Synthesis of benzofurans from the cyclodehydration of α-phenoxy ketones mediated by Eaton’s reagent
作者:Zhanwei Ma、Min Zhou、Lin Ma、Min Zhang
DOI:10.1177/1747519820907244
日期:2020.7
acid) is used to prepare 3-substituted or 2,3-disubstituted benzofurans with moderate to excellent yields under mild conditions. The method provides a facile access to benzofurans from readily available starting materials such as phenols and α-bromo ketones. The reaction is highly efficient, which is attributed to the good reactivity and fluidity of Eaton’s reagent. The reaction can be applied to prepare
由伊顿试剂(五氧化二磷-甲磺酸)促进的 α-苯氧基酮的环脱水用于在温和条件下以中等至优异的产率制备 3-取代或 2,3-二取代的苯并呋喃。该方法提供了从容易获得的起始材料(如苯酚和 α-溴酮)中轻松获得苯并呋喃的途径。反应效率高,这归功于伊顿试剂良好的反应性和流动性。该反应可用于制备萘并呋喃香豆素、苯并噻吩和苯并吡喃。