A One-pot Facile Synthesis of 2,3-Dihydroxyquinoxaline and 2,3-Dichloroquinoxaline Derivatives Using Silica Gel as an Efficient Catalyst
作者:Pei-Ming Zhang、Yao-Wei Li、Jing Zhou、Lin-Ling Gan、Yong-Jie Chen、Zong-Jie Gan、Yu Yu
DOI:10.1002/jhet.3224
日期:2018.7
An efficient one‐pot reaction has been developed for the synthesis of 2,3‐dichloroquinoxaline derivatives 3a–n. The reaction was performed in two steps via a silica gel catalyzed tandem process from o‐phenylenediamine and oxalic acid, followed by addition of phosphorus oxychloride (POCl3). A variety of 2,3‐dichloroquinoxalines have been obtained in good to excellent overall yields. Eight known compounds
已经开发出一种有效的一锅反应,用于合成2,3-二氯喹喔啉衍生物3a - n。该反应通过邻苯二胺和草酸的硅胶催化串联过程分两步进行,然后加入三氯氧化磷(POCl 3)。已获得各种2,3-二氯喹喔啉,总收率良好至极佳。通过IR,1 H-NMR和质谱对八种已知的化合物3a - 3h进行了表征。没有光谱数据的化合物3i - 3n的特征在于IR,1 H-NMR,13C-NMR和质谱。