An Environmental Friendly Approach for the Synthesis of Spiro[indoline-3′,2-quinazoline]2′,4(3<i>H</i>)-dione Using 1-Methylimidazolium Hydrogen Sulfate, as Reusable Catalyst
作者:Hassan Kefayati、Masoumeh Vazifeh、Reyhaneh Kazemi-Rad
DOI:10.1002/jccs.201300147
日期:2013.7.22
A facile and environmentally benign procedure for the synthesis of 3‐aryl‐1H‐spiro[indoline‐3′,2‐quin‐azoline]2′,4(3H)‐dione from isatoic anhydride, aromatic amines and isatin derivatives in Brønsted acidic ionic liquid, 1‐methylimidazolium hydrogen sulfate, was reported. The ability to reuse the ionic liquid, the high yield, short reaction time and ease of purification are the important features of
从邻苯二甲酸酐,芳香胺和靛蓝衍生物合成3-芳基-1 H-螺[吲哚啉-3',2-喹-偶氮啉] 2',4(3 H)-二酮的简便环保的方法。报道了布朗斯台德酸性离子液体硫酸1-甲基咪唑鎓。重用离子液体的能力,高收率,较短的反应时间和易于纯化是该方法的重要特征。