carboxylates by reaction with aromatic 1,2-diamines is presented.
A variety of quinoxalines were synthesized via tandem one-pot procedure for the first time in water medium. The key strategy was the in situ preparation of alpha-halo-beta-keto esters by the reaction of N-bromo succinimide with beta-keto esters and further condensation with phenylene diamines. This novel eco-friendly approach offers an easy, efficient, and mild synthesis of highly substituted quinoxalines in good yields. (C) 2011 Elsevier Ltd. All rights reserved.
A Dual-Protein Cascade Reaction for the Regioselective Synthesis of Quinoxalines
作者:Fengxi Li、Xuyong Tang、Yaning Xu、Chunyu Wang、Zhi Wang、Zhengqiang Li、Lei Wang
DOI:10.1021/acs.orglett.0c01186
日期:2020.5.15
system was successfully constructed for the regioselectivesynthesis of quinoxalines in water. A set of quinoxalines were obtained in high yields under optimal reaction conditions. This dual-protein method exhibited a regioselectivity higher than those of previously reported methods. This study not only provides a green and mild strategy for the synthesis of quinoxalines but also expands the application