作者:Tie-Qiang Huang、Wen-Yan Qu、Jin-Chang Ding、Miao-Chang Liu、Hua-Yue Wu、Jiu-Xi Chen
DOI:10.1002/jhet.1043
日期:2013.3
developed for the condensation of 1,2‐diketones with aromatic 1,2‐diamines in polyethylene glycol (PEG), providing quinoxaline derivatives in good yields. The important features of the methodology are broad substrates scope, simple workup, catalyst free, environmentally benign, and no requirement for metal catalysts. It is noteworthy that the cyclization reaction of 1,2‐diketones with aliphatic 1,2‐diamines
已开发出一种简便且无催化剂的方案,用于将1,2-二酮与芳族1,2-二胺在聚乙二醇(PEG)中缩合,从而以高收率提供喹喔啉衍生物。该方法的重要特征是广泛的底物范围,简单的后处理,无催化剂,对环境无害,并且不需要金属催化剂。值得注意的是,在标准条件下,1,2-二酮与脂肪族1,2-二胺的环化反应也能顺利进行,从而以高收率获得吡嗪。此外,PEG可以轻松回收并重新使用,而活性没有明显损失