Polyethylene glycol (PEG-400) promoted as an efficient and recyclable reaction medium for the one-pot eco-friendly synthesis of functionalized isoxazole substituted spirooxindole derivatives
作者:Nagi Reddy Modugu、Praveen Kumar Pittala
DOI:10.1039/c7nj03515b
日期:——
An efficient, inexpensive and environmentally friendly synthesis of novel isoxazole substituted spirooxindole-pyridopyrimidine/indenopyridine/chromenopyridine/naphthyridine/quinoline derivatives has been developed via one-pot three-component reaction of isoxazolyl enamino esters, isatins and 1,3-dimethylbarbituric acid/1,3-indandione/chromene-2,4-dione/quinoline-2,4-dione/naphthalene-1,2,4-trione/dimedone
新颖异恶唑的一种高效,廉价且环境友好的合成取代spirooxindole-吡啶并嘧啶/ indenopyridine / chromenopyridine /萘/喹啉衍生物已被开发经由异恶唑基烯氨基酯,靛红与1,3-二甲基巴比妥酸/ 1,3-茚满二酮/色烯-2,4-二酮/喹啉-2,4-二酮/萘-1,2,4的一锅三组分反应-使用PEG-400作为溶剂和催化剂的三酮/二甲酮。选择了26种异恶唑基烯氨基酯,7种1,3-二酮化合物和11种取代的isatins进行文库验证。该方法的优点是其环境安全性,无催化剂性,操作简便,无金属操作,多种底物范围,高收率,优异的官能团耐受性和较短的反应时间,PEG-400可以回收和再利用。